Cornwall (Newquay)
August
Weather in Cornwall for August 2026
Your guide to Cornwall weather in August - trends and predictions
The forecast for the next days in Cornwall predicts temperatures to be around 20 °C, close to the historical average.
In general, the average temperature in Cornwall at the beginning of August is 18.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 17.6 °C by the end of August.
The climate of Cornwall in August is notably wet, with an average of 14 rainy days, and a total of 44.6 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
14
Rainy days
0
Snow days
18°/15°
Temperatures
26 km/h
Avg max wind
79 %
Avg humidity
Cornwall Weather August
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Temperatures trend during August in Cornwall
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August weather in Cornwall day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. |  Patchy rain possible | 18° /14° | 0.2 mm | 6 | |
| 2 Aug. | Patchy rain possible | 20° /13° | 0.2 mm | 5 | |
| 3 Aug. | Patchy rain possible | 20° /14° | 0.4 mm | 5 | |
| 4 Aug. | Patchy rain possible | 19° /14° | 0.7 mm | 5 | |
| 5 Aug. | Patchy rain possible | 18° /16° | 1.8 mm | 6 | |
| 6 Aug. | Patchy rain possible | 18° /15° | 0.5 mm | 5.7 | |
| 7 Aug. |  Sunny | 19° /14° | 0 mm | 5 | |
| 8 Aug. |  Partly cloudy | 21° /14° | 0 mm | 6 | |
| 9 Aug. | Sunny | 20° /15° | 0 mm | 6 | |
| 10 Aug. | Sunny | 19° /16° | 0 mm | 5 | |
| 11 Aug. | Sunny | 20° /14° | 0 mm | 6 | |
| 12 Aug. | Sunny | 23° /16° | 0 mm | 6 | |
| 13 Aug. | Sunny | 23° /16° | 0 mm | 6 | |
| 14 Aug. | Sunny | 22° /18° | 0 mm | 6 | |
| 15 Aug. | Sunny | 21° /17° | 0 mm | 6 | |
| 16 Aug. | Partly cloudy | 20° /17° | 0.1 mm | 6 | |
| 17 Aug. | Patchy rain possible | 19° /16° | 0.1 mm | 5 | |
| 18 Aug. | Patchy rain possible | 18° /16° | 7.2 mm | 5 | |
| 19 Aug. | Light rain shower | 20° /15° | 4.9 mm | 5 | |
| 20 Aug. | Patchy rain possible | 18° /14° | 0.5 mm | 4 | |
| 21 Aug. | Patchy rain possible | 18° /14° | 0.3 mm | 4 | |
| 22 Aug. |  Cloudy | 18° /14° | 0.4 mm | 4 | |
| 23 Aug. | Partly cloudy | 19° /14° | 1.2 mm | 5 | |
| 24 Aug. | Cloudy | 18° /13° | 5.9 mm | 5 | |
| 25 Aug. | Patchy rain possible | 18° /13° | 1.6 mm | 5 | |
| 26 Aug. | Light rain shower | 18° /13° | 2.1 mm | 4 | |
| 27 Aug. | Light rain shower | 18° /14° | 3.2 mm | 4 | |
| 28 Aug. | Patchy rain possible | 17° /14° | 3 mm | 4 | |
| 29 Aug. | Patchy rain possible | 17° /14° | 2.1 mm | 4 | |
| 30 Aug. | Light rain shower | 17° /13° | 1.6 mm | 4 | |
| 31 Aug. | Light rain shower | 18° /14° | 7.2 mm | 4 | |
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Important Notice
Our weather forecast for Cornwall in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cornwall forecast closer to your planned date for the most up-to-date weather information.
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Cornwall in August - FAQ
What are the expected maximum and minimum temperatures in Cornwall during August?
During August, expect a variety of temperatures with highs around 18° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cornwall during August?
In August, Cornwall can expect light to moderate rainfall, totaling 44.6 mm across approximately 14 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Cornwall during August?
The average wind speed in Cornwall during August is 26 km/h, suggesting breezy to windy conditions, depending on your activities.
Cornwall water temperatures in August
The average water temperature of the Atlantic Ocean near Cornwall in August is 15.9 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Cornwall in August?
- The average water temperature in Cornwall in August is 15.9 °C.
- Can you swim in Cornwall in August?
- Brisk: quick dips and active swimming are fine, but pack a 2–3 mm spring suit if you plan longer sessions or early-morning outings.
August rainfall patterns in Cornwall
Explore the daily rainfall trends and prepare for Cornwalls August weather 💧
Typically, Cornwall has 14 rainy days in August with a total of 44.6 mm of rainfall.
UV exposure in Cornwall during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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