Annual average weather for Gustavia Harbor, Saint Barthelemy

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Annual Average Weather for Gustavia Harbor, Saint Barthelemy

The annual average maximum daily temperature is 29.5°C (85.2°F) which is very warm and perfect for sunbathing on clear days. The annual average water temperature is typically 27.2°C (80.9°F) which is very warm and ideal for relaxing and swimming for the whole day. Annually there are on average 17.5 days of rain per month and 7.4 hours of sun per day.

When is the best time to visit Gustavia Harbor?

The best months to visit Gustavia Harbor are January, February, March, April, 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 27°C (81°F) which is very warm and ideal for relaxing and swimming for the whole day.

Can you sunbathe in Gustavia Harbor year round?

Yes, you can sunbathe in Gustavia Harbor all year round.

The coolest month in Gustavia Harbor is February when the average maximum temperature is 28°C (82°F), average temperature is 26°C (78°F) and average minimum temperature is 23°C (74°F).

More info about the annual temperatures and sunshine.

Can you swim in Gustavia Harbor year round?

Yes, you can swim in Gustavia Harbor all year round.

The warmest sea water temperatures in Gustavia Harbor are found in October when they peak at 28°C (83°F) and lowest in March when they dip to 26°C (79°F).

The sea is excellent for swimming all year round as the water temperature is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures

When is the hottest month in Gustavia Harbor?

The hottest month in Gustavia Harbor is September when the average maximum temperature is very hot and perfect for sunbathing on clear days 31°C (88°F), average temperature is 29°C (83°F) and average minimum temperature is 27°C (80°F).

More info about the annual temperatures and sunshine.

When is the coldest month in Gustavia Harbor?

The coolest month in Gustavia Harbor is February when the average maximum temperature is 28°C (82°F), average temperature is 26°C (78°F) and average minimum temperature is 23°C (74°F).

More info about the annual temperatures and sunshine

When is the sunniest month in Gustavia Harbor?

The sunniest days in Gustavia Harbor are in April which has the most hours of sunshine per day. In April the sunshine percentage is 68% making it sunny but overcast at times. The hours of sunshine per day are 8.4hrs making the days long and bright.

More info about the annual sunshine.

When is the least sunny month in Gustavia Harbor?

October has the least sunshine. In October the sunshine percentage is 53% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.7 hours of sunshine per day.

More info about the annual sunshine.

When is the driest month in Gustavia Harbor?

The driest month in Gustavia Harbor is March with 4.6cm (1.8inches) of rain and April has the fewest days of rain with 12.5 days with some rain, a pretty wet time to visit the beach.

More info about the annual rainfall

When is the wettest month in Gustavia Harbor?

The wettest month in Gustavia Harbor is September with 14.5cm (5.7inches) of rain and December has the most days of rain with 20.1 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 Gustavia Harbor?

The coldest sea water temperatures in Gustavia Harbor are found in March when they dip to 26°C (79°F) which is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures.

When is the sea the warmest in Gustavia Harbor?

The warmest sea water temperatures in Gustavia Harbor are found in October when they peak at 28°C (83°F) which is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures.

When is the most humid month in Gustavia Harbor?

The most humid month in Gustavia Harbor is September with a dew point (an indicator of humidity) of 24°C (76°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

More info about the annual humidity.

When is the least humid month in Gustavia Harbor?

The least humid month in Gustavia Harbor is March with a dew point of 21°C (70°F) which is somewhat uncomfortable for most people in cities but fine on a beach.

More info about the annual humidity.

When is the windiest month in Gustavia Harbor?

The most windy month in Gustavia Harbor is July when the average maximum windspeed is 30KM/H (19MPH) and the average wind speed is 18KM/H (11MPH).

More info about the annual wind conditions.

Annual Temperature for Gustavia Harbor

The hottest month in Gustavia Harbor is September when the average maximum temperature is 31°C (88°F), average temperature is 29°C (83°F) and average minimum temperature is 27°C (80°F).

The coolest month in Gustavia Harbor is February when the average maximum temperature is 28°C (28°F), average temperature is 26°C (78°F) and average minimum temperature is 23°C (74°F).

Annual Sunshine for Gustavia Harbor

The longest days in Gustavia Harbor are in June, with an average of 13.2 hours of daylight per day. December has the shortest days with an average of 11.1 hours of daylight per day.

The sunniest days in Gustavia Harbor are in April which has the most hours of sunshine per day. The sunshine percentage is 68% making it sunny but overcast at times. The hours of sunshine per day are 8.4hrs making the days long and bright.

October has the least sunshine. The sunshine percentage is 53% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.7 hours of sunshine per day.

The ultraviolet index is the highest in April when it reaches 13.6 and lowest in December when it reaches 7.6.

An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. 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 Gustavia Harbor

The warmest sea water temperatures in Gustavia Harbor are found in October when they peak at 28°C (83°F) and lowest in March when they dip to 26°C (79°F).

The sea is excellent for swimming all year round as the water temperature is very warm and ideal for relaxing and swimming for the whole day.

Annual Rainfall for Gustavia Harbor

The wettest month in Gustavia Harbor is September with 14.5cm (5.7inches) of rain and December has the most days of rain with 20.1 days with some rain, a very wet time to visit the beach.

The driest month in Gustavia Harbor is March with 4.6cm (1.8inches) of rain and April has the fewest days of rain with 12.5 days with some rain, a pretty wet time to visit the beach.

Annual Humidity for Gustavia Harbor

The most humid month in Gustavia Harbor is September with a dew point (an indicator of humidity) of 24°C (76°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

The least humid month in Gustavia Harbor is March with a dew point of 21°C (70°F) which is somewhat uncomfortable for most people in cities but fine on a beach.

Annual Wind Speed for Gustavia Harbor

The most windy month in Gustavia Harbor is July when the average maximum windspeed is 30KM/H (19MPH) and the average wind speed is 18KM/H (11MPH).

The least windy month in Gustavia Harbor is September when the average maximum windspeed is 22KM/H (14MPH) and the average wind speed is 13KM/H (8MPH).

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