The center is an official CrossFit® affiliate. Last checked: 12/12/2025

CrossFit is a registered trademark owned by CrossFit, LLC, which is not affiliated with FitFit UK.

Information about Sea City CrossFit®

Unit 3, 25 Carlton Terrace, Portslade, Brighton
BN41 1XF, Dover

Opening hours

  • sunday: (closed)
  • monday: 6h-20h
  • tuesday: 6h-20h
  • wednesday: 6h-20h
  • thursday: 6h-20h
  • friday: 6h-20h
  • saturday: 9h-11h
Sea City CrossFit is a small supportive CrossFit box in Brighton & Hove UK with a BIG personality. We have developed a fitness program to get you in the best shape of your life by providing: Workouts For All Levels Expert Coaches To Guide You A Community To Keep You Motivated & Have Fun Nutrition Coaching Personalised Fitness Plans Is it time to finally get the results you want? Book an INTRO today!!!

Our comment from FitFit UK about Sea City CrossFit:

Sea City CrossFit is a remarkable fitness center that excels in providing an inclusive and supportive environment for individuals of all fitness levels. Users praise the welcoming atmosphere fostered by expert coaches Emma and Dan, along with their supportive team, who focus on tailoring workouts to suit each member's abilities. The small class sizes ensure personalized attention, maximizing each participant's potential and facilitating significant progress.

Members appreciate the variety of workouts designed to keep training engaging and challenging, while also enhancing overall fitness—including strength, endurance, mobility, and flexibility. The coaches are described as knowledgeable, approachable, and committed to helping everyone improve their technique. Many users have noted that they leave each session feeling motivated and excited about their fitness journey.

Additionally, the community atmosphere is highlighted as a major asset, with members always willing to support and cheer each other on, creating a strong sense of belonging. With consistently positive feedback regarding the coaching quality and team spirit, Sea City CrossFit is highly recommended for anyone looking to break into CrossFit or enhance their fitness experience.

Services, Machines and Guided Classes

CrossFit®
Fit
Workout
Fit Box

Sea City CrossFit®: Opinions

5/5 (55 Opinions)
Matthew Tully 1 year ago

Fantastic experience: Sea City is easily the best thing I have done in my many attempts to get fit and stronger. I was nervous before my first session as this was something completely new, and I've never been confident in gyms or classes. But I really didn't need to be. The atmosphere is excellent, both from the coaches and other members; in one of my first sessions, other members were encouraging me when I was really struggling and ready to give up or take it easy. Emma and Dan have created a really welcoming, supportive, and fun environment. I also feel I am pushed every session by Emma and Dan, along with Emily and Joe, the other two excellent coaches, to levels I would never get to in a gym, while also having workouts tailored to my current ability, strength, mobility and flexibility so that they remain safe and my form/technique is steadily improving every session. Smaller classes mean I always get the support and advice I need. Sea City is excellent; I look forward to going to every session, and I would highly recommend it.

Sea City CrossFit
Sea City CrossFit

It's a pleasure to have you in class Matt! Thank you for your kind words. You're doing awesome.

stacey croucher 1 year ago

Fantastic experience: I joined Seacity in April, having never done Crossfit before. Tbh, I wasn't sure at first, smaller groups, programmes and work outs I've never done or tried before. But I can honestly say, after 5 months, of being part of the Seacity family, and that's what it is, I would recommend. It pushes me to do things / try things I'd never do in the gym. It keeps me consistent, ive seen progress in my ability, and the people are super supportive and friendly and there is a lovely social feel to the club.

Adam Webb 1 year ago

Fantastic experience: Whether your into your CrossFit or not, you need to give this place a go. Very welcoming atmosphere and top notch equipment. Was feeling a bit unmotivated to train but that soon changed when I walked in. Great set-up and would deffo recommend.

Martin Sprange 1 year ago

Fantastic experience: Come join the community. Great x fit gym. Full of friendly helpful people. The coaches, know their onions

Sea City CrossFit
Sea City CrossFit

Thank you Martin!

stephen legrove 2 years ago

Fantastic experience: Friendly box, great place to experience/learn crossfit. Coaching is brilliant.

