St Peter Port weather in August 2025

Expect 20°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in St Peter Port in August. Check more long-term weather averages for St Peter Port in August before you book your next holiday to Guernsey in 2025/2026.

  • 20°C maximum daytime temperature in August in St Peter Port20
    20°C max day temperature
  • 7 hours of sunshine per day
  • 11 days with some rainfall in August in St Peter Port11
    11 days with some rainfall
  • 14°C minimum night-time temperature in August in St Peter Port14
    14°C min night temperature
  • 14 hours of daylight per day in August in St Peter Port14
    14 hours of daylight per day
  • No heat & humidity in August in St Peter Port0
    No heat & humidity
  • 45 mm monthly rainfall in August in St Peter Port45
    45 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in St Peter Port6
    6 (High) UV index
  • 17°C sea temperature in August in St Peter Port17
    17°C sea temperature

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The August 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 hot is it in St Peter Port in August?

Daytime temperatures usually reach 20°C in St Peter Port in August, falling to 14°C at night.

How sunny is it in St Peter Port in August?

There are normally 7 hours of bright sunshine each day in St Peter Port in August - that's 52% of daylight hours.

How warm is the sea around St Peter Port in August?

The average sea temperature around St Peter Port in August is 17°C.

Does it rain in St Peter Port in August?

There are usually 11 days with some rain in St Peter Port in August and the average monthly rainfall is 45mm.

St Peter Port August sunrise & sunset times

Browse the sunrise and sunset times for St Peter Port in August 2025. Select a month to view St Peter Port sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:42 19:50
Saturday, 16th August 2025 05:03 19:25
Sunday, 31st August 2025 05:25 18:55

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