Annual average weather for Guernsey, Channel Islands

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Annual Average Weather for Guernsey, Channel Islands

The annual average maximum daily temperature is 13.6°C (56.6°F) which is too cold for sunbathing. The annual average water temperature is typically 14.1°C (57.4°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea. Annually there are on average 16.7 days of rain per month and 5.2 hours of sun per day.

When is the best time to visit Guernsey?

The best months to visit Guernsey are June, July, August, September, for the best beach weather, the most sunshine and optimal sunbathing and swimming conditions with the least chance of rain.

The sea is best for swimming between June and November when the sea temperature is above the average 14°C (57°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

Can you sunbathe in Guernsey year round?

No, you can't sunbathe in Guernsey all year round. Some months are too cold for sunbathing, however you might enjoy other beach activities such as taking a walk, going hiking along trails or just enjoying the scenery.

Even during the warmest month, sunbathing may not be ideal as temperatures don't reach 20°C (72°F). The warmest month in Guernsey is July when the average maximum temperature is 19°C (67°F), average temperature is 17°C (62°F) and average minimum temperature is 14°C (57°F).

More info about the annual temperatures and sunshine.

Can you swim in Guernsey year round?

No, you can't swim in Guernsey all year round.

The warmest sea water temperatures in Guernsey are found in August when they peak at 20°C (68°F) and lowest in February when they dip to 8°C (47°F).

The sea temperature is above average for swimming between June and November when the sea temperature is above 14°C (57°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

More info about the annual sea temperatures

When is the hottest month in Guernsey?

The hottest month in Guernsey is July when the average maximum temperature is not that warm but sunbathing may be possible on some clear days 19°C (67°F), average temperature is 17°C (62°F) and average minimum temperature is 14°C (57°F).

More info about the annual temperatures and sunshine.

When is the coldest month in Guernsey?

The coolest month in Guernsey is February when the average maximum temperature is 8°C (47°F), average temperature is 7°C (44°F) and average minimum temperature is 5°C (41°F).

More info about the annual temperatures and sunshine

When is the sunniest month in Guernsey?

The sunniest days in Guernsey are in June which has the most hours of sunshine per day. In June the sunshine percentage is 51% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 8.3 hours of sunshine per day.

More info about the annual sunshine.

When is the least sunny month in Guernsey?

December has the least sunshine. In December the sunshine percentage is 22% making it extremely gloomy and overcast with little sunshine. There are 1.8 hours of sunshine per day.

More info about the annual sunshine.

When is the driest month in Guernsey?

The driest month in Guernsey is May with 0.7cm (0.3inches) of rain and September has the fewest days of rain with 13 days with some rain, a pretty wet time to visit the beach.

More info about the annual rainfall

When is the wettest month in Guernsey?

The wettest month in Guernsey is December with 1.9cm (0.7inches) of rain and January has the most days of rain with 21.5 days with some rain, a very wet time to visit the beach.

More info about the annual rainfall.

When is the sea the coldest in Guernsey?

The coldest sea water temperatures in Guernsey are found in February when they dip to 8°C (47°F) which is very cold and bracing, it's not recommended you swim with out a full wet suit.

More info about the annual sea temperatures.

When is the sea the warmest in Guernsey?

The warmest sea water temperatures in Guernsey are found in August when they peak at 20°C (68°F) which is comfortable for swimming though some may prefer warmer water.

More info about the annual sea temperatures.

When is the most humid month in Guernsey?

The most humid month in Guernsey is August with a dew point (an indicator of humidity) of 16°C (60°F) which is comfortable for everyone.

More info about the annual humidity.

When is the least humid month in Guernsey?

The least humid month in Guernsey is February with a dew point of 6°C (43°F) which is a bit dry for some.

More info about the annual humidity.

When is the windiest month in Guernsey?

The most windy month in Guernsey is December when the average maximum windspeed is 36KM/H (22MPH) and the average wind speed is 25KM/H (15MPH).

More info about the annual wind conditions.

Annual Temperature for Guernsey

The hottest month in Guernsey is July when the average maximum temperature is 19°C (67°F), average temperature is 17°C (62°F) and average minimum temperature is 14°C (57°F).

The coolest month in Guernsey is February when the average maximum temperature is 8°C (8°F), average temperature is 7°C (44°F) and average minimum temperature is 5°C (41°F).

Annual Sunshine for Guernsey

The longest days in Guernsey are in June, with an average of 16.2 hours of daylight per day. December has the shortest days with an average of 8.2 hours of daylight per day.

The sunniest days in Guernsey are in June which has the most hours of sunshine per day. The sunshine percentage is 51% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 8.3 hours of sunshine per day.

December has the least sunshine. The sunshine percentage is 22% making it extremely gloomy and overcast with little sunshine. There are 1.8 hours of sunshine per day.

The ultraviolet index is the highest in June when it reaches 7.8 and lowest in December when it reaches 0.6.

An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Annual Sea Temperature for Guernsey

The warmest sea water temperatures in Guernsey are found in August when they peak at 20°C (68°F) and lowest in February when they dip to 8°C (47°F).

The sea is best for swimming between June and November when the temperature is above 14°C (57°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

Annual Rainfall for Guernsey

The wettest month in Guernsey is December with 1.9cm (0.7inches) of rain and January has the most days of rain with 21.5 days with some rain, a very wet time to visit the beach.

The driest month in Guernsey is May with 0.7cm (0.3inches) of rain and September has the fewest days of rain with 13 days with some rain, a pretty wet time to visit the beach.

Annual Humidity for Guernsey

The most humid month in Guernsey is August with a dew point (an indicator of humidity) of 16°C (60°F) which is comfortable for everyone.

The least humid month in Guernsey is February with a dew point of 6°C (43°F) which is a bit dry for some.

Annual Wind Speed for Guernsey

The most windy month in Guernsey is December when the average maximum windspeed is 36KM/H (22MPH) and the average wind speed is 25KM/H (15MPH).

The least windy month in Guernsey is August when the average maximum windspeed is 27KM/H (16MPH) and the average wind speed is 18KM/H (11MPH).

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