Sea City CrossFit
Sea City CrossFit

Thank you, Stephen!! Very glad to have you with us.

Peter Loos 2 years ago

Fantastic experience: Sea city CrossFit is a great choice and due to its size very personal. Dan and Emma have fun in what they're doing and it shows in ever changing and challenging workouts. Keep up the awesome work

bishoy romani 3 years ago

Fantastic experience: Great coaches & CrossFit community.

Sea City CrossFit
Sea City CrossFit

Thank you Bishoy!

Christopher Gleeson 3 years ago

Fantastic experience: Good workouts and motivational coaches!

Sea City CrossFit
Sea City CrossFit

Thank you Chris!

Matheus Matioli 3 years ago

Fantastic experience: Incredible community and great coaching! If you're new to crossfit this is the gym to get you to the next level.

Sea City CrossFit
Sea City CrossFit

Thanks Matty!

Monika Dworaczek 3 years ago

Fantastic experience: My church! My religion and Dan is my vicar! If you havent tried it, then you are missing out! Best place !

Sea City CrossFit
Sea City CrossFit

Thanks Monika!

Beccy Eason 3 years ago

Fantastic experience: Happy, friendly atmosphere! Emma and Dan have helped me to get fitter.

Sea City CrossFit
Sea City CrossFit

Thank you Beccy!

Thomas Clark 3 years ago

Fantastic experience: Great facility, awesome coaches & lovely people!

Sea City CrossFit
Sea City CrossFit

Thanks Tom!

Mario Buendía García 3 years ago

Fantastic experience: Best box and best coaches in UK. No doubt

Darren Jones 3 years ago

Fantastic experience: An awesome place to train with great coaches.

Sea City CrossFit
Sea City CrossFit

Thank you Darren!

Pablo Márquez 3 years ago

Fantastic experience: Amazing staff, very helpful coaching and really good environment. The programming is really good as well and easy to work around. They have plenty of open gym sessions for those that also want to specialise.

Sea City CrossFit
Sea City CrossFit

Thanks Pablo!

Adam Moseley 3 years ago

Fantastic experience: Emma and Dan are great coaches and owners. Well run, friendly and supportive CrossFit box. Very welcoming and inclusive community!

Sea City CrossFit
Sea City CrossFit

Cheers Buffy!

Passione Napoletana 3 years ago

Fantastic experience: Due to the small nature of the classes the support given is much higher than in other boxes. Its almost has having a personal trainer making sure your technic and performance are correct. Doesn’t matter your fitness level they will scale it on order for you to progress during your training.

Sea City CrossFit
Sea City CrossFit

Thanks Joana!

max davies 3 years ago

Fantastic experience: With a great team atmosphere, knowledgeable instructors that really take the time to set you up to succeed and a wide variety of activities throughout the classes you'll actually look forward to going to the gym!

Sea City CrossFit
Sea City CrossFit

Thank you Max!

Chris Knott 3 years ago

Fantastic experience: I really needed an alternative to the usual gym that motivates, teaches and pushes you all the way and the guys at Sea City CrossFit really provide this in droves. It’s a great atmosphere and really friendly. No egos and everyone is really welcoming and helpful. Thanks guys and keep up the good work

Sea City CrossFit
Sea City CrossFit

Appreciate it Chris!

Rachel Cleverley 3 years ago

Fantastic experience: Brilliant coaching, welcoming atmosphere, and a true CrossFit community feeling through & through! Would highly recommend Sea City for anyone wanting to get fit, have fun, and meet likeminded people (especially those who are new to the sport)

Sea City CrossFit
Sea City CrossFit

Cheers Clevers!

Darryl Graham 3 years ago

Fantastic experience: Regardless of your ability or even if you’re starting from scratch, Sea city crossfit is a great place to join. Friendly members and instructors always willing to help and ensure you get the best out of yourself on that day. Highly recommend sea city crossfit…

Sea City CrossFit
Sea City CrossFit

Thanks Darryl!

jenny parkwood 3 years ago

Fantastic experience: As someone who had never done crossfit or any weightlifting before, I have really enjoyed the sessions at Sea City CrossFit. The instructors help me to scale the exercises to things I can build on, and everyone is welcoming and enthusiastic!

