Guernsey weather
Our guide to the weather in Guernsey during August
Guernsey offers a unique combination of coastal beauty, cultural attractions and outdoor activities, making it an ideal destination for a summer break. August is usually a mild month with plenty of sunshine, so it's the perfect time to explore the island's stunning scenery and attractions. We've looked at the most up-to-date weather data for Guernsey, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Guernsey weather in August.
What's the temperature like in Guernsey during August?
August is typically the warmest month in Guernsey. The temperature reaches around 18℃ during the daytime, falling away to 16℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it rain in Guernsey during August?
On average, there will be 5 rainy days during the month, amounting to 85.7mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a small chance that you'll catch a thunderstorm during your trip.
Is it windy in Guernsey during August?
Expect moderate breeze becoming stronger at times during August, with occasional gusts up to 21mph. With moderate air temperatures, any breeze will feel cool.
Weather in Guernsey
Our month-by-month guide to the weather and climate in Guernsey
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