Portsmouth weather in July 2025

Expect 28°C daytime maximum temperatures in the shade with on average 9 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 New Hampshire in 2025/2026.

  • 28°C maximum daytime temperature in July in Portsmouth28
    28°C max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in July in Portsmouth10
    10 days with some rainfall
  • 15°C minimum night-time temperature in July in Portsmouth15
    15°C min night temperature
  • 15 hours of daylight per day in July in Portsmouth15
    15 hours of daylight per day
  • Low heat & humidity in July in PortsmouthL
    Low heat & humidity
  • 77 mm monthly rainfall in July in Portsmouth77
    77 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in July in Portsmouth8
    8 (Very High) UV index
  • 17°C sea temperature in July in Portsmouth17
    17°C sea temperature

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The July weather guide for New Hampshire (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 28°C in Portsmouth in July with low heat and humidity, falling to 15°C at night.

How sunny is it in Portsmouth in July?

There are normally 9 hours of bright sunshine each day in Portsmouth in July - that's 62% of daylight hours.

How warm is the sea around Portsmouth in July?

The average sea temperature around Portsmouth in July is 17°C.

Does it rain in Portsmouth in July?

There are usually 10 days with some rain in Portsmouth in July and the average monthly rainfall is 77mm.

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 04:08 19:26
Wednesday, 16th July 2025 04:18 19:19
Thursday, 31st July 2025 04:33 19:05

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