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CST Experiences

Swimming at Trevassack Lake

water temperature Tuesday 21st May 2024
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Drop In Swim Sessions:

One price for any length of swim, whether you want to dip your toes or train for a triathlon – there will be a swim route covering over half the lake (not behind the island) as well as the usual cordoned ‘dip zone’.

Please note, the distance available to swim around the lake may vary according to weather and staff availability.


Fridays 9:00am to 10:00am
Tuesdays 9:00am to 10:00am
Sundays 9:00am to 10:30am

  • All participants must be 8 years or over
  • All U12s must be accompanied in the water by an appropriate adult. All U18s must be supervised by an appropriate adult on site

As a Non-Profit organisation, we need 30 members in order to commit to keeping the swim sessions open for the season


We now have a flexible membership offering of 3 different variants so you can pick which best suits!

> Single – one swim a week, any session

> 2 Day – two swims a week, any sessions

> 3 Day – you guessed it, three swims a week, all sessions! This offers the best value for money.

  • Friday 3 May 2024 up to and including Tuesday 30th July 2024 
  • Distance lake swimming as well as the ‘dip zone’
  • Free entry to any CST organised swim events
  • Early bird tickets for other events at Trevassack Lake (ticket availability before general release)


£54.60 (Single)

£78 (2 Day)

£113 (3 Day)

We’re so thankful to our members, who keep our swim sessions afloat with their commitment to cold water swimming

NEW - Friday morning swims!

For the next few weeks we are trialling Friday morning swims – by popular request!
Hopefully we get lots of swimmers and we can keep this slot open through the summer 🤞

Fridays 9:00am to 10:00am

Tuesdays 9:00am to 10:00am

Sundays 9:00am to 10:30am


Lake Dip PLUS Polar Bear Challenge

In addition to the gentle, open water dip zone, we’ve set up a separate 125 metre course, perfect for those participating in the Polar Bear and Penguin challenges.

Conquer the Polar Challenge course and bask in the camaraderie of the Lake Dip, as we make sure you get everything you need from your swim.

It’s the ultimate cold-water plunge!


Sunday Swim Spectacle

The winter chill won’t stop us – Dip, Go Polar or… Brave the Buoys!

On Sunday mornings, join us for an epic Lake Swim adventure as we brave the elements.

Just like Tuesdays you can choose to Dip in the usual zone, or take on the Polar Challenge course, but on Sundays, the intrepid among you are also welcome to train by swimming the Yellow Buoy course – as long as the weather and spirit of our swimmers allow.

A group of swimmers in wetsuits and yellow swimming caps prepare to Lap the Lake

Other swim opportunities

We have other companies come and make use of our lake for their water-based sessions – please contact them direct if you are interested in any of the below:

Swimming on Mondays with Beyond the Wave

Monday Evening Swims | Beyond the Wave

A casual evening swim with a warm up drink included afterwards OR swim coaching with a cuppa.

We’ve been working with Beyond the Wave for a while now so are pleased to have them back to offer their evening swim slot, from learning to swim from scratch, to improving technique, or just a swim and a social – with hot drinks and biscuits included!


Mondays 18:00 – 19:30

Contact Beyond the Wave direct to book

Private Swim Lessons

Coached, specialised open water sessions are available through one of our partners:

Beyond the Wave CIC 

SureSwim Kernow 

Momentum Coaching

(Please contact your preferred coach directly)

Coached swim session in Trevassack Lake with CST Experiences

They cater for all swimmers from beginners to established competitors. 

They can provide 1:1 – 1:2 or group coached sessions to improve open water swimming technique and stamina at Trevassack Lake.

Quick dip swimming in Trevassack Lake with CST Experiences
Swim around Trevassack Lake with CST Experiences

If you have an open-water swim group, get in touch to chat about how we can welcome you to Trevassack Lake.

Lake Swimming

With its sheltered, peaceful location and clean, fresh water, Trevassack Lake is lovely for open water swimming, all year round.

Whether you’re a recent chlorine convert or have plenty of experience in Cornwall’s wild waterways, we’d love to welcome you to Trevassack Lake. Whilst in the water, marked areas will guide you to swim where suitable for your session, be it a quick dip or triathlon training around the lake’s edge. 

We have changing rooms, warm showers and toilets available for use, included in your price. The waterside cafe is perfect for warming up with a coffee and cake after your swim!

By swimming at Trevassack Lake, you’ll not only spend time immersed in nature, reaping the benefits that wild swimming can bring to your mental and physical health, you’ll also be supporting the work of Children’s Sailing Trust to create affordable and accessible watersports in Cornwall. 

Swimming at Trevassack Lake
Still calm blue backdrop for an accessible wedding