Sea City CrossFit
Sea City CrossFit

Pleasure having you with us Jenny!

celia valero 3 years ago

Fantastic experience: I have been a member of Sea City since September and I honestly LOVE it and enjoy it so much! Dan and Emma are very professional and motivational, and everyone is so friendly and welcoming! One of the best decisions I made in 2021 :)

Sea City CrossFit
Sea City CrossFit

Thank you Celia!

Simon Verschuren 3 years ago

Fantastic experience: Joint in 2021. Enjoying it ever since. Venue is small, equipment is good. Because of the small venue you get almost 1on1 coaching. Emma and Dan are fab. Very knowledgeable and excellent coaching. All abilities are welcome and receive excellent coaching. I’m pleased with the progress I have made so far and I’m confident I keep progressing.

Sea City CrossFit
Sea City CrossFit

Thank you Simon! Pleasure to have you with us

Joseph Toft | Drewberry 3 years ago

Fantastic experience: I've been training here for 2 years or so. I can honestly say this is the best gym I've ever trained at. The coaches are AMAZING, the programming is spot on and the members are legends. Every area of my fitness has improved beyond what I thought I was physically capable of. I’m never leaving! #seacity4lyfe

Rachel Surrage George 3 years ago

Fantastic experience: I came to Sea City to try and improve my strength to help with a longstanding injury. I'd been in pain for more than a year when I started. I'm now 5 months into membership and virtually pain free - the coaching by Dan, Emma and Gabs is second to none, class sizes are small and everyone is incredibly friendly and encouraging, even if you're a seized up internet addict like me. 100% wld recommend. - Tosh

Sea City CrossFit
Sea City CrossFit

Thanks Tosh! Pleasure having you with us.

Chris Newton 3 years ago

Fantastic experience: Thoroughly enjoyable box to train at. Great coaches really nice people very varied workouts. Much smaller classes than at other CrossFit gyms. Perfect whether it’s your first ever crossfit class or if you have been doing it a while this gym is perfect for you.

Sea City CrossFit
Sea City CrossFit

Thanks Chris!

Naomi Richardson Matioli 3 years ago

Fantastic experience: This is my first time going to a CrossFit gym and SeaCity have been simply incredible. Dan and Emma are so friendly and break everything down so it's not intimidating. Also everyone in the classes is so lovely and supportive - so grateful for this community!

Sea City CrossFit
Sea City CrossFit

Appreciate it Naomi!

Richard P 3 years ago

Fantastic experience: Having been put off other CrossFit boxes due to it being a bit too much like a cult, its been great to discover the Sea City crew. Dan, Emma and Gaby are enthusiastic, knowledgeable and encouraging without crossing over into that slightly weird place where I'm told I have to eat coleslaw for breakfast. Absolutely recommend giving it a go!

Sea City CrossFit
Sea City CrossFit

Coleslaw for breakfast happy to have you with us Rich!

Sarah McHie 3 years ago

Fantastic experience: I am new to Brighton and wasn't sure what CrossFit box to join, but Sea City came highly recommended and I see why! The community is tight, everyone is friendly and welcoming. The programming is made so you get the best workout tailored to your fitness level which makes everyone feel like they had a great workout. I really appreciate how the coaches keep me honest while keeping things fun!

Sea City CrossFit
Sea City CrossFit

Thank you Sarah, we’re happy to have you with us!

Stephanie Faber 3 years ago

Fantastic experience: Best decision I made in my fitness journey. My aim was to become stronger, improve my endurance and stamina. One important aspect to me is always: " but how good is the teaching" . Sea city crossfit has the best coaches. Emma and Dan are extremely knowledgeable, experienced and really care about your success. And that in return gives you the confidence to push further. The atmosphere is incredible and there has not been a day were I left thinking " thank f*$%# that was good "

Sea City CrossFit
Sea City CrossFit

Thanks Steph, you're smashing it!

Leasa Williams 3 years ago

Fantastic experience: Awesome CrossFit box!! Coaches are professional whilst also being super friendly and approachable. I have been to 3 different CrossFit boxes and SeaCity is my favourite by far. It’s the perfect place if you want to really push yourself to reach your fitness goals or to start out on your fitness journey. They make an effort to make everyone feel welcome and I leave the sessions buzzing! Can’t recommend it enough!

