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Porthmadog Weather forecast
| Mo 06 | Tu 07 | We 08 | Th 09 | Fr 10 | Sa 11 | Su 12 | Mo 13 | |
| Tmax (°C) | 16 | 18 | 16 | 17 | 19 | 21 | 21 | 18 |
| Tmin (°C) | 8 | 9 | 9 | 9 | 10 | 10 | 12 | 11 |
| 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 |
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| Rain risk | 45 % | 35 % | 15 % | 25 % | 25 % | 55 % | 55 % | 40 % |
| Sunshine hours |  |
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| (hrs) | 1.5 | 3.1 | 1.5 | 0.8 | 0.8 | 4.7 | 3.1 | 3.2 |
| UV index | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 4 |
| Sunrise Sunset |
05:33 20:54 |
05:31 20:56 |
05:30 20:57 |
05:28 20:59 |
05:26 21:01 |
05:24 21:03 |
05:23 21:04 |
05:21 21:06 |
| Wind p.m. |  |
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| Bft | N 2 | W 1-2 | SW 2-3 | SW 2 | SW 2 | SW 1-2 | S 2 | NE 2 |
Last updated: Tue 07 May 06:05 NZST
| Nearby Forecast Locations - Porthmadog | Distance |
| Snowdonia | 15.0 km |
| Llyn Trawsfynydd | 15.0 km |
| Caernarfon | 19.3 km |
| Gwynedd | 21.7 km |
| Harlech | 22.4 km |
| Menai Bridge | 24.5 km |
| Barmouth | 31.6 km |
| Raf Mona | 33.7 km |
| Bala Lake | 33.9 km |
| Abersoch | 34.6 km |
| Conwy | 35.7 km |
| Bala | 36.4 km |
| Llyn Brenig | 39.0 km |
| Holyhead | 41.0 km |
| Llŷn Peninsula | 42.2 km |
| Llangollen | 45.0 km |
| Colwyn Bay | 45.8 km |
| Aberdaron | 49.9 km |
| Lake Vyrnwy | 49.9 km |
| Machynlleth | 54.2 km |
| Newtown | 77.5 km |
