Cornwall weather in August 2025

Q: 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.

Q: 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.

Q: How warm is the sea around Cornwall in August?

The average sea temperature around Newquay, Cornwall in August is 16°C.

Q: 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.

Expect 66°F 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.

66
66°F max day temperature
6
6 hours of sunshine per day
15
15 days with some rainfall
55
55°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
2.8
2.8 inches of monthly rainfall
6
6 (High) UV index
61
61°F sea temperature

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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) | Imperial (°F)

More about the UK

How hot is it in Cornwall in August?

Daytime temperatures usually reach 66°F in Newquay, Cornwall in August, falling to 55°F 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 61°F.

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 2.8 inches.

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.

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