Guernsey weather
Our guide to the weather in Guernsey during September
Guernsey is a beautiful Channel Island with plenty of scenic coastal walks, stunning beaches, and a unique culture to explore. September is a great time to visit, with mild temperatures and fewer crowds. 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 September.
What's the temperature like in Guernsey during September?
The temperature is extremely stable in September with average highs of 17℃ and lows just 2℃ lower at 15℃. 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 September?
On average, there will be 5 rainy days during the month, amounting to 78.2mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. There's a small chance that you'll catch a thunderstorm during your trip.
Is it windy in Guernsey during September?
Expect moderate breeze becoming stronger at times during September, with occasional gusts up to 23mph. With moderate air temperatures, any breeze will feel cool.
Weather in Guernsey
Our month-by-month guide to the weather and climate in Guernsey
Guernsey weather in
JanuaryGuernsey weather in
FebruaryGuernsey weather in
MarchGuernsey weather in
AprilGuernsey weather in
MayGuernsey weather in
JuneGuernsey weather in
JulyGuernsey weather in
AugustGuernsey weather in
SeptemberGuernsey weather in
OctoberGuernsey weather in
NovemberGuernsey weather in
December