Portsmouth weather in March 2026

Q: How warm is it in Portsmouth in March?

Daytime temperatures usually reach 10°C in Portsmouth in March, falling to 4°C at night.

Q: How sunny is it in Portsmouth in March?

There are normally 4 hours of bright sunshine each day in Portsmouth in March - that's 35% of daylight hours.

Q: Is the sea cold around Portsmouth in March?

The average sea temperature around Portsmouth in March is 7°C.

Q: Does it rain in Portsmouth in March?

There are usually 14 days with some rain in Portsmouth in March and the average monthly rainfall is 60mm.

Expect daytime maximum temperatures of 50°F in Portsmouth, England in March based on long-term weather averages. There are 4 hours of sunshine per day on average with 14 days with some rainfall and typically 2.4 inches of rainfall in the month.

50
50°F max day temperature
4
4 hours of sunshine per day
14
14 days with some rainfall
39
39°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
2.4
2.4 inches of monthly rainfall
3
3 (Moderate) UV index
45
45°F sea temperature

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The March 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)