Poros Weather

Following the Mediterranean climate of nearby islands, Poros weather is much like the rest of the Saronic Islands, given that its weather fluctuates between very warm and very hot throughout the summer, while its wintertime is chill and a little bit on the cold side! Rainfalls are not frequent throughout the year, except for the winter months.

In brief, Poros is full of warm sun during the summer months, and the island's hottest months are July and August. On the contrary, Poros Town and the rest of Poros' villages and settlements are mostly cold from December to February.
Visitors and residents of Poros who prefer a break with little tourism are advised to stop by the island in the late spring or early autumn months since its weather is quite warm and allows for unwinding and various seaside activities! Keep in mind, though, that rainfalls are still a slim possibility throughout these months.

The warm and shiny weather is fantastic for visitors during the mid and high-season time periods! International and domestic tourism is at an all-time high in July and August, but Poros is quite a popular destination throughout the year for permanent residents of Peloponnese and Attica.
Plus, it is important to know that most shops and establishments are open from the middle of April until October.

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

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

 

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

January is the coldest month of Poros, where chilly breezes are often and rain is more of a possibility through the day.is quite humid with an increased possibility of rain.

The average temperature is 11.4°C/52.5°F (maximum 15°C/59°F | minimum 10°C/50°F)
On the coldest nights, the temperature may drop to 4°C/39.2°F.
On the warmest days, the temperature may reach 21°C/69.8°F.
The sunshine lasts approximately 4.2 hours.
Humidity reaches 72%, while the mean speed of the wind is around 14.6 kph (9.1 mph).
The mean sea temperature is about 16°C/60.8°F; hence, swimming is not recommended.

Alike the month of January, February is a cold month with rough weather, including rainfall and low temperatures.

The average temperature is 11.6°C/52.9°F (maximum: 15°C/59°F | minimum 10°C/50°F).
On the coldest nights, the temperature may drop to 0°C/32°F.
On the warmest days, the temperature may reach 21°C/69.8°F.
The sunshine lasts approximately 4.8 hours.
Humidity reaches 70%, while the mean speed of the wind is around 14.5 kph (9 mph).
The mean sea temperature is about 15.3°C/59.5°F; hence, swimming is not recommended.

March signals the start of spring! Despite being quite a cold month, March is quite different from February, with less rain and more bright sun.

The average temperature is 12.6°C/54.7°F (maximum 16°C/60.8°F | minimum 11°C/51.8°F).
On the coldest nights, the temperature may drop to 6°C/42.8°F.
On the warmest days, the temperature may reach 24°C/75.2°F.
The sunshine lasts approximately 6 hours.
Humidity reaches 66%, while the mean speed of the wind is around 13.4 kph (8.3 mph).
The mean sea temperature is about 15.4°C/59.7°F; hence, swimming is not recommended.

April's waters remain on the colder side, but Poros is significantly warmer throughout the second month of springtime.

The average temperature is 15.6°C/60.1°F (maximum 19°C/66.2°F | minimum 14°C/57.2°F).
On the coldest nights, the temperature may drop to 7°C/44.6°F.
On the warmest days, the temperature may reach 26°C/78.8°F.
The sunshine lasts approximately 7.6 hours.
Humidity reaches 60%, while the mean speed of the wind is around 12.3 kph (7.6 mph).
The mean sea temperature is about 15.9°C/60.6°F; hence, swimming is not recommended.

Sea waters are still not ideal, but May is a much warmer month for Poros Island! Also, May is ideal for a visit to Poros, given that there are few tourists around that time, while accommodation prices and goods are less expensive!

The average temperature is 19.8°C/67.6°F (maximum: 23°C/73.4°F | minimum: 18°C/64.4°F).
On the coldest nights, the temperature may drop to 12°C/53.6°F.
On the warmest days, the temperature may reach 31°C/87.8°F.
The sunshine lasts approximately 9.4 hours.
Humidity reaches 56%, while the mean speed of the wind is around 11.1 kph (6.9 mph).
The mean sea temperature is about 18.8°C/65.8°F; hence, the waters are a bit cool.

June in Poros sets off the summer season, with medium-to-high temperatures, few rains, and warmer waters! Plus, it is the least tourist-filled month of the summer, though hotel prices are starting to spike up.

