Lake
Llyn Tarw
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One of three lakes in the hills above Caersws Llyn Tarw is the only swimming lake. Accessed via a bridle path signposted opposite Llyn Mawr nature reserve it is about a fifteen minute walk uphill. The farmer is happy with swimmers and SUP provided no rubbish is left and all gates are closed etc. The views are glorious. The lake has some reeds and the bottom is muddy. There is closer access via a farm track marked on the map which is bumpy, can be muddy with cows, a bull and a few gates.
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Plan your swim
Before you go
- Cold water shock is real. Enter slowly and control your breathing.
- Lake water can be much colder below the surface (thermocline)
- Stay close to shore until you know the conditions
- Watch for boat traffic and stay visible with a tow float
- Check for blue-green algae warnings before swimming
Conditions change fast. Always check the latest data, read recent community reports, and swim within your ability.
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Frequently asked questions
Is this lake safe for swimming?
Check the Conditions tab for surface state and wind conditions. Review the Quality tab if this is a designated bathing water. Always read recent community reports for local advice.
How cold is the water?
Check the Temperature tab for the current estimate and 7-day trend. Lakes hold heat longer than rivers but can develop a thermocline. The water below the surface can be dramatically colder.
What should I bring?
A tow float for visibility (especially important where boats operate), warm layers for after, and consider a wetsuit in colder months. Check for designated swimming areas.