Portsmouth weather in March 2026

Expect daytime maximum temperatures of 84°F 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 4.3 inches of rainfall in the month.

  • 84°F maximum daytime temperature in March in Portsmouth84
    84°F max day temperature
  • 8 hours of sunshine per day
  • 15 days with some rainfall in March in Portsmouth15
    15 days with some rainfall
  • 70°F minimum night-time temperature in March in Portsmouth70
    70°F 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
  • 4.3 inches monthly rainfall in March in Portsmouth4.3
    4.3 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in March in Portsmouth11
    11+ (Extreme) UV index
  • 79°F sea temperature in March in Portsmouth79
    79°F 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)  |  Imperial (°F)

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How hot is it in Portsmouth in March?

Daytime temperatures usually reach 86°F in Portsmouth in March with high heat and humidity, falling to 70°F 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 79°F.

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 3.7 inches.

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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