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Portsmouth in August
The weather in August
In August, Portsmouth averages daytime highs of 22° and night-time lows of 14° — mild weather by day. Expect around 50 mm of precipitation spread over about 11 wet days, with average cloud cover near 36%.
Temperatures are much the same as in July, and September is cooler again by about 2.4°. The sea averages 18°, bracing but swimmable.
August scores 71/100 — good conditions for sightseeing — and ranks 2nd of the twelve months for Portsmouth.
Around the middle of the month the sun rises at 05:52 and sets at 20:27 local time, giving 14 h 35 min of daylight. Days shorten by 104 minutes over the month.
Why 71/100?
How the score for August is builtBeach score this month: 37/100 (adds sea temperature and heat).
Comfort peaks for daytime highs between 18° and 25°C (64–77°F).
Festivals in the region in August
- Notting Hill CarnivalCarnivalKensington
- Reading and Leeds FestivalsMusic festivalReading
- CreamfieldsMusic festivalDaresbury
- Greenbelt FestivalMusic festivalWarkton
- Boardmasters FestivalMusic festivalPorth
Only the month is given: the exact dates change from year to year.
Around Portsmouth this month
United Kingdom's best in August
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Portsmouth in August: quick answers
Is August a good time to visit Portsmouth?
August scores 71/100 for Portsmouth, which we rate as good. Average highs are 22°C with 11 wet days.
How warm is Portsmouth in August?
Daytime highs average 22°C and night-time lows 14°C in August.
Does it rain a lot in Portsmouth in August?
Portsmouth receives about 50 mm of precipitation in August, falling on around 11 days.
Can you swim in Portsmouth in August?
The sea averages 18°C in August, cold for most swimmers.