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South Coast Triathlon


Click here to enter

Date: Saturday 21st August 2021
Venue: Martello Fields, Seaford, East Sussex, BN25 1JX
Swim: Sea
Olympic & Relay: 1500m swim - 40k cycle - 10k run
Sprint & Relay: 750m swim - 20k cycle - 5k run

Super Sprint & Fun

& Mini Fun Relay:

200m swim - 10k cycle - 2.5k run
Minimum Age: 14 years for Fun, Fun Relay, Super Sprint, Sprint & Sprint Relay distances
16 years for Olympic Relay team members
17 years for Olympic distance individuals
Entry fees from:

£74.95 Olympic (non BTF)   

£69.95 Sprint & Super Sprint (non BTF) 

Please Note: Competitor Race Day Information (Individual Start Times, Bib Numbers etc) will be emailed out to competitors 7-10 days before the event.

For more information, see the sections below:

The Event

The race offers not only a spectacular seaside venue, but is also a perfect spectator friendly course, ideal for family and friends who come along to support you and watch the non stop action in a fun and relaxed atmosphere. The venue guarantees large crowds to cheer you along whilst you swim, cycle and run. A great weekend or day out for all!

  • Fantastic coastal and spectator friendly venue
  • Open water sea swim
  • Flat, closed to traffic bike course
  • Scenic promenade run
  • All abilities welcome from novice to pro-triathlete
  • 2021 finishers medal for all entrants
  • Prizes for top 3 male and female triathlete in Super Sprint, Sprint, & Olympic races as well as age group prizes in the Sprint and Olympic Triathlon
  • Entries open to 14+ yr olds in the Sprint, Super Sprint & Fun distances
  • South Coast Run follows this event on Sunday 22 August with 1/2 Marathon, 10k and 5k Fun Run

Wave times - start times are approximate & subject to change

09.00am Olympic & Relay

10.30am Sprint & relay
11.15am Super Sprint & Fun

More information about your race

Please take some time to read all the event information, it will make it far more enjoyable for you and reduce the need to ask questions on the day. Good luck and have a great day!

Race Day Information 2019

You can use this information as a guide for your event. Full and up to date 2021 competitor race day information with your race number and start time will be emailed to you 7-10 days before the event.

WE DO NOT POST ANYTHING OUT - you will collect your race numbers, tattoos, stickers etc. at registration on the day.

Course Maps

PDF Documents: click each to open or download

South Coast Tri Main Arena Map
South Coast Tri Swim Course Map
South Coast Tri Run Course Map
South Coast Tri Run Course Start & Finish

Bike Map:

To view course direction & distance markers, please click on, “view full version” (top left-hand corner of the map) or run your mouse cursor along the mountain graph to see course direction.


I competed in my first triathlon this year at Seaford.

The organisers and the support staff were the most fantastic people! From the guy who tied my shoelaces just before the cycle start line, to the young girl cheering us through to the finish line, these people were helpful, supportive, friendly and soooo happy! It is down to them that I am going to come back again next year! Please pass on my thanks & gratitude.x


I just wanted to take a few minutes to thank you

And all the staff for the wonderful event. It was my first Triathlon and i was very nervous. I have to say that I was so touched by the encouragements, dedication, professionalism and kindness of the people over there. It was just awesome, fun and unforgettable! I will definitely do it again next year and bring some friends and family. That was just perfect! Thank you,


Just wanted to say how extremely impressed

I was on the organisation of the South Coast Triathlon. Particularly impressed with the compere at the finish line who managed to announce names of competitors as they came through the finish and also where they came from, such a personal touch. I really don't know how he did it, with 3 races going on and also a relay.

UK Triathlon Covid Safe Events

All UK Triathlon 2021 events

2020 brought the need for change in the way we run our events, in what could only be described as an exceptionally difficult year for all.

With six events safely & successfully delivered in 2020, we are confident we can fulfil our calendar of events in 2021.

We will continue to comply with social distancing and existing guidelines, following the format we delivered successfully last year.

Below you can read more detailed information on our current format and rest assured this will be amended/updated if/when necessary.

In the meantime, we wish you all the best with your training activities and look forward to welcoming you to an event soon.

Your Health before the Event
If you have any Covid-19 symptoms do not come to the event. If you develop symptoms within 14 days after the event and are tested positive, please contact UK Triathlon immediately.

Social Distancing
Can we please remind you it is each and every person's responsibility to social distance. The same will apply at all UK Triathlon events.

Start Format
Instead of mass starts throughout the day for open water events, each competitor will start at intervals, giving everyone their own individual start time and space. We run this format, very successfully, in all our pool-based triathlons and it works perfectly. Pool based events will also have slightly longer start intervals than usual between competitors.

At some events it may be necessary to ask that you don't unnecessarily bring spectators to help make social distancing easier for everyone.

Every competitor will be temperature checked before being allowed to register. Only two competitors will be allowed to register at a time. The queue for registration will be separated by ground markers to assure a minimum of 2 metre separation. We will provide a sanitising hand station which you must use before entering registration.

Hand Sanitising
There will be 10 hand sanitiser stations around the venue, please hand sanitise before registration, entering transition, finish line and whenever you have the opportunity to do so before and after the event.
Please sanitise before and after toilet use.

Race Brief
There will be a rolling live race brief at the poolside or lakeside. As competitors will start at regularly spaced intervals, this will prevent groups of people and a 2 metre distancing measure will be in operation.

Bike Course
Normal drafting rules apply.

Run Course
Overtake or pass other competitors at a minimum distance of 2 metres where possible.

Feed Stations Run & Finish line
Drinks will be dispensed for you at feed stations, High5 Energy Source & Water will be identified clearly with signs. Move away as quickly as possible allowing for other competitors. Bin your litter. When you have crossed the finish line, we ask you not to stay in that area for any longer than required. Drinks will be dispensed for you at the finish feed area, please move away as quickly as possible to allow other finishers through.

We will not operate our results screen at the event. Provisional results will be online at www.uktriathlon.co.uk later the same day.

Prize Presentation
Presentations will take place throughout the day, please observe 2 metre social distancing if attending the presentation.

Your Covid Officer is Vic Bickerton
If you wish to report anything regarding Covid safety, please report it to Vic located at the finish line.

Entry Form

South Coast Triathlon 2021


(Price per race entry or per relay team)

Please select your race from the drop down list below. The price will adjust automatically.

Telephone Entry

If you would prefer to enter over the phone please call

01270 842800 and secure your place today!

(Lines are open Monday to Friday, between 9:30am-3:00pm).


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