Portsmouth weather in March 2026

Expect daytime maximum temperatures of 29°C in Portsmouth, Dominica in March based on long-term weather averages. There are 8 hours of sunshine per day on average with 15 days with some rainfall and typically 110 mm of rainfall in the month.

  • 29°C maximum daytime temperature in March in Portsmouth29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 15 days with some rainfall in March in Portsmouth15
    15 days with some rainfall
  • 21°C minimum night-time temperature in March in Portsmouth21
    21°C min night temperature
  • 12 hours of daylight per day in March in Portsmouth12
    12 hours of daylight per day
  • Moderate heat & humidity in March in PortsmouthM
    Moderate heat & humidity
  • 110 mm monthly rainfall in March in Portsmouth110
    110 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in March in Portsmouth11
    11+ (Extreme) UV index
  • 26°C sea temperature in March in Portsmouth26
    26°C sea temperature

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The March 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 March?

Daytime temperatures usually reach 30°C in Portsmouth in March with high heat and humidity, falling to 21°C at night.

How sunny is it in Portsmouth in March?

There are normally 8 hours of bright sunshine each day in Portsmouth in March - that's 63% of daylight hours.

How warm is the sea around Portsmouth in March?

The average sea temperature around Portsmouth in March is 26°C.

Does it rain in Portsmouth in March?

There are usually 15 days with some rain in Portsmouth in March and the average monthly rainfall is 93mm.

Portsmouth March sunrise & sunset times

Browse the sunrise and sunset times for Portsmouth in March 2026. Select a month to view Portsmouth sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st March 2026 06:23 18:13
Monday, 16th March 2026 06:13 18:16
Tuesday, 31st March 2026 06:02 18:18

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