Porthmadog weather
Live weather for Porthmadog on the Gwynedd coast — temperature, wind, rain chance, sunrise, sunset and an hourly forecast.
Porthmadog is 10°C and partly cloudy, calm at 1.6 mph NNW. A small chance of showers. High 12°, low 9°.
Next hours
How reliable is this forecast?
The forecast comes from the Met Office
The Porthmadog forecast comes from the Met Office, the UK's national weather service, and we refresh it every three hours. Weather is a forecast rather than a certainty, so today and tomorrow are the most reliable and the outlook can shift as each day gets closer.
Where the data comes from
Weather data is supplied by the Met Office. For official weather warnings, check the Met Office directly.
Visiting Porthmadog?
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About Porthmadog weather
Porthmadog sits on the estuary of the Glaslyn river with Snowdonia rising immediately behind. The mountains squeeze extra rain out of westerly weather systems, so Porthmadog tends to be wetter than the North Wales coast further east.
Porthmadog weather — FAQ
How often is the Porthmadog forecast updated?
The Porthmadog forecast on this page refreshes several times a day from the Met Office. The "last updated" time at the bottom of the page shows exactly when it was last pulled.
Are the times shown in GMT or BST?
All times on the page — including sunrise, sunset and the hourly forecast — are shown in UK local time (GMT in winter, BST in summer).
What does the rain-chance percentage mean?
It's the probability of at least a small amount of rain falling during that hour. A reading of 30% means roughly a one-in-three chance of some rain, not that it'll rain 30% of the time.
Where does the weather data come from?
Directly from the UK Met Office site-specific forecast for Porthmadog. We don't blend or interpret it — you're seeing the same underlying figures the Met Office publishes.
How reliable is this forecast?
The Porthmadog forecast comes from the Met Office, the UK's national weather service, and we refresh it every three hours. Weather is a forecast rather than a certainty, so today and tomorrow are the most reliable and the outlook can shift as each day gets closer.
Where does the weather data come from?
Weather data is supplied by the Met Office. For official weather warnings, check the Met Office directly.