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Best
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Best
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Best
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Best
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Tan
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Tan
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Tan
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Tan
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Tan
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Sea
16°
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Sea
15°
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Sea
15°
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Sea
16°
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Sea
18°
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Sea
21°
Swim
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Sea
23°
Swim
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Sea
23°
Swim
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Sea
23°
Swim
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Sea
21°
Swim
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Sea
19°
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Sea
18°
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The annual average maximum daily temperature is 19.8°C (67.7°F) which is not that warm but sunbathing may be possible on some clear days. The annual average water temperature is typically 19.0°C (66.1°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water. Annually there are on average 3.0 days of rain per month and 9.5 hours of sun per day.
The best months to visit Alonnisos 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 weather is perfect for sunbathing in the months from June to August when the maximum temperature reaches above 26°C (72°F)
The sea is best for swimming between June and October when the sea temperature is above the average 19°C (66°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.
No, you can't sunbathe in Alonnisos 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.
The weather is best for sunbathing in the months from June to August when the maximum temperature reaches above 26°C (72°F)
More info about the annual temperatures and sunshine.
No, you can't swim in Alonnisos all year round.
The warmest sea water temperatures in Alonnisos are found in August when they peak at 23°C (74°F) and lowest in March when they dip to 15°C (59°F).
The sea temperature is above average for swimming between June and October when the sea temperature is above 19°C (66°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.
For very comfortable swimming conditions try swimming in the months from July to September when the sea temperature is above 22°C (72°F)
More info about the annual sea temperatures
The hottest month in Alonnisos is August when the average maximum temperature is very warm and perfect for sunbathing on clear days 29°C (85°F), average temperature is 27°C (81°F) and average minimum temperature is 25°C (78°F).
More info about the annual temperatures and sunshine.
The coolest month in Alonnisos is January when the average maximum temperature is 11°C (52°F), average temperature is 10°C (49°F) and average minimum temperature is 9°C (48°F).
More info about the annual temperatures and sunshine
The sunniest days in Alonnisos are in June which has the most hours of sunshine per day. In June the sunshine percentage is 86% making it extremely sunny and pleasant most of the time, with blue skies and rarely a cloud in sight. The hours of sunshine per day are 12.7hrs making the days exceptionally long and full of sunshine.
More info about the annual sunshine.
The driest month in Alonnisos is July with 0.5cm (0.2inches) of rain and the least days of rain with 0.9 days with some rain, an extremely dry time to visit the beach.
More info about the annual rainfall
The coldest sea water temperatures in Alonnisos are found in March when they dip to 15°C (59°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.
The warmest sea water temperatures in Alonnisos are found in August when they peak at 23°C (74°F) which is warm and pleasant for relaxing and swimming for long periods.
More info about the annual sea temperatures.
The most humid month in Alonnisos is August with a dew point (an indicator of humidity) 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.
The least humid month in Alonnisos is January with a dew point of 6°C (44°F) which is a bit dry for some.
More info about the annual humidity.
The most windy month in Alonnisos is February when the average maximum windspeed is 18KM/H (11MPH) and the average wind speed is 13KM/H (8MPH).
More info about the annual wind conditions.
The hottest month in Alonnisos is August when the average maximum temperature is 29°C (85°F), average temperature is 27°C (81°F) and average minimum temperature is 25°C (78°F).
The coolest month in Alonnisos is January when the average maximum temperature is 11°C (11°F), average temperature is 10°C (49°F) and average minimum temperature is 9°C (48°F).
The longest days in Alonnisos are in June, with an average of 14.9 hours of daylight per day. December has the shortest days with an average of 9.4 hours of daylight per day.
The sunniest days in Alonnisos are in June which has the most hours of sunshine per day. The sunshine percentage is 86% making it extremely sunny and pleasant most of the time, with blue skies and rarely a cloud in sight. The hours of sunshine per day are 12.7hrs making the days exceptionally long and full of sunshine.
December has the least sunshine. The sunshine percentage is 67% making it sunny but overcast at times. The hours of sunshine per day are 6.3hrs.
The ultraviolet index is the highest in July when it reaches 10.1 and lowest in December when it reaches 1.8.
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.
The warmest sea water temperatures in Alonnisos are found in August when they peak at 23°C (74°F) and lowest in March when they dip to 15°C (59°F).
The sea is best for swimming between June and October when the temperature is above 19°C (66°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.
The wettest month in Alonnisos is December with 9.8cm (3.9inches) of rain and January has the most days of rain with 5.1 days with some rain, a quite rainy time to visit the beach.
The driest month in Alonnisos is July with 0.5cm (0.2inches) of rain and the least days of rain with 0.9 days with some rain, an extremely dry time to visit the 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.