The average temperature is 24.6°C/76.3°F (maximum 28°C/82.4°F | minimum 22°C/71,6°F).
On the coldest nights, the temperature may drop to 16°C/60.8°F.
On the warmest days, the temperature may reach 36°C/96.8°F.
The sunshine lasts approximately 11.2 hours.
Humidity reaches 50%, while the mean speed of the wind is around 11.5 kph (7.1 mph).
The mean sea temperature is 22.8°C/73°F; hence, the waters are warm.

One of the two hottest months of the season, Poros starts to become full in July! It is usually recommended that you pre-book your ferry tickets and room bookings a couple of months before your visit. In addition, sea waters are really warm and temperatures are quite high!

The average temperature is 28.2°C/82.8°F (maximum 31°C/87.8°F | minimum 25°C/77°F).
On the coldest nights, the temperature may drop to 16°C/60.8°F.
On the warmest days, the temperature may reach 42°C/107.6°F.
The sunshine lasts approximately 11.7 hours.
Humidity reaches 43%, while the mean speed of the wind is around 11.7 kph (7.6 mph).
The mean sea temperature is 25.8°C/78.4°F; hence, the waters are very warm.

August, similarly to the month of July, is known for its sky-high temperatures and dry climate! Poros is full of visitors during July and August.

The average temperature is 28.2°C/82.8°F (maximum 31°C/87.8°F | minimum 25°C/77°F).
On the coldest nights, the temperature may drop to 19°C/66.2°F.
On the warmest days, the temperature may reach 39°C/102.2°F.
The sunshine lasts approximately 11 hours.
Humidity reaches 46%, while the mean speed of the wind is around 14 kph (8.7 mph).
The mean sea temperature is 26.5°C/79.7°F; hence, the waters are very warm.

September and the first autumn months are still a good time to visit Poros. The climate is fine (with fewer high temperatures) and the sea waters are great for swimming!

The average temperature is 24.8°C/76.6°F (maximum 28°C/82.4°F | minimum 23°C/73.4°F).
On the coldest nights, the temperature may drop to 12°C/53.6°F.
On the warmest days, the temperature may reach 35°C/95°F.
The sunshine lasts approximately 9.2 hours.
Humidity reaches 57%, while the mean speed of the wind is around 12 kph (7.5 mph).
The mean sea temperature is 25.4°C/77.7°F; hence, the waters are very warm.

October is the slow ending of the season, with a slight drop in temperature, even though sea waters are fine and some shops and businesses are still open to the public.

The average temperature is 21°C/69.8°F (maximum 24°C/75.2°F | minimum 19°C/66.2°F).
On the coldest nights, the temperature may drop to 14°C/57.2°F.
On the warmest days, the temperature may reach 30°C/86°F.
The sunshine lasts approximately 6.7 hours.
Humidity reaches 66%, while the mean speed of the wind is around 12.5 kph (7.8 mph).
The mean sea temperature is 22.8°C/73°F; hence, the waters are warm.

The month of November comes with a significant dropoff in temperatures and chilly sea waters.

The average temperature is 17.6°C/63.7°F (maximum 20°C/68°F | minimum 15°C/59°F).
On the coldest nights, the temperature may drop to 6°C/42.8°F.
On the warmest days, the temperature may reach 29°C/84.2°F.
The sunshine lasts approximately 5.1 hours.
Humidity reaches 73%, while the mean speed of the wind is around 13 kph (8.1 mph).
The mean sea temperature is 19.9°C/67.8°F; hence, the waters are a little bit cool.

Decembers are mildly cold in Poros, given that rainfalls are more likely to occur, temperatures are lower, and this Saronic Island mostly houses only its permanent residents.

The average temperature is 14°C/57.2°F (maximum 16°C/60.8°F | minimum 12°C/53.6°F).
On the coldest nights, the temperature may drop to 5°C/41°F.
On the warmest days, the temperature may reach 23°C/73.4°F.
The sunshine lasts approximately 4.2 hours.
Humidity reaches 73%, while the mean speed of the wind is around 13.8 kph (8.6 mph).
The mean sea temperature is about 17.3°C/63.1°F; hence, swimming is not quite recommended.