Portsmouth
August
Weather in Portsmouth for August 2025
Your guide to Portsmouth weather in August - trends and predictions
In general, the average temperature in Portsmouth at the beginning of August is 19.7 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 19 °C by the end of August.
The climate of Portsmouth in August is notably wet, with an average of 11 rainy days, and a total of 55.8 mm of precipitation.
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Temperatures
Rain 🌧️
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20
Dry days
11
Rainy days
0
Snow days
20°/15°
Temperatures
27 km/h
Avg max wind
77 %
Avg humidity
Portsmouth in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  22° | 2 20° | 3 21° | ||||
| 4  18° | 5 19° | 6 19° | 7 19° | 8 19° | 9 21° | 10  21° |
| 11 21° | 12 21° | 13 19° | 14  20° | 15 19° | 16 21° | 17 21° |
| 18 21° | 19 19° | 20 20° | 21  19° | 22 20° | 23 21° | 24 20° |
| 25  18° | 26 19° | 27 19° | 28 20° | 29 19° | 30  19° | 31  19° |
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Temperatures trend during August in Portsmouth
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Moderate rain at times | 22° /16° | 3.2 mm | 5 | |
| 2 Aug. | Moderate or heavy rain shower | 20° /15° | 5.2 mm | 5 | |
| 3 Aug. | Moderate rain at times | 21° /14° | 1.8 mm | 5 | |
| 4 Aug. | Patchy rain possible | 18° /12° | 0.1 mm | 5 | |
| 5 Aug. | Moderate or heavy rain shower | 19° /14° | 4.2 mm | 5 | |
| 6 Aug. | Patchy rain possible | 19° /13° | 1.1 mm | 5 | |
| 7 Aug. | Patchy rain possible | 19° /13° | 0.3 mm | 4 | |
| 8 Aug. | Patchy rain possible | 19° /13° | 0.7 mm | 4 | |
| 9 Aug. | Patchy rain possible | 21° /15° | 0.2 mm | 6 | |
| 10 Aug. | Partly cloudy | 21° /16° | 0 mm | 6 | |
| 11 Aug. | Patchy rain possible | 21° /17° | 0.3 mm | 6 | |
| 12 Aug. | Patchy rain possible | 21° /16° | 0.9 mm | 5 | |
| 13 Aug. | Patchy rain possible | 19° /15° | 0.2 mm | 5 | |
| 14 Aug. | Heavy rain at times | 20° /15° | 2.9 mm | 5 | |
| 15 Aug. | Patchy rain possible | 19° /14° | 0.1 mm | 4 | |
| 16 Aug. | Patchy rain possible | 21° /15° | 0.7 mm | 5 | |
| 17 Aug. | Patchy rain possible | 21° /14° | 0.2 mm | 6 | |
| 18 Aug. | Heavy rain at times | 21° /15° | 4.3 mm | 6 | |
| 19 Aug. | Patchy rain possible | 19° /15° | 0.7 mm | 5 | |
| 20 Aug. | Patchy rain possible | 20° /15° | 1.9 mm | 5 | |
| 21 Aug. | Sunny | 19° /14° | 0 mm | 5 | |
| 22 Aug. | Patchy rain possible | 20° /16° | 0.5 mm | 5 | |
| 23 Aug. | Partly cloudy | 21° /15° | 0.7 mm | 5 | |
| 24 Aug. | Moderate or heavy rain shower | 20° /14° | 9.7 mm | 5 | |
| 25 Aug. | Cloudy | 18° /13° | 0.3 mm | 4 | |
| 26 Aug. | Light rain shower | 19° /14° | 1.4 mm | 4 | |
| 27 Aug. | Patchy rain possible | 19° /14° | 0.1 mm | 5 | |
| 28 Aug. | Patchy rain possible | 20° /14° | 0.1 mm | 5 | |
| 29 Aug. | Patchy rain possible | 19° /12° | 0.4 mm | 5 | |
| 30 Aug. | Overcast | 19° /12° | 0.2 mm | 5 | |
| 31 Aug. | Moderate rain | 19° /13° | 13.6 mm | 5 | |
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Important Notice
Our weather forecast for Portsmouth 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 Portsmouth forecast closer to your planned date for the most up-to-date weather information.
Portsmouth in August - FAQ
What are the expected maximum and minimum temperatures in Portsmouth during August?
During August, expect a variety of temperatures with highs around 20° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Portsmouth during August?
Moderate rainfall is anticipated in Portsmouth during August, with a total of 55.8 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Portsmouth during August?
The average wind speed in Portsmouth during August is 27 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Portsmouth
Explore the daily rainfall trends and prepare for Portsmouths August weather 💧
UV exposure in Portsmouth during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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