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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Southampton Wire weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The live forecast above shows the current conditions for Porthmadog. This harbour town on the Glaslyn estuary, backed by the Snowdonia mountains, sees a mix of Atlantic moisture and shelter from the north-westerlies, so expect typical coastal Welsh weather – often damp and breezy, but with mild spells between fronts.
What is the outlook for Porthmadog today and tomorrow?
The live forecast above gives you the high and low for today. Lying on the Llŷn Peninsula coast, Porthmadog can be cloudier than inland Gwynedd because of sea mist, but also warmer in winter. Tomorrow’s weather in Porthmadog often follows a pattern of early rain clearing to brighter intervals, so check the evening forecast for the next day.
How do the 7-day and 14-day forecasts look?
For the week ahead, the weather Porthmadog 7 days shows a typical Atlantic rhythm: rain bands followed by drier, cooler north-westerlies. If you’re after a longer view, the weather Porthmadog 14 day forecast from the Met Office indicates settled spells around mid-month, but keep an eye on the 10 Day Weather Forecast UK for updates. The bbc weather porthmadog 7 days service often highlights the same pattern.
Is it raining in Porthmadog tonight?
The live forecast above shows precipitation likelihood. Porthmadog sits in a rain-shadow from the Snowdon massif, but easterly winds can bring drizzle off the Irish Sea. Check the bbc weather porthmadog page for hour-by-hour rain radar.
What is the weather Porthmadog 21 days from now?
Long-range forecasts (21 days) are uncertain, but the Met Office’s monthly outlook suggests a weak signal for above-average rainfall for the Welsh coast. The weather Porthmadog 21 days trend can change quickly – check the Southampton Wire UK weather hub for updates.
How does Porthmadog compare with the rest of Gwynedd?
The town is often milder than inland valleys like Blaenau Ffestiniog, thanks to the sea. However, it can be cloudier than Liverpool Weather (across the Irish Sea) because of orographic lift. The Met Office’s weather porthmadog 7 days forecast is the best local guide.