Portsmouth weather in May 2025

Expect daytime maximum temperatures of 61°F in Portsmouth, England in May based on long-term weather averages. There are 7 hours of sunshine per day on average with 12 days with some rainfall and typically 1.9 inches of rainfall in the month.

  • 61°F maximum daytime temperature in May in Portsmouth61
    61°F max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in May in Portsmouth12
    12 days with some rainfall
  • 46°F minimum night-time temperature in May in Portsmouth46
    46°F min night temperature
  • 16 hours of daylight per day in May in Portsmouth16
    16 hours of daylight per day
  • No heat & humidity in May in Portsmouth0
    No heat & humidity
  • 1.9 inches monthly rainfall in May in Portsmouth1.9
    1.9 inches of monthly rainfall
  • UV (maximum) index 6 (High) in May in Portsmouth6
    6 (High) UV index
  • 54°F sea temperature in May in Portsmouth54
    54°F sea temperature

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The May weather guide for England (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)  |  Imperial (°F)

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More about England

How warm is it in Portsmouth in May?

Daytime temperatures usually reach 61°F in Portsmouth in May, falling to 46°F at night.

How sunny is it in Portsmouth in May?

There are normally 7 hours of bright sunshine each day in Portsmouth in May - that's 47% of daylight hours.

How warm is the sea around Portsmouth in May?

The average sea temperature around Portsmouth in May is 54°F.

Does it rain in Portsmouth in May?

There are usually 12 days with some rain in Portsmouth in May and the average monthly rainfall is 1.9 inches.

Portsmouth May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:38 19:26
Friday, 16th May 2025 04:14 19:49
Saturday, 31st May 2025 03:57 20:08

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