Portsmouth weather in October 2025

Expect 30°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Portsmouth in October. Check more long-term weather averages for Portsmouth in October before you book your next holiday to Dominica in 2025/2026.

  • 30°C maximum daytime temperature in October in Portsmouth30
    30°C max day temperature
  • 7 hours of sunshine per day
  • 19 days with some rainfall in October in Portsmouth19
    19 days with some rainfall
  • 23°C minimum night-time temperature in October in Portsmouth23
    23°C min night temperature
  • 12 hours of daylight per day in October in Portsmouth12
    12 hours of daylight per day
  • High heat & humidity in October in PortsmouthH
    High heat & humidity
  • 279 mm monthly rainfall in October in Portsmouth279
    279 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in October in Portsmouth11
    11 (Extreme) UV index
  • 29°C sea temperature in October in Portsmouth29
    29°C sea temperature

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The October 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 October?

Daytime temperatures usually reach 30°C in Portsmouth in October with high heat and humidity, falling to 23°C at night.

How sunny is it in Portsmouth in October?

There are normally 7 hours of bright sunshine each day in Portsmouth in October - that's 61% of daylight hours.

How warm is the sea around Portsmouth in October?

The average sea temperature around Portsmouth in October is 29°C.

Does it rain in Portsmouth in October?

There are usually 19 days with some rain in Portsmouth in October and the average monthly rainfall is 279mm.

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

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

Portsmouth October sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 05:56 17:55
Thursday, 16th October 2025 05:58 17:44
Friday, 31st October 2025 06:02 17:37

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