Portsmouth Weather in August

Portsmouth in August sees pleasant daytime temperatures of 21°C (70°F) and nighttime lows of 15°C (59°F). Rainfall is fairly high this month at around 68 mm (2.7 in), so pack a rain jacket to stay dry.

Rainfall in Portsmouth in August

The climate data from previous years indicates about 11 days of rain, averaging 68 mm (2.7 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Portsmouth in August

August is one of the better months to visit Portsmouth. Expect 21°C (70°F) during the day and 15°C (59°F) at night. August is known for being in the summer season. The difference between afternoon and evening temperatures is usually noticeable. With overnight lows of 15°C (59°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. On average, it sees the highest temps of the year.

Sunshine in Portsmouth in August

The city usually sees around 208 hours of sunlight, indicating many sunny days — a great month for sightseeing.

If you're a fan of comfortable temperatures and drier conditions, August is a great time to visit.

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For a detailed overview over the year and the best time to visit the United Kingdom, check out our Portsmouth's climate page.

Portsmouth Temperature in August

Min Temperature 15°C (59°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 35%  

Precipitation 68 mm (2.7 in)  

Rainy days 11 days  

Humidity 76% *  

Sunshine 208 hours *  

Percentage Sunshine 46% *  

* Data from: Southampton, the United Kingdom (25 KM, 15 Miles).

What to Wear in Portsmouth in August

Comfortable temperatures call for an easy wardrobe in August. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Portsmouth in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

10/10

Walking

10/10

Barbeque

8/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Portsmouth's climate page.

More climate data for Portsmouth

Temperature Rainfall Sunshine Humidity

See the full Portsmouth climate overview or explore weather in the United Kingdom.