In Syros, a small Greek island belonging to the archipelago of the Cyclades, the climate is
, with mild, rainy winters and warm, sunny summers.
. In autumn and winter, the wind blows in periods of bad weather, either the mild southerly wind preceding Atlantic disturbances or the northwest wind brought by cold outbreaks from the Balkan Peninsula. On the other hand, in summer, the
follows the Mediterranean pattern, in fact, it is concentrated from October to March, and is not abundant, since it amounts to 475 millimeters (18.5 inches) per year, and this is confirmed by the aridity of the landscape.
, from December to mid-March, is mild, rainy and windy. The wind, frequent and sometimes stormy, heightens the feeling of cold. There is a moderate amount of mild days, with highs around 16/18 °C (61/64 °F), but the island is located quite to the north and close enough to the mainland to receive cold air with some frequency, to the point that there can be cold days, with highs below 10 °C (50 °F), and occasionally, even snow can fall.
, from mid-March to May, is mild and sunny, but it is often windy. By mid-May, the
starts to blow, an insistent wind, cool and dry, which blows from the north for some days in a row, especially during the day, but sometimes even at night.
, from June to mid-September, is warm and sunny, but also windy. The Meltemi blows for long periods, especially in July and August, and it's stronger in the afternoon, but it can insist also in the evening. With this wind, the maximum temperature usually remains below or around 30 °C (86 °F), and heat waves are generally less intense than in other parts of Greece.
, from mid-September to November, is initially warm and sunny, and gradually becomes cooler and more rainy. Autumn too is windy: as long as the weather is good, the
in Syros is great in summer, when clear skies prevail, while in winter, sunny periods alternate with others characterized by clouds and rain.
is never very high, since the wind that blows in summer tends to keep it a bit low, however, it reaches a maximum of 23.5 °C (74 °F) in July and September and 24 °C (75 °F) in August; in June, it's still a bit cool.
to go to Syros for a beach holiday is the summer, from June to mid-September. In June, as we mentioned, the sea is cooler than in midsummer.
It's better to bring a sweatshirt for cool evenings, which occur mainly in June, but given the intensity of the wind, those who are sensitive to cold can feel a little cool even in July and August.
If you want to visit towns and go hiking and walking, spring is fine, in April and May, but since it is normally not too hot, you can usually walk around the island also in summer, except in the rare hot and windless days.
. Here are the average temperatures.
January, the coldest month of the year, is generally a mild month. The average temperature is of
11.4 °C, with a minimum of
9.6 °C and a maximum of
13.2 °C.
On the coldest nights of the month, the temperature usually drops to around
4 °C. However, it dropped to
0 °C in January 2004.
On the warmest days of the month, the temperature usually reaches around
17.5 °C. However, it reached
19 °C in January 2002.
Precipitation amounts to
90 mm, distributed over 10 days.
The day lasts on average 9 hours and 55 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 37% of the time.
The average humidity is 70%.
The average wind speed is of
21.6 kph.
The average sea temperature is of
16 °C. Therefore, the sea is cold for swimming.
February is generally a mild month. The average temperature is of
11.9 °C, with a minimum of
9.9 °C and a maximum of
13.9 °C.
On the coldest nights of the month, the temperature usually drops to around
4.5 °C. However, it dropped to
-1 °C in February 2004.
On the warmest days of the month, the temperature usually reaches around
18.5 °C. However, it reached
22 °C in February 2016.
Precipitation amounts to
65 mm, distributed over 8 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 70%.
The average wind speed is of
22 kph.
The average sea temperature is of
15.5 °C. Therefore, the sea is cold for swimming.
March is generally a mild month. The average temperature is of
13.6 °C, with a minimum of
11.5 °C and a maximum of
15.8 °C.
On the coldest nights of the month, the temperature usually drops to around
7 °C. However, it dropped to
2 °C in March 2003.
On the warmest days of the month, the temperature usually reaches around
20.5 °C. However, it reached
25 °C in March 2001.
Precipitation amounts to
55 mm, distributed over 7 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 68%.
The average wind speed is of
19.6 kph.
The average sea temperature is of
15.4 °C. Therefore, the sea is cold for swimming.
April is generally a very mild month. The average temperature is of
16.2 °C, with a minimum of
13.8 °C and a maximum of
18.6 °C.
On the coldest nights of the month, the temperature usually drops to around
10 °C. However, it dropped to
7 °C in April 2003.
On the warmest days of the month, the temperature usually reaches around
24 °C. However, it reached
28 °C in April 2016.
Precipitation amounts to
25 mm, distributed over 5 days.
The day lasts on average 13 hours and 10 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 65%.
The average wind speed is of
17.5 kph.
The average sea temperature is of
16.2 °C. Therefore, the sea is cold for swimming.
May is generally a warm month. The average temperature is of
20.5 °C, with a minimum of
17.9 °C and a maximum of
23.1 °C.
