Weather & climate · Saint Peter Port
Best Time to Visit Guernsey
July to September
The best time to visit Guernsey is July to September, when daytime highs in Saint Peter Port are around 17–18°C. August is the warmest month (18°C by day), February the coldest (8°C at night), and November the wettest with about 110 mm of rain.
18°C
Warmest: August
8°C
Coldest nights: February
849 mm
Rain per year
110 mm
Wettest: November
Guernsey weather by month
- Jan10°C8°C96 mm
- Feb9°C8°C79 mm
- Mar10°C8°C69 mm
- Apr11°C9°C47 mm
- May13°C11°C51 mm
- Jun15°C14°C47 mm
- Jul17°C16°C47 mm
- Aug18°C16°C54 mm
- Sep17°C16°C47 mm
- Oct16°C14°C96 mm
- Nov13°C12°C110 mm
- Dec11°C9°C106 mm
Best time Good Less ideal
| Month | High | Low | Rain | Humidity | Cloud cover | Verdict |
|---|---|---|---|---|---|---|
| January | 10°C | 8°C | 96 mm | 83% | 85% | Fair |
| February | 9°C | 8°C | 79 mm | 83% | 82% | Fair |
| March | 10°C | 8°C | 69 mm | 84% | 77% | Fair |
| April | 11°C | 9°C | 47 mm | 85% | 68% | Fair |
| May | 13°C | 11°C | 51 mm | 87% | 68% | Fair |
| June | 15°C | 14°C | 47 mm | 88% | 66% | Fair |
| July | 17°C | 16°C | 47 mm | 88% | 63% | Best time |
| August | 18°C | 16°C | 54 mm | 86% | 67% | Best time |
| September | 17°C | 16°C | 47 mm | 83% | 67% | Best time |
| October | 16°C | 14°C | 96 mm | 82% | 78% | Fair |
| November | 13°C | 12°C | 110 mm | 82% | 85% | Fair |
| December | 11°C | 9°C | 106 mm | 82% | 86% | Fair |
Data: NASA POWER (Prediction Of Worldwide Energy Resources) — 25-year climate averages 2001–2025, public domain, for the area around Saint Peter Port (49.45, -2.53). Satellite and model averages — local weather stations can differ by 1–2 °C, and mountains or coasts elsewhere in Guernsey have their own climate.
Frequently asked questions
When is the best time to visit Guernsey?
July to September. The best time to visit Guernsey is July to September, when daytime highs in Saint Peter Port are around 17–18°C. August is the warmest month (18°C by day), February the coldest (8°C at night), and November the wettest with about 110 mm of rain.
What is the hottest month in Guernsey?
August, with average highs of 18°C in Saint Peter Port.
What is the coldest month in Guernsey?
February, when nights drop to about 8°C and days reach 9°C.
What is the rainiest month in Guernsey?
November with about 110 mm; April is the driest (47 mm).
When should I avoid visiting Guernsey?
December is the least comfortable month on average: 11°C by day and 106 mm of rain.