Swim. Run. Done.

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Following the success of the ever-popular Frosty Aquathlon, Tuff Fitty Triathlon Club is proud to introduce the HeatWave and MicroWave Aquathlons – a brand-new summer race experience on the beautiful West Sussex coast.

Taking place on Sunday 5th July 2026, the event is based at The Wave, Littlehampton (BN16 2NA) and offers a fast, friendly and welcoming race environment for athletes of all abilities.

Whether you’re an experienced triathlete, a runner looking to try something different, a swimmer wanting a new challenge, or a previous Frosty competitor aiming to beat your winter performance, HeatWave is the perfect event for you.

The Venue

The event starts with a pool swim in the excellent 8-lane, 25-metre pool at The Wave, before heading out onto a scenic run course through Mewsbrook Park and along Littlehampton’s stunning seafront promenade.

With a safe pool swim, easy transition, a flat run course and supportive atmosphere, the HeatWave or the MicroWave are ideal for both first-timers and seasoned racers.

Choose Your Challenge

🔥 HeatWave – 800m Pool Swim, 10km Run

⚡ MicroWave – 400m Pool Swim, 5km Run

Whether you’re chasing a personal best or simply looking for a great summer race, there’s an option to suit you.

Who Can Enter?

Everyone is welcome.

You don’t need to have raced Frosty before, belong to a club, or have previous multisport experience. If you’re ready to swim, run and enjoy a fantastic race-day atmosphere, we’d love to see you on the start line.

Entry Information

Entries close: Sunday 28th June 2026

Please note that entries are available online only. There will be no entries on the day.

Entry Fees

British Triathlon Members
£35.00*

Non-British Triathlon Members
£43.00 (includes mandatory £8 British Triathlon Race Pass)

*ResultsBase booking fee applies.

Why HeatWave?

✅ Pool swim – no open water worries
✅ Fast, flat run course
✅ Friendly, professionally organised event
✅ Suitable for all abilities
✅ Beautiful coastal location
✅ Hosted by Tuff Fitty Triathlon Club

Can you beat your Frosty time?

Join us this July and find out.

This event is proudly sponsored by

THE RACES

We offer two distances:

• The HeatWave:      800m pool swim and 10k run – Minimum age for participation is 17
• The MicroWave:  400m pool swim and 5k run – Minimum age for participation is 16

Entries will be available online only – no on-the-day entry. The closing date for entries is Sunday, 28th June 2026.

The entry fee for both races are the same.

• £35* for BTF members
• £43* for non-BTF members, which includes the £8 purchase of a British Triathlon Race Pass

(* excludes ResultsBase registration fee)

The entry fee for both races is the same, but if you are not a member of the British Triathlon Federation (BTF), you must purchase a British Triathlon Race Pass, which costs £8, providing relevant insurance. The link to purchase a race pass will be provided upon entry.  Their full terms and conditions for Race Pass are shown here. People who are not UK residents will need to purchase their own insurance through their home country federation or personal insurance provider.

Alongside your entry fee, we are asking whether you would like to make a small donation to Cancer United, a local cancer charity, a cause close to our members’ hearts and continues to be our club’s designated charity.

Registration is at 6.10am with the first wave of the HeatWave setting off at 7.00am. The swim is in a 25m Pool and we have experienced lane counters to count your lengths. The run is well marshalled and takes in a circuit around the local boating lake before heading along the seafront promenade. The course is flat and, if your training has gone well and the weather is kind, fast. Individual and team winners are usually announced and presented with their prizes at around 10.30am.

There is a range of individual prizes for both race distances. Both events, also have a team event. The full list of prizes are as follows,

MicroWave individual prizes

• 1^st 2nd, 3rd Female category
• 1^st 2nd, 3rd Open category
• 1^st Female category junior (up to 17)
• 1^st Open category junior (up to 17)
• 1^st Female category Vet (over 40)
• 1^st Open category Vet (over 40)
• 1^st Female category Supervet (over 50)
• 1^st Open category Supervet (over 50)
• 1^st Female category Vintage (over 60)
• 1^st Open category Vintage (over 60)

HeatWave individual prizes   

• 1^st, 2^nd, 3^rd Female category
• 1^st, 2^nd, 3^rd Open category
• 1^st Female category Vet (over 40)
• 1^st Open category Vet (over 40)
• 1^st Female category Supervet (over 50)
• 1^st Open category Supervet (over 50)
• 1^st Female category Vintage (over 60)
• 1^st Open category Vintage (over 60)

HeatWave & MIcroWave team prize (1^st prize only)

• Teams comprise four nominated members which must be mixed gender (at least one Female category and one Open category in each team). Each competitor enters and races individually and the four individual result are combined to produce an overall time.

By entering this Tuff Fitty Triathlon Club event, I agree to receive marketing emails about future events, training opportunities, and offers from Tuff Fitty Triathlon Club. I understand I can unsubscribe at any time by emailing heatwave@tufffittytri.club

Our Heat/MircoWave events comply with British Triathlon’s Transgender Policy (FRG029) which requires the following categories for Competitive Activities:

• Female category
• Open category

Only people who are the female sex at birth will be eligible to compete in the Female category.

Transgender (and all other individuals) will be eligible to compete in the Open category.

If you want to find out more, scroll down to see previous results, race reports and videos.

IMPORTANT:- There are no entries on the day, or transfer of entries. Unfortunately, no refunds are possible once the entry fee has been paid.

Race Instructions

• See HERE for HeatWave 2026 Race Instructions

Volunteering For the HeatWave

Please see here to find out more or sign up to volunteer.

Typical volunteering duties are from 6:30 am until 9:30 am.

Media

Whilst this year will be the inaugural HeatWave/MicroWave Aquathlons, the link below shows a video for its sister race, the Frosty Aquathlon. This will provide an overview of the course as the route is the same for both.