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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the BritView weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above before heading out in Caernarfon – the town’s coastal position and proximity to Snowdonia can shift conditions quickly, so it’s worth a quick glance to plan your day.
What should you expect from today’s weather in Caernarfon?
The live forecast above gives you the clearest picture for Caernarfon right now. As a seaside town on the Menai Strait, it often sees a breeze off the water, with cloud rolling in from the Irish Sea. Morning mist can linger, especially in autumn, but the afternoon often brightens. Keep an eye on the live data for rain bands – they can arrive faster than you’d think.
Can you trust the 10-day or 14-day forecast for Caernarfon?
Longer-range outlooks, such as the weather in Caernarfon 10 days ahead or the 14 day weather forecast Caernarfon, give a useful trend but become less reliable as you go further out. BBC weather Caernarfon 14 days and BBC weather Caernarfon 7 days both offer a solid guide for general patterns – expect changeable conditions typical of north-west Wales. For trip planning, the 7-day view is your best bet.
Does it rain a lot in Caernarfon?
Yes, Caernarfon receives above-average rainfall for the UK, especially from autumn through early spring. The mountains to the east trap moisture, so showers are common. A waterproof jacket is a wise companion year-round.
When is the best time to visit Caernarfon for good weather?
Late spring (May–June) and early autumn (September) tend to be driest and mildest, with more settled spells. July and August are warmest but also busier, and can still see scattered showers.
Where can I find severe weather warnings for Caernarfon?
The Met Office issues warnings for wind, rain and snow. Check their website or the live forecast above – if a warning is active for Gwynedd, it will appear in the forecast details.
For a broader look at conditions across the country, head to our UK weather hub or check the 10-day forecast for the UK to see how Caernarfon compares with elsewhere.