Open Water Swimming

Supervised open water swimming sessions designed to give you the opportunity to build your confidence and improve your technique, with full safety boat cover.


Open Water Swimming | Plas y Brenin

Open Water Swimming lessons in the fresh, clean waters of Llynnau Mymbyr, with the spectacular backdrop of the Snowdon Horseshoe.

Build your confidence and technique.


Thursday Night Open Water Swimming 

Supervised Open Water Swimming at Plas y Brenin on Thursday evenings between 22nd of July and 25th of August.

Who: for competent swimmers who can comfortably swim 400m.

These sessions are not suitable for beginners.

18:30 – 20:00 (but please arrive at least 15 minutes before the session).

Please bring…

  • Wetsuit
  • Goggles
  • Swimming cap
  • Towel

Saturday 17th of July | Open Water Coaching

Saturday sessions cost £35 and include two hours of open water coaching with safety boat cover.

Fully qualified Open Water Swimming coaches.

Each date has two available sessions:

  • Beginner: 10am-12pm
  • Intermediate: 1.30pm-3.30pm.

Beginner morning sessions are suitable for confident pool swimmers – all participants must be able to swim at least 100 meters in a pool.

Intermediate afternoon sessions are for swimmers with experience of open water swimming who wish to improve endurance and technique with supervision and coaching.

New dates are coming soon; watch this space!

All participants should arrive at least 15 minutes before the start of their session, and bring:

  • A wetsuit (this will be optional if the water temperature is above 18 degrees).
  • Goggles
  • Swimming cap
  • Towel

Using the lake at Plas y Brenin

Please note that anybody using the lake for any purpose in their own time does so entirely at their own risk. Please see our dedicated webpage for more information:

More Info