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Sea
28°
Swim
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Sea
28°
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Sea
28°
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28°
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Sea
29°
Swim
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29°
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29°
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29°
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29°
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30°
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29°
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28°
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The best months to visit Guam are February, March, April, May, 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 29°C (84°F) which is very warm and ideal for relaxing and swimming for the whole day.
Yes, you can sunbathe in Guam all year round.
The coolest month in Guam is February when the average maximum temperature is 30°C (85°F), average temperature is 27°C (81°F) and average minimum temperature is 24°C (76°F).
More info about the annual temperatures and sunshine.
Yes, you can swim in Guam all year round.
The warmest sea water temperatures in Guam are found in October when they peak at 30°C (85°F) and lowest in March when they dip to 28°C (82°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
The hottest month in Guam is June when the average maximum temperature is very hot 31°C (88°F), average temperature is 29°C (83°F) and average minimum temperature is 26°C (79°F).
More info about the annual temperatures and sunshine.
The coolest month in Guam is February when the average maximum temperature is 30°C (85°F), average temperature is 27°C (81°F) and average minimum temperature is 24°C (76°F).
More info about the annual temperatures and sunshine
The driest month in Guam is April with 5.9cm (2.3inches) of rain and May has the fewest days of rain with 22.6 days with some rain, a very wet time to visit the beach.
More info about the annual rainfall
The coldest sea water temperatures in Guam are found in March when they dip to 28°C (82°F) which is very warm and ideal for relaxing and swimming for the whole day.
More info about the annual sea temperatures.
The warmest sea water temperatures in Guam are found in October when they peak at 30°C (85°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 Guam is September with a dew point (an indicator of humidity) of 26°C (78°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.
The least humid month in Guam is February with a dew point of 23°C (74°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
More info about the annual humidity.
The most windy month in Guam is February when the average maximum windspeed is 31KM/H (19MPH) and the average wind speed is 18KM/H (11MPH).
More info about the annual wind conditions.
The hottest month in Guam is June when the average maximum temperature is 31°C (88°F), average temperature is 29°C (83°F) and average minimum temperature is 26°C (79°F).
The coolest month in Guam is February when the average maximum temperature is 30°C (30°F), average temperature is 27°C (81°F) and average minimum temperature is 24°C (76°F).
The longest days in Guam are in June, with an average of 12.9 hours of daylight per day. December has the shortest days with an average of 11.3 hours of daylight per day.
The sunniest days in Guam are in May which has the most hours of sunshine per day with an average of 9.3 hours of sunshine per day, making it generally sunny and pleasant with long bright days.
December has the least sunshine with an average of 6.6 hours of sunshine per day, making it quite sunny but with occasional periods of cloudy and overcast skies.
The ultraviolet index is the highest in April when it reaches 14.4 and lowest in December when it reaches 9.5.
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 wettest month in Guam is August with 34.7cm (13.7inches) of rain and July has the most days of rain with 28.3 days with some rain, a very wet time to visit the beach.
The driest month in Guam is April with 5.9cm (2.3inches) of rain and May has the fewest days of rain with 22.6 days with some rain, a very wet time to visit the beach.
The most humid month in Guam is September with a dew point (an indicator of humidity) of 26°C (78°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 Guam is February with a dew point of 23°C (74°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
