Position of Skyros in the map

The climate of Skyros, the southernmost of the Sporades, is Mediterranean, with relatively mild, rainy winters and warm, sunny summers. The island is not as warm as the southern Greek islands, it is windy, and in winter, it is subject to outbreaks of cold air from the Balkan Peninsula.
Here are the average temperatures.
Skyros - Average temperatures
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Min (°C)77811151921221915129
Max (°C)121314182226282725211714
Min (°F)454546525966707266595448
Max (°F)545557647279828177706357

Precipitation follows the Mediterranean pattern, in fact, it is more frequent from November to March, and it's not abundant, since it does not reach 450 millimeters (17.5 inches) per year. In summer, the rains are very rare, and occur in the form of short downpour or thunderstorm. The southern part of the island is drier than the northern one, and has a particularly arid landscape. Here is the average precipitation.
Skyros - Average precipitation
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Prec.(mm)7555502515551020355580430
Prec.(in)32.2210.60.20.20.40.81.42.23.116.9
Days1299752223791380

Winter, from December to mid-March, is not so mild: there are many days with highs below 10 °C (50 °F) and with a moderate or even strong wind. Furthermore, every so often, it can get very cold, and it can even snow, although frosts almost never occur because of the influence of the sea.
However, there are also mild periods, with highs around 15/18 °C (59/64 °F).
The rains are quite frequent.

Snow in Skyros

Spring, from mid-March to May, is a pleasant season, mild and sunny, but some periods can be a bit cold, windy and rainy, which gradually become less frequent.

Summer, from June to mid-September, is warm and sunny, with very few showers. Generally, the maximum temperature is below 30 °C (86 °F), and the temperature is almost always acceptable because of the prevailing wind, which blows from the north. The Meltemi blows with a certain intensity in periods of a few days, but less so than in the Cyclades. Very hot days are rare: occasionally, less than once a year, the temperature can exceed 35 °C (95 °F), as happened in July 2011, when it reached 37 °C (99 °F), and in July 1988, when it reached 38 °C (100 °F).

Autumn, from mid-September to November, is pleasantly warm at first, then gradually becomes milder. The rains gradually become more frequent, although there are long periods without rain still in October. In November, the first days a bit cold and windy can occur, and sometimes also in October.

Skyros

The amount of sunshine in Skyros is very good in summer, and also in May and September, when clear skies prevail, while in the rest of the year, it's not so remarkable, since there are several cloudy periods. Here are the average sunshine hours per day.
Skyros - Sunshine
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Hours45681012131210754

The temperature of the sea, still cold in May and cool in June, becomes acceptable for swimming from June to September, and reaches a peak in August of 24 °C (75 °F). Here are the average sea temperatures.
Skyros - Sea temperature
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Temp (°C)151414151821232423211816
Temp (°F)595757596470737573706461

Best Time


The best time to go to Skyros for a beach holiday is the summer, from June to mid-September. In June and September, and sometimes in early July, there can be some cool evenings, so it's better to bring a sweatshirt.
In May, not only the sea is cold, but there can also be some cool days, with highs below 20 °C (68 °F), especially in the first part of the month.
If you want to go on excursions on the island, to visit the castle or the Byzantine monastery, or to climb Mount Olympus, 400 meters (1,300 feet) high, the summer temperatures are generally acceptable, in fact, they are not too high, however, you can also go in May.

Back to the Sporades Islands.