Map from Google - Milos

In Milos, the most south-western island of the Cyclades, and in the nearby islands of Kimolos, Polyaigos and Antimilos, the climate is Mediterranean, with mild, rainy winters and warm, sunny summers. The average temperature of January and February is 11.5 °C (52.5 °F), that of July and August is 25 °C (77 °F).
Here are the average temperatures.
Average temperatures - Milos
MilosJanFebMarAprMayJunJulAugSepOctNovDec
MilosJFMAMJJASOND
Min (°C)9910131620222220161311
Max (°C)141415192327292826221815
Min (°F)484850556168727268615552
Max (°F)575759667381848279726459

The island is windy, and in summer it is cooled by a frequent wind from the north. The wind has been exploited for centuries by windmills.
Precipitation follows the Mediterranean pattern, so it's concentrated from October to March, and is not abundant, since it amounts to about 410 millimetres (16 inches) per year, and this is confirmed by the aridity of the landscape. In summer it practically never rains.
Here is the average precipitation.
Average precipitation - Milos
MilosJanFebMarAprMayJunJulAugSepOctNovDecYear
MilosJFMAMJJASONDY
Prec. (mm)75504520153016456090411
Prec. (in)321.80.80.60.1000.21.82.43.516.2
Days97631000146946

The interior of the island is flat in the east, while the west is occupied by hills, whose highest point is Mount Profitis Elias, 748 metres (2,454 feet) high. The island is volcanic in origin, and is characterized by a lunar landscape, with rocky terrain, caves and sulfur springs.

Winter, from December to mid-March, is mild, quite rainy and windy. The wind, frequent and sometimes intense, exacerbates the feeling of cold. Sometimes, the area can be affected by cold air from the Balkans, so that there can be cold days, with highs below 10 °C (50 °F), and sometimes even snow can fall, although generally there is no accumulation in the plains, and at night the temperature almost never falls below freezing (0 °C or 32 °F).

Spring, from mid-March to May, is mild and sunny, and also quite windy. In mid-May the Meltemi starts to blow, a persistent wind, cool and dry, blowing from the north for a few days in a row, especially during the daytime, but sometimes even at night.

Summer, from June to mid-September, is warm and sunny, but also windy. The Meltemi blows for long periods, especially in July and August, and is stronger in the afternoon, but can insist even in the evening. Thanks to this wind, the maximum temperature remains almost always below 30 °C (86 °F), even though we can not be exclude periods with temperatures about 35/36 °C (95/97 °F), and very rarely also peaks of 40 °C (104 °F).

Autumn, from mid-September to November, is initially warm and sunny, but then gradually becomes cooler and with more rain. Even autumn is windy: as long as the weather is good, the Meltemi still blows, while later the wind blows along with disturbances from the Atlantic Ocean or the Mediterranean Sea.

The amount of sunshine in Milos is excellent in summer, when clear skies prevail, while it's not much from November to February, when the sky is often cloudy, although sunny days may still occur even in midwinter.

Tsigrado beach, Milos

The temperature of the sea is never very high, however it is warm enough for swimming from July to September, and reaches 24 °C (75 °F) in August; in June it's still a bit cool, about 21 °C (70 °F).
Here are the average sea temperatures.
Sea temperature - Milos
MilosJanFebMarAprMayJunJulAugSepOctNovDec
MilosJFMAMJJASOND
Sea (°C)161515161821232423221917
Sea (°F)615959616470737573726663

When to go

The best time to go to Milos for beach life is the summer, from June to mid-September.
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 may feel a bit cool even in July and August.
For excursions, you can go in spring, in April and May, but since usually it's not too hot, you can stroll around the island even in summer.

Back to the Cyclades Islands.