Sea City CrossFit
Sea City CrossFit

Thank you Leasa!

Chris Georgiou 3 years ago

Fantastic experience: I've been a member for over three months and can honestly say it's been the most rewarding and challenging type of fitness I've participated in. Initially I joined with a membership for 3 sessions per week. I soon upgraded to allow me access to all the classes Monday - Saturday. The programmes are well thought out and challenge all aspects of your fitness. What really appealed to me is the skill development and improvement of technique in many functional movements and lifting. I quickly realised that I have picked up many bad habits and form from working out in a gym. The coaches are brilliant. They will spend time with you working on improving form and technique. Especially when you are new to the class. It feels like you are learning something new each time, which helps with motivation and dedication. They are very approachable and super friendly. Making you feel part of the CrossFit community from the off. It is a great environment to train in as other club members are very supportive and encouraging. People are always smiling (even after a seriously hard session). I'd thoroughly recommend joining Sea City no matter your levels of fitness or ability.

Sea City CrossFit
Sea City CrossFit

We’re happy to have you with us Chris and really appreciate this review. Thanks!

Giada Brianza 3 years ago

Fantastic experience: When I started, I was super scared of joining a CrossFit gym. So many myths and legends about crazy crossfiters who just care of lifting billions of kilos and speak about the best timing in the workout. Not at all. Here I found a very welcoming place, full of amazing and kind people that always smile and always help you. You don't have to be fit, muscled, big to do CrossFit. You don't need to have a past of weightlifting or gym going. You just have to be willing to learn and have fun. And all of this is possible thanks to the best coaches ever. Super qualified, super patient, super respectful, and super friendly!!!!

Sea City CrossFit
Sea City CrossFit

Thank you Giada!

joana filipa silva 4 years ago

Fantastic experience: Great atmosphere, great coaches and members...

Sea City CrossFit
Sea City CrossFit

Thanks Joana!

Rachel Doherty 4 years ago

Fantastic experience: Best gym around. Possibly ever.

Sea City CrossFit
Sea City CrossFit

We believe so too ;)

Ben Ashby 4 years ago

Fantastic experience: Great cross fit gym in Brighton

Sea City CrossFit
Sea City CrossFit

Cheers Ben!

Luke Boyhan 4 years ago

Fantastic experience: Great gym in Brighton . Coaching staff really know their stuff.

Sea City CrossFit
Sea City CrossFit

Cheers Luke!

George Baghdady 4 years ago

Fantastic experience: Best CrossFit in Brighton and the Coaches are amazing :)

Sea City CrossFit
Sea City CrossFit

Gorgeous George, thank you!

Eliza Castleton 4 years ago

Fantastic experience: Been a member here since August and have loved every session. Constantly varied programming so no matter which day you train, you get to try a bit of everything. Great at helping you reach all your targets. Also a really fun place to train

Sea City CrossFit
Sea City CrossFit

Thanks Eliza!

Gabs Per 4 years ago

Fantastic experience: This Box is unreal, from coaches to members this place is top class! It Is a big pleassure to train in here and every morning i'm looking forward to go and train hard. If you are looking a place to bring your fitness to the next level, defo you shoul check it out ! Massive well done guys! Gabs

Sea City CrossFit
Sea City CrossFit

Cheers Gabs, we're happy to have you here!

d d 4 years ago

Fantastic experience: Fantastic smaller gym, very knowledgeable coaches. Training specific for each individual according to their ability and needs. Best place to train in the Brighton and Hove area

Sea City CrossFit
Sea City CrossFit

Thank you!

Flavia Bonalumi 4 years ago

Fantastic experience: I've been a member for almost two months and I'm already making so many progresses! The coaches are great, very nice and competent and the environment is very friendly and supportive. Definitely recommend it!

Sea City CrossFit
Sea City CrossFit

We're happy to have you Flavia!

Maria SANZ RUIZ 4 years ago

Fantastic experience: Such a great place! The spaces are very limited and it feels almost like personal training. I would highly recommend it to anyone who would like to push their fitness to the next level.

