Updated
Editor's Notes
Llyn Cau is one of Wales's most dramatic glacial lakes, cupped in a near-perfect rock amphitheatre beneath the summit crags of Cadair Idris. The Minffordd Path climbs past it, and the deep blue tarn ringed by 300-metre cliffs is a highlight of the mountain.
lake in Wales
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Weather at Llyn Cau
42°F, Light drizzle · H 46° / L 38° · 91% chance of rain3-day forecast
H: 46° L: 38°
Light drizzle

42°
|
Feels like 34°
Precipitation
91%
Humidity
93%
Wind
17 mph
UV Index
0.5
Weather notes:
🏄Good for surfing/sailing🌧️Rain expected
12 AM

38°
3 AM

41°
6 AM

43°
9 AM

44°
12 PM

44°
3 PM

42°
6 PM

43°
9 PM

42°
Frequently asked questions
- Where is Llyn Cau?
- Llyn Cau is a lake in Wales.
- Can you swim at Llyn Cau?
- There is no fixed answer for Llyn Cau: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Llyn Cau in Wales. Check current water conditions before you go, and follow posted signs and local guidance.
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Location & Contact
Wales
🏞️ Best times & visiting tips
- ›Check for boat launch facilities and fees
- ›Obtain required fishing licenses before arrival
- ›Be aware of lake-specific regulations and restrictions
- ›Monitor water quality reports before swimming
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