Guernsey weather live forecast

Today's maximum temperature in Guernsey is expected to be 21°C. Select a day from the live weather forecast for Guernsey (St Peter Port) for more weather parameters.

Thursday
3rd Sep
21

17

2

4
Friday
4th Sep
21

17

1

6
Saturday
5th Sep
20

16

8

5
Sunday
6th Sep
23

16

6

5
Monday
7th Sep
21

16

4

5

5-day weather forecast updated at 04:00 on Wednesday 2nd September 2026 GMT

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Destination

The 5-day weather forecast for Guernsey, represented by St Peter Port, (St Peter Port) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Guernsey weather forecast by day

Below are the detailed weather forecasts for Guernsey for the next 5 days. The forecasts shown are for St Peter Port and may not represent the whole of Guernsey. Browse more destinations in Guernsey to view more weather forecasts.

Guernsey weather for Thursday 3rd September 2026

Expect broken clouds in Guernsey with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the south-west.

21
°C maximum temperature
17
°C minimum temperature
broken clouds
2
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
25
kph wind from SW

Guernsey weather for Friday 4th September 2026

Expect broken clouds in Guernsey with a maximum temperature of 21°C, maximum UV of 6 (High) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the south-west.

21
°C maximum temperature
17
°C minimum temperature
broken clouds
1
hour of sunshine
6
UV index (High)
0
mm of rainfall expected
21
°C wind chill
26
kph wind from SW

Guernsey weather for Saturday 5th September 2026

Expect broken clouds in Guernsey with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

20
°C maximum temperature
16
°C minimum temperature
broken clouds
8
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
16
kph wind from NW

Guernsey weather for Sunday 6th September 2026

Expect scattered clouds in Guernsey with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the west.

23
°C maximum temperature
16
°C minimum temperature
scattered clouds
6
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
23
°C wind chill
20
kph wind from W

Guernsey weather for Monday 7th September 2026

Expect broken clouds in Guernsey with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the west.