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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the NewsPrism weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
For the most accurate and up-to-date conditions in Criccieth, refer to the live forecast above, which provides a reliable snapshot for planning your day on the Llyn Peninsula.
What is the typical weather pattern for Criccieth?
Criccieth experiences a mild maritime climate, with the Irish Sea moderating extreme temperatures throughout the year. Conditions can change rapidly, especially along the coast, where sea breezes and incoming weather fronts bring frequent cloud and showers.
- Winters are cool and wet, with average highs around 8-9°C; gales are possible along the exposed seafront.
- Summers are generally mild, rarely exceeding 20°C, with the best sunshine often in late spring.
- Rainfall is spread across the year, with autumn and winter being the wettest seasons due to Atlantic low-pressure systems.
- The microclimate near the castle headland can differ slightly from inland areas, with sea fog (haar) occasionally affecting visibility.
How reliable are the 7-day and 14-day forecasts?
Short-term forecasts for the coming 3-4 days are typically reliable for general conditions, but longer-range outlooks carry increased uncertainty due to local coastal influences. For the most dependable planning, combine the bbc weather criccieth 7 days view with the met office weather criccieth updates, which factor in coastal winds and tidal effects.
- A 5-day forecast is generally accurate for temperature trends and rain timing; beyond that, confidence decreases.
- The bbc weather criccieth 14 days outlook is best treated as a broad trend indicator, not a day-by-day certainty.
- Frequent checks are advisable if you are planning outdoor activities, as weather systems can shift quickly over Cardigan Bay.
Frequently Asked Questions
When is the best time to visit Criccieth for good weather?
Late May to early July offers the highest chance of dry, mild days and lighter winds. The town is quieter before the school holidays, and sea temperatures are beginning to warm up.
Is the weather in Criccieth very different from the rest of Gwynedd?
It can be slightly milder in winter due to the sea, but the coastline often sees more cloud and stronger winds than inland valleys like the nearby Glaslyn or Dwyryd estuaries.
Where can I find the latest Met Office forecast for Criccieth?
The met office weather criccieth page on the official site gives detailed breakdowns including tide times and UV index, which is useful for coastal walks and beach visits.
For a broader view of conditions across the nation, see our UK weather hub or the 10 Day Weather Forecast UK. You can also compare Criccieth’s coastal climate with Bristol Weather or Liverpool Weather.