Sifnos Weather

Sifnos Weather

Sifnos has a classic Cycladic-style climate, including a humid environment, sweltering summers, very strong winds, and lots of sunny days!

In brief, the island is excellent for a visit from May to October. Temperatures reach their peak during July and August.

Below, you can see the average temperatures in Sifnos by month. We have also gathered information regarding the weather by month.

Average High & Low Air Temperature (in °C/°F)

 

Discover the weather in Sifnos by month:
January | February | March | April | May | June | July | August | September | October | November | December

The month of January presents the year's lowest temperatures, as well as strong breezes of cold wind.

The average temperature is 12.4°C/54.4°F (maximum 15°C/59°F | minimum 10°C/50°F)
On the coldest nights, the temperature may drop to 1.7°C/35°F.
On the warmest days, the temperature may reach 24.4°C/76°F.
The sunshine lasts approximately 7 hours.
Humidity reaches 69%, while the mean speed of the wind is around 29 kph (18 mph).
The mean sea temperature is about 16.8°C/62.2°F; hence, swimming is not recommended.

February has low temperatures, usually around 13°C/55.4°F, while the air remains quite humid.

The average temperature is 13.2°C/55.8°F (maximum: 15°C/59°F | minimum 10°C/50°F).
On the coldest nights, the temperature may drop to 2.2°C/36°F.
On the warmest days, the temperature may reach 20.6°C/69°F.
The sunshine lasts approximately 8 hours.
Humidity reaches 70%, while the mean speed of the wind is around 29 kph (18 mph).
The mean sea temperature is about 16.5°C/61.7°F; hence, the waters are frigid.

During March, air temperatures remain at a low level, though the island does have much more sunlight throughout the day.

The average temperature is 13.8°C/56.8°F (maximum 17°C/62.6°F | minimum 11°C/51.8°F).
On the coldest nights, the temperature may drop to 2.8°C/37°F.
On the warmest days, the temperature may reach 25°C/77°F.
The sunshine lasts approximately 9 hours.
Humidity reaches 67%, while the mean speed of the wind is around 27 kph (16.8 mph).
The mean sea temperature is about 16.5°C/61.7°F; hence, swimming is not recommended.

April is the first taste of the tourist season since some establishments welcome their first guests with mid-level temperatures and bright sun.

The average temperature is 17.8°C/64°F (maximum 20°C/68°F | minimum 13°C/55.4°F).
On the coldest nights, the temperature may drop to 8.3°C/47°F.
On the warmest days, the temperature may reach 30°C/86°F.
The sunshine lasts approximately 10 hours.
Humidity reaches 64%, while the mean speed of the wind is around 23 kph (14.3 mph).
The mean sea temperature is about 17°C/62.6°F; hence, the waters are quite cold.

May is a good budget-saving option for vacation in Sifnos, with fewer visitors and a dry climate that is warm enough for summer clothes.

The average temperature is 21°C/69.8°F (maximum: 24°C/75.2°F | minimum: 17°C/62.6°F).
On the coldest nights, the temperature may drop to 11.7°C/53°F.
On the warmest days, the temperature may reach 35.6°C/96°F.
The sunshine lasts approximately 11 hours.
Humidity reaches 58%, while the mean speed of the wind is around 20 kph (12.4 mph).
The mean sea temperature is about 19°C/66.2°F; hence, the waters are a little cold.

June has far less rainfalls occuring, while sea waters are warmer and temperatures are higher.

The average temperature is 25.1°C/77.2°F (maximum 28°C/82.4°F | minimum 21°C/69.8°F).
On the coldest nights, the temperature may drop to 16.1°C/61°F.
On the warmest days, the temperature may reach 42.8°C/109°F.
The sunshine lasts approximately 12 hours.
Humidity reaches 57%, while the mean speed of the wind is around 21 kph (13 mph).
The mean sea temperature is 22.4°C/72.3°F; hence, the waters are a bit warm.

July presents temperatures reaching up to 40°C/104°F and is the start of the period when Sifnos fills up with visitors!

The average temperature is 27.2°C/81°F (maximum 30°C/86°F | minimum 24°C/75.2°F).
On the coldest nights, the temperature may drop to 20°C/68°F.
On the warmest days, the temperature may reach 40°C/104°F.
The sunshine lasts approximately 12 hours.
Humidity reaches 54%, while the mean speed of the wind is around 25 kph (15.5 mph).
The mean sea temperature is 24.3°C/75.7°F; hence, the waters are quite warm.

August is a month characterized by warm sea waters, sizzling hot sun rays, and a dry climate. Sifnos in August is full of people, thus we recommend that you book your hotel of choice and your ferry tickets a few months in advance.

The average temperature is 27.1°C/80.8°F (maximum 30°C/86°F | minimum 24°C/75.2°F).
On the coldest nights, the temperature may drop to 19.4°C/67°F.
On the warmest days, the temperature may reach 39.4°C/103°F.
The sunshine lasts approximately 12 hours.
Humidity reaches 59%, while the mean speed of the wind is around 26 kph (16.2 mph).
The mean sea temperature is 25°C/77°F; hence, the waters are very warm.

September presents another great chance for visitors! It is a very warm month with excellent sea temperatures. The available hotels may have lower prices than those in July and August, especially towards the end of the month!

The average temperature is 24.7°C/76.4°F (maximum 27°C/80.6°F | minimum 22°C/71.6°F).
On the coldest nights, the temperature may drop to 16.7°C/62°F.
On the warmest days, the temperature may reach 35.6°C/96°F.
The sunshine lasts approximately 11 hours.
Humidity reaches 63%, while the mean speed of the wind is around 24 kph (14.9 mph).
The mean sea temperature is 23.9°C/75°F; hence, the waters are warm.

During October, the majority of tourist facilities shut down, with only a few accommodation options and establishments remaining open.

The average temperature is 19.3°C/66.8°F (maximum 23°C/73.4°F | minimum 18°C/64.4°F).
On the coldest nights, the temperature may drop to 13.9°C/57°F.
On the warmest days, the temperature may reach 32.8°C/91°F.
The sunshine lasts approximately 9.5 hours.
Humidity reaches 70%, while the mean speed of the wind is around 26 kph (16.2 mph).
The mean sea temperature is 22.3°C/72.1°F; hence, the waters are warm.

November in Sifnos still has lots of sunny hours and the temperature remains at a mild level.

The average temperature is 17.9°C/64.2°F (maximum 20°C/68°F | minimum 15°C/59°F).
On the coldest nights, the temperature may drop to 10.6°C/51°F.
On the warmest days, the temperature may reach 28.9°C/84°F.
The sunshine lasts approximately 8 hours.
Humidity reaches 71%, while the mean speed of the wind is around 26 kph (16.2 mph).
The mean sea temperature is 20.2°C/68.4°F; hence, the waters are a bit cold.

The island cools down in December, with high humidity levels, strong winds, rainfalls, and lower temperatures.

The average temperature is 14.7°C/58.5°F (maximum 17°C/62.6°F | minimum 12°C/53.6°F).
On the coldest nights, the temperature may drop to 6.1°C/43°F.
On the warmest days, the temperature may reach 21.7°C/71°F.
The sunshine lasts approximately 6.5 hours.
Humidity reaches 75%, while the mean speed of the wind is around 28 kph (17.4 mph).
The mean sea temperature is about 18.2°C/64.8°F; hence, the waters are cold.