| Sat May 25 | Sun May 26 | Mon May 27 | Tue May 28 | |
| Tmin 18-06 |
3°C | 2°C | 4°C | 6°C |
| Tmax 06-18 |
13°C | 14°C | 11°C | 11°C |
| morning 24-06 |
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| a.m. 06-12 |
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| p.m. 12-18 |
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| evening 18-24 |
| Nearby Forecast Locations - Llyn Trawsfynydd | Distance |
| Gwynedd | 7.5 km |
| Porthmadog | 15.0 km |
| Harlech | 16.6 km |
| Bala Lake | 21.3 km |
| Barmouth | 21.9 km |
| Snowdonia | 22.3 km |
| Bala | 24.6 km |
| Forecast: Llyn Trawsfynydd Region While on Sunday it is still clear, the two following days it becomes considerable cloudiness. On Tuesday there will be showers, on Monday it will be raining at times. The maximum temperature lies around 12 degrees. |