Position of Naxos

In Naxos, an island of the Cyclades, the climate is Mediterranean, with mild and rainy winters, and warm and sunny summers. The average temperature of January and February is 12 °C (53.5 °F), that of July and August is 24.5 °C (76 °F).
Here are the average temperatures.
Naxos - Average temperatures
Min (°C)10910121620222220171411
Max (°C)141516192226272725221916
Min (°F)504850546168727268635752
Max (°F)575961667279818177726661

The island is windy, and in summer it is cooled by a frequent wind blowing from the north. The wind has been exploited for centuries by windmills.
Precipitation follows the Mediterranean pattern, so it is concentrated from October to March, and is not abundant, since it amounts to about 500 millimetres (20 inches) per year, and this is confirmed by the aridity of the landscape. In summer it practically never rains.
Here is the average precipitation.
Naxos - Average precipitation

The interior of the island is occupied by hills, and also by a low mountain ridge, culminating in Mount Zas (Zeus), 1,004 metres (3,294 feet) high.

Mount Zas

Winter, from December to mid-March, is mild, quite rainy and windy. The wind, frequent and sometimes intense, intensifies the feeling of cold. Sometimes, cold air masses from the Balkan Peninsula can bring cold days, with highs below 10 °C (50 °F), and sometimes even snow can fall.

Spring, from mid-March to May, is mild and sunny, and also quite windy. From mid-May the Meltemi starts to blow: it is a persistent wind, cool and dry, blowing from the north for a few days in a row, especially in 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 also in the evening. With this wind, the maximum temperature remains almost always below 30 °C (86 °F), and even in the hottest periods, when in other parts of Greece the temperature can reach or exceed 40 °C (104 °F), here it stops at 33/35 °C (91/95 °F).

Autumn, from mid-September to November, is initially warm and sunny, but gradually becomes cooler and rainier. Autumn too is windy: as long as the weather is nice, the Meltemi still blows, while later the southern wind blows, brought by depressions coming from the Atlantic Ocean or the Mediterranean Sea.

Naxos, old town

The amount of sunshine in Naxos is excellent in summer, when clear skies prevail, while it's not high from November to February, when the sky is often cloudy, although sunny days may occur also in midwinter.
Naxos - Sunshine

The temperature of the sea is never very high, because the wind blowing in summer tends to keep it a bit low; however, it reaches a maximum of 23 °C (73 °F) from July to September; in June it's still a bit cool, about 21 °C (70 °F).
Here are the average sea temperatures.
Naxos - Sea temperature
Temp (°C)161515161821232323211817
Temp (°F)615959616470737373706463

When to go

The best time to go to Naxos for a beach holiday 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.
Spring, in April and May, is fine for visiting the towns, or for excursions in search of the remains of ancient Greece, but since it's almost never very hot, you can usually stroll through the island also in summer, which we usually do not recommend in Mediterranean climates, and generally in places where in summer it can be hot.

Back to the Cyclades Islands.