AppDownload the TriSwim app on iPhone & Android for a quicker, easier booking experience and bonus features.

Open water booking

Book a swim.

Safe, lifeguarded open water swimming across three beautiful venues in Kent and Sussex — open to members and non-members alike.

Book your open water swims here

Choose your session.

Pick a venue and time from the live timetable, then pay online. Booking takes about two minutes.
powered by Glofox

First time?

Your first swim, demystified.

If you've never swum in a lake before, start here — then book a beginner-friendly session at Haysden.
01

No experience needed

Our beginner sessions start in shallow, shoulder-depth water with a coach beside you. You can float, stand or swim — entirely your pace.

02

What to bring

Swimwear, a towel, a bright swim hat and a warm layer for afterwards. Wetsuits are available to hire at most venues.

03

Safety comes first

Every session is lifeguarded from the shore and the water, with marked loops and a full briefing before you get in.

Book my first swim →
Open water swimming at a TriSwim lake

What to expect

Every swim is lifeguarded.

  • · Trained safety cover on the water and on shore
  • · Warm-up briefing before every session
  • · Marked loops from 400m up to 1.5km
  • · Hot drinks, changing areas and secure parking
Reserve a slot →

Booking FAQs

Questions, answered.

Do I need to be a member to book?+

No. Every session is open to non-members — members simply pay a lower per-swim rate and get earlier access to the timetable.

Do I need a wetsuit?+

Not always. Wetsuits are recommended when the water is below roughly 15°C and are available to hire at most venues. Skins swimmers are welcome in warmer months.

I'm a complete beginner — is this for me?+

Absolutely. A large number of our swimmers started as nervous beginners. Book a beginner-friendly session at Haysden and let us know when you arrive.

How early should I arrive?+

Aim for 15–20 minutes before your slot so there's time to register, change and take part in the safety briefing.

What if the weather is bad?+

We swim in most conditions, but sessions are cancelled if there's lightning or unsafe water quality. You'll be notified and offered a transfer or refund.

Can I cancel or move my booking?+

Yes — bookings can be changed through the booking portal up to a set cut-off before your session.

Ready when you are

Book your next swim in under two minutes.

Book a swim →Join