Mykonos weather by month: when is the best season?
A month-by-month Mykonos weather table, sea temperature, and when to go: June and September are the best balance.
- June and September: 26–27°C by day, a warm sea and almost no rain.
- July–August: peak season, hottest and most expensive, with meltemi winds.
- November–March: cool and relatively rainy, and most businesses are closed.
If you want a warm sea without the August crowds, aim for late June or September. In summer check the wind before sailing, and out of season confirm in advance that your hotel and restaurants are open.
Mykonos weather by month
The table shows long-term averages from Climates to Travel: night and day temperature, rain days per month and sea temperature.
| Month | Temp (night–day) | Rain days | Sea |
|---|---|---|---|
| Jan | 9–13° | 10 | 16° |
| Feb | 9–13° | 8 | 16° |
| Mar | 11–15° | 7 | 15° |
| Apr | 13–18° | 5 | 16° |
| May | 17–22° | 3 | 18° |
| Jun | 21–27° | 1 | 22° |
| Jul | 23–28° | 0 | 24° |
| Aug | 23–28° | 0 | 24° |
| Sep | 21–26° | 2 | 23° |
| Oct | 18–22° | 5 | 21° |
| Nov | 14–18° | 6 | 19° |
| Dec | 11–14° | 10 | 17° |
These are averages, not a forecast. For the next few days check our Mykonos page, where the weather updates live.
When is the best season in Mykonos?
- June and September: the best balance. Warm (26–27°C by day), the sea is already warm (22–23°C) and there is almost no rain. September is less crowded than August.
- July and August: peak season. 28°C by day, no rain days, the most parties and beach clubs, and the highest prices.
- May and early October: pleasant for walking and the town, but the sea is still or already cool (18–21°C).
- November to March: cool, with relatively many rain days, and most hotels