St Peter Port weather

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The weather guide for St Peter Port, Guernsey shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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Which is the hottest month in St Peter Port?

The hottest time of year in St Peter Port is normally August. Expect maximum daytime temperatures to reach 20°C.

Which month has the most rain in St Peter Port?

In terms of rainfall, December is usually the wettest month in St Peter Port with 100mm on average. There are normally 19 days in December with some rain.

When is it sunniest in St Peter Port?

The sunniest time of year in St Peter Port is normally July with bright sunshine on average for 52% of daylight hours; that's 8 hours of sunshine per day.

When is the sea warmest in St Peter Port?

The sea is usually at its warmest in St Peter Port in August when the water temperature reaches 17°C.

Metric (°C / mm)  |  Imperial (°F / inches)

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Compare St Peter Port weather with the USA

Below the St Peter Port weather chart shows average maximum daytime temperature for St Peter Port, Guernsey and the USA (Washington).

Maximum daytime temperature (°C)

St Peter Port, Guernsey
USA (Washington)

Metric (°C / mm)  |  Imperial (°F / inches)

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