| Sat May 18 | Sun May 19 | Mon May 20 | Tue May 21 | |
| Tmin 18-06 |
2°C | 6°C | 6°C | 7°C |
| Tmax 06-18 |
10°C | 16°C | 16°C | 16°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 - Barmouth | Distance |
| Harlech | 10.3 km |
| Gwynedd | 15.8 km |
| Llyn Trawsfynydd | 21.9 km |
| Machynlleth | 28.0 km |
| Forecast: Barmouth Region In the next few days, some sunny spells. But Sunday some rain is to be expected. With a high around 16 degrees it's mild. |