Guernsey weather in May 2025

Expect 15°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Guernsey in May. Check more long-term weather averages for Guernsey in May before you book your next holiday to Guernsey in 2025/2026.

  • 15°C maximum daytime temperature in May in Guernsey (St Peter Port)15
    15°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in May in Guernsey (St Peter Port)13
    13 days with some rainfall
  • 9°C minimum night-time temperature in May in Guernsey (St Peter Port)9
    9°C min night temperature
  • 15 hours of daylight per day in May in Guernsey (St Peter Port)15
    15 hours of daylight per day
  • No heat & humidity in May in Guernsey (St Peter Port)0
    No heat & humidity
  • 48 mm monthly rainfall in May in Guernsey (St Peter Port)48
    48 mm of monthly rainfall
  • UV (maximum) index 6 (High) in May in Guernsey (St Peter Port)6
    6 (High) UV index
  • 11°C sea temperature in May in Guernsey (St Peter Port)11
    11°C sea temperature

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The May weather guide for Guernsey, represented by St Peter Port, (St Peter Port) 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 warm is it in Guernsey in May?

Daytime temperatures usually reach 15°C in St Peter Port, Guernsey in May, falling to 9°C at night.

How sunny is it in Guernsey in May?

There are normally 8 hours of bright sunshine each day in St Peter Port, Guernsey in May - that's 50% of daylight hours.

Is the sea cold around Guernsey in May?

The average sea temperature around St Peter Port, Guernsey in May is 11°C.

Does it rain in Guernsey in May?

There are usually 13 days with some rain in St Peter Port, Guernsey in May and the average monthly rainfall is 48mm.

Guernsey May sunrise & sunset times

Browse the sunrise and sunset times for Guernsey in May 2025. Select a month to view Guernsey sunrise and sunset times for the next 12 months. The Guernsey sunrise and sunset times shown below are for St Peter Port.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:48 19:28
Friday, 16th May 2025 04:25 19:49
Saturday, 31st May 2025 04:09 20:07

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