Portsmouth weather in July 2025

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Portsmouth in July. Check more long-term weather averages for Portsmouth in July before you book your next holiday to Dominica in 2025/2026.

  • 31°C maximum daytime temperature in July in Portsmouth31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 20 days with some rainfall in July in Portsmouth20
    20 days with some rainfall
  • 24°C minimum night-time temperature in July in Portsmouth24
    24°C min night temperature
  • 13 hours of daylight per day in July in Portsmouth13
    13 hours of daylight per day
  • High heat & humidity in July in PortsmouthH
    High heat & humidity
  • 156 mm monthly rainfall in July in Portsmouth156
    156 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in July in Portsmouth11
    11+ (Extreme) UV index
  • 28°C sea temperature in July in Portsmouth28
    28°C sea temperature

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The July weather guide for Dominica (Portsmouth) 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.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Portsmouth in July?

Daytime temperatures usually reach 31°C in Portsmouth in July with high heat and humidity, falling to 24°C at night.

How sunny is it in Portsmouth in July?

There are normally 8 hours of bright sunshine each day in Portsmouth in July - that's 58% of daylight hours.

How warm is the sea around Portsmouth in July?

The average sea temperature around Portsmouth in July is 28°C.

Does it rain in Portsmouth in July?

There are usually 20 days with some rain in Portsmouth in July and the average monthly rainfall is 156mm.

What is the chance of a hurricane in Portsmouth in July?

On average less than 1 day in July in Portsmouth is likely to be affected by the passage of one or more tropical storms.

Portsmouth July sunrise & sunset times

Browse the sunrise and sunset times for Portsmouth in July 2025. Select a month to view Portsmouth sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 05:39 18:41
Wednesday, 16th July 2025 05:43 18:41
Thursday, 31st July 2025 05:48 18:37

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