| Sat May 18 | Sun May 19 | Mon May 20 | Tue May 21 | |
| Turf condition | wet | damp | dry | dry |
| a.m. | ||||
| p.m. | ||||
| Tmin 18-06 |
7°C | 5°C | 5°C | 7°C |
| Tmax 06-18 |
9°C | 16°C | 16°C | 14°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 In the next few days, it's partly cloudy. Rain is not expected this day. With a high around 15 degrees it's mild. |