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Cornwall weather in August 2025
Expect 19°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Cornwall in August. Check more long-term weather averages for Cornwall in August before you book your next holiday to Cornwall in 2025/2026.
- 1919°C max day temperature
- 6 hours of sunshine per day
- 1515 days with some rainfall
- 1313°C min night temperature
- 1414 hours of daylight per day
- 0No heat & humidity
- 7272 mm of monthly rainfall
- 66 (High) UV index
- 1616°C sea temperature
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Expires at 23:59 on Tuesday 31st Dec 2024 · View all Luxury Cottages offers
The August weather guide for Cornwall (Newquay) 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.
Top Cornwall destinations
Below are average maximum temperatures at popular countries, regions and places in Cornwall in August. Select a holiday destination to see more weather parameters.
Metric (°C / mm) | Imperial (°F / inches)
More about the UK
How hot is it in Cornwall in August?
Daytime temperatures usually reach 19°C in Newquay, Cornwall in August, falling to 13°C at night.
How sunny is it in Cornwall in August?
There are normally 6 hours of bright sunshine each day in Newquay, Cornwall in August - that's 43% of daylight hours.
How warm is the sea around Cornwall in August?
The average sea temperature around Newquay, Cornwall in August is 16°C.
Does it rain in Cornwall in August?
There are usually 15 days with some rain in Newquay, Cornwall in August and the average monthly rainfall is 72mm.
Cornwall August sunrise & sunset times
Browse the sunrise and sunset times for Cornwall in August 2025. Select a month to view Cornwall sunrise and sunset times for the next 12 months. The Cornwall sunrise and sunset times shown below are for Newquay.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Friday, 1st August 2025 | 04:48 | 20:04 |
Saturday, 16th August 2025 | 05:11 | 19:37 |
Sunday, 31st August 2025 | 05:33 | 19:07 |
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