Sea City CrossFit
Sea City CrossFit

Awesome, thanks Maria!

Vicki Rishbeth 4 years ago

Fantastic experience: I've been a member of Sea City for around 18 months. It was only moving to this Box I realised how much focussed programming and attentive coaching can make such a difference to my progression. Gymnastics and Olympic Lifting has improved no end. That aside, its a great bunch of humans who work out, no cliques, dramas or egos. Actually is the best hour of my day. :-)

Sea City CrossFit
Sea City CrossFit

Thanks Vicki!

david parker 4 years ago

Fantastic experience: I joined Sea City CrossFit about a year ago and I'm totally appreciating the excellent coaching and feedback. I feel much more solid in my technique. It's a great community and everyone is made to feel really welcome.

Sea City CrossFit
Sea City CrossFit

We're so happy to hear it, thanks David!

Stevie Jo 4 years ago

Fantastic experience: I have attended other Box’s in Brighton and Hove and I can honestly say that this is the best one. The Trainers Emma and Dan are both friendly and supportive. They are able to break things down and explain new movements clearly. The box feels really inclusive and there is always a great atmosphere. I can’t recommend it more!

Sea City CrossFit
Sea City CrossFit

Thanks Stevie!

Loulou Storey 4 years ago

Fantastic experience: I've been doing crossfit for a few years but it wasn't until moving to SeaCity that I had this level of teaching and such an amazing variety of workouts. They make sure that your technique is on point and that every part of your body gets stronger and fitter. The box also has the most inviting and welcoming atmosphere of any I've been to. I love it.

Sea City CrossFit
Sea City CrossFit

Thank you Loulou!

Abishek Maroli 4 years ago

Fantastic experience: I spent a year training at SeaCity CrossFit. Fantastic coaching, amazing community and guaranteed results. Regardless of whether you’re a beginner looking to establish fitness goals or an experienced athlete looking to get better, Sea City CrossFit is for everyone.

Sea City CrossFit
Sea City CrossFit

Abi! Thank you

Uta UB 4 years ago

Fantastic experience: So glad I joined Sea City CrossFit! Great community, excellent coaches and the best workouts. I noticed a difference in my strength and stamina after just 4 weeks. 3 months in an I'm still loving it and feeling stronger than ever. Highly recommended!

Sea City CrossFit
Sea City CrossFit

So glad to hear it, thanks Uta!

Yasmin Hoque 4 years ago

Fantastic experience: I have been with SeaCity for about a month and have really enjoyed it. I was nervous when first joining as I have not done anything like this before, but Emma and Dan were really welcoming and made it work to my fitness level. I have enjoyed every class I have done so far, not only is everyone so lovely, but also so supporting! I like how you get to do a bit of everything, I would definitely recommend!

Sea City CrossFit
Sea City CrossFit

Thank you Yas. Pleasure to have you in class with us!

Jo McAllen 6 years ago

Fantastic experience: Just had my first olympic weightlifting class at CrossFit Decennia! So chuffed with what i accomplished tonight and the club are so friendly and welcoming

Francesca 6 years ago

Fantastic experience: Many thanks to Dave and Emma at Decennia for fitting me in for three sessions during my visit to Brighton last week. I appreciated your availability on short notice and excellent technical tuition. I am working on it. I will make a point to return when next in Brighton in late September. Francesca Ardigo

melanie smith 6 years ago

Fantastic experience: Coming back to Crossfit after having 2 babies and being totally unfit was scary. Emma, David and Damo have been a brilliant team. They have encouraged me and I have lost 1.5 stone in weight in the last 5 months and lots of inches. They have been so kind and scaled the exercises whilst making me feel so welcome. If you are thinking of starting/trying or are a high level athlete in CrossFit, Decennia is a fantastic place to train.

Kay Sexton 6 years ago

Fantastic experience: Five stars are not enough! Decennia is a deceptively small CrossFit box with huge benefits: limited class sizes means everybody gets the coach's attention, excellent tuition and motivation creates an amazing atmosphere in which to train and superb quality coaching ensures rapid results and gains. After five years away from CrossFit, Decennia had me hooked again within a week.

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