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Caernarfon weather in August 2026
Expect daytime maximum temperatures of 18°C in Caernarfon, Wales in August based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall and typically 131 mm of rainfall in the month.
- 18°C max day temperature
18 - 5 hours of sunshine per day
- 15 days with some rainfall
15 - 11°C min night temperature
11 - 15 hours of daylight per day
15 - No heat & humidity
0 - 131 mm of monthly rainfall
131 - 5 (Moderate) UV index
5 - 16°C sea temperature
16
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Recommended for Wales
The August weather guide for Wales (Caernarfon) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Wales
How hot is it in Caernarfon in August?
Daytime temperatures usually reach 18°C in Caernarfon in August, falling to 11°C at night.
How sunny is it in Caernarfon in August?
There are normally 5 hours of bright sunshine each day in Caernarfon in August - that's 36% of daylight hours.
How warm is the sea around Caernarfon in August?
The average sea temperature around Caernarfon in August is 16°C.
Does it rain in Caernarfon in August?
There are usually 15 days with some rain in Caernarfon in August and the average monthly rainfall is 131mm.
Caernarfon August sunrise & sunset times
Browse the sunrise and sunset times for Caernarfon in August 2026. Select a month to view Caernarfon sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Saturday, 1st August 2026 | 04:34 | 20:12 |
| Sunday, 16th August 2026 | 04:59 | 19:42 |
| Monday, 31st August 2026 | 05:25 | 19:09 |
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