On the coldest nights of the month, the temperature usually drops to around
14 °C. However, it dropped to
12 °C in May 2000.
On the warmest days of the month, the temperature usually reaches around
28.5 °C. However, it reached
34 °C in May 2020.
Precipitation amounts to
15 mm, distributed over 3 days.
The day lasts on average 14 hours and 10 minutes. So the days are long.
There are on average 9.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 61%.
The average wind speed is of
15.1 kph.
The average sea temperature is of
18.5 °C. Therefore, the sea is very cool for swimming.
June is generally a warm to hot month. The average temperature is of
24.9 °C, with a minimum of
22.3 °C and a maximum of
27.4 °C.
On the coldest nights of the month, the temperature usually drops to around
18 °C. However, it dropped to
16 °C in June 2012.
On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
39 °C in June 2007.
Precipitation amounts to only
5 mm, distributed over 2 days.
The day lasts on average 14 hours and 40 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 11 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 56%.
The average wind speed is of
16.4 kph.
The average sea temperature is of
21.7 °C. Therefore, the sea is cool for swimming.
July, the hottest month of the year, is generally a warm to hot month. The average temperature is of
27.1 °C, with a minimum of
24.7 °C and a maximum of
29.6 °C.
On the coldest nights of the month, the temperature usually drops to around
21.5 °C. However, it dropped to
20 °C in July 2005.
On the warmest days of the month, the temperature usually reaches around
34.5 °C. However, it reached
40 °C in July 2017.
Precipitation amounts to only
2 mm, distributed over 0 days.
The day lasts on average 14 hours and 25 minutes. So the days are long.
There are on average 12 hours of sunshine per day. So, the sun shines 84% of the time.
The average humidity is 54%.
The average wind speed is of
19.8 kph.
The average sea temperature is of
23.5 °C. Therefore, the sea can be considered barely acceptable for swimming.
August is generally a warm to hot month. The average temperature is of
27 °C, with a minimum of
24.8 °C and a maximum of
29.3 °C.
On the coldest nights of the month, the temperature usually drops to around
22 °C. However, it dropped to
20 °C in August 2002.
On the warmest days of the month, the temperature usually reaches around
33.5 °C. However, it reached
35 °C in August 1999.
Precipitation amounts to only
2 mm, distributed over 0 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 11.5 hours of sunshine per day. So, the sun shines 85% of the time.
The average humidity is 56%.
The average wind speed is of
20.4 kph.
The average sea temperature is of
24.2 °C. Therefore, the sea is warm enough for swimming.
September is generally a warm to hot month. The average temperature is of
24.1 °C, with a minimum of
21.7 °C and a maximum of
26.4 °C.
On the coldest nights of the month, the temperature usually drops to around
18 °C. However, it dropped to
15 °C in September 2014.
On the warmest days of the month, the temperature usually reaches around
31.5 °C. However, it reached
34.9 °C in September 2017.
Precipitation amounts to
12 mm, distributed over 2 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 9.5 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 62%.
The average wind speed is of
17.8 kph.
The average sea temperature is of
23.3 °C. Therefore, the sea can be considered barely acceptable for swimming.
October is generally a warm month. The average temperature is of
20.2 °C, with a minimum of
18.1 °C and a maximum of
22.4 °C.
On the coldest nights of the month, the temperature usually drops to around
14 °C. However, it dropped to
11 °C in October 2011.
On the warmest days of the month, the temperature usually reaches around
27.5 °C. However, it reached
34 °C in October 2020.
Precipitation amounts to
50 mm, distributed over 5 days.
The day lasts on average 11 hours and 10 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 68%.
The average wind speed is of
18.7 kph.
The average sea temperature is of
21.4 °C. Therefore, the sea is cool for swimming.
November is generally a very mild month. The average temperature is of
16.6 °C, with a minimum of
14.7 °C and a maximum of
18.6 °C.
On the coldest nights of the month, the temperature usually drops to around
10 °C. However, it dropped to
5 °C in November 2006.
On the warmest days of the month, the temperature usually reaches around
23.5 °C. However, it reached
28 °C in November 2008.
Precipitation amounts to
65 mm, distributed over 7 days.
The day lasts on average 10 hours and 5 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
18.8 kph.
The average sea temperature is of
18.9 °C. Therefore, the sea is very cool for swimming.
December is generally a mild month. The average temperature is of
13.2 °C, with a minimum of
11.4 °C and a maximum of
15 °C.
On the coldest nights of the month, the temperature usually drops to around
6.5 °C. However, it dropped to
3 °C in December 2001.
On the warmest days of the month, the temperature usually reaches around
20 °C. However, it reached
23 °C in December 2010.
Precipitation amounts to
90 mm, distributed over 10 days.
The day lasts on average 9 hours and 35 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 3.5 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
20.8 kph.
The average sea temperature is of
17 °C. Therefore, the sea is cold for swimming.