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Sea
24°
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24°
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24°
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24°
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29°
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29°
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27°
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The annual average maximum daily temperature is 29.6°C (85.2°F) which is very warm and perfect for sunbathing on clear days. The annual average water temperature is typically 26.2°C (79.1°F) which is very warm and ideal for relaxing and swimming for the whole day. Annually there are on average 14.2 days of rain per month and 7.7 hours of sun per day.
The best months to visit Harbour Island 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 26°C (79°F) which is very warm and ideal for relaxing and swimming for the whole day.
Yes, you can sunbathe in Harbour Island all year round.
The coolest month in Harbour Island is January when the average maximum temperature is 26°C (79°F), average temperature is 22°C (72°F) and average minimum temperature is 19°C (66°F).
More info about the annual temperatures and sunshine.
Yes, you can swim in Harbour Island all year round.
The warmest sea water temperatures in Harbour Island are found in August when they peak at 29°C (84°F) and lowest in March when they dip to 24°C (74°F).
The sea temperature is above average for swimming between June and November when the sea temperature is above 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
The hottest month in Harbour Island is August when the average maximum temperature is very hot and perfect for sunbathing on clear days 33°C (92°F), average temperature is 30°C (85°F) and average minimum temperature is 27°C (80°F).
More info about the annual temperatures and sunshine.
The coolest month in Harbour Island is January when the average maximum temperature is 26°C (79°F), average temperature is 22°C (72°F) and average minimum temperature is 19°C (66°F).
More info about the annual temperatures and sunshine
The driest month in Harbour Island is March with 2.5cm (1.0inches) of rain and April has the fewest days of rain with 7.9 days with some rain, a quite rainy time to visit the beach.
More info about the annual rainfall
The coldest sea water temperatures in Harbour Island are found in March when they dip to 24°C (74°F) which is warm and pleasant for relaxing and swimming for long periods.
More info about the annual sea temperatures.
The warmest sea water temperatures in Harbour Island are found in August when they peak at 29°C (84°F) which is very warm and ideal for relaxing and swimming for the whole day.
More info about the annual sea temperatures.
The most humid month in Harbour Island is August with a dew point (an indicator of humidity) of 26°C (79°F) which is extremely humid and uncomfortable unless you are on a beach. At night you would most likely require airconditioning.
More info about the annual humidity.
The least humid month in Harbour Island is March with a dew point of 20°C (68°F) which is somewhat uncomfortable for most people in cities but fine on a beach.
More info about the annual humidity.
The most windy month in Harbour Island is April when the average maximum windspeed is 27KM/H (17MPH) and the average wind speed is 13KM/H (8MPH).
More info about the annual wind conditions.
The hottest month in Harbour Island is August when the average maximum temperature is 33°C (92°F), average temperature is 30°C (85°F) and average minimum temperature is 27°C (80°F).
The coolest month in Harbour Island is January when the average maximum temperature is 26°C (26°F), average temperature is 22°C (72°F) and average minimum temperature is 19°C (66°F).
The longest days in Harbour Island are in June, with an average of 13.7 hours of daylight per day. December has the shortest days with an average of 10.6 hours of daylight per day.
The sunniest days in Harbour Island are in June which has the most hours of sunshine per day. The sunshine percentage is 67% making it sunny but overcast at times. The hours of sunshine per day are 8.8hrs making the days long and bright.
December has the least sunshine. The sunshine percentage is 58% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.1 hours of sunshine per day.
The ultraviolet index is the highest in July when it reaches 12.4 and lowest in December when it reaches 5.3.
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.
The warmest sea water temperatures in Harbour Island are found in August when they peak at 29°C (84°F) and lowest in March when they dip to 24°C (74°F).
The sea is best for swimming between June and November when the temperature is above 26°C (79°F) which is very warm and ideal for relaxing and swimming for the whole day.
The wettest month in Harbour Island is October with 18.9cm (7.4inches) of rain and the most days of rain with 20.3 days with some rain, a very wet time to visit the beach.
The driest month in Harbour Island is March with 2.5cm (1.0inches) of rain and April has the fewest days of rain with 7.9 days with some rain, a quite rainy time to visit the beach.
The most humid month in Harbour Island is August with a dew point (an indicator of humidity) of 26°C (79°F) which is extremely humid and uncomfortable unless you are on a beach. At night you would most likely require airconditioning.
The least humid month in Harbour Island is March with a dew point of 20°C (68°F) which is somewhat uncomfortable for most people in cities but fine on a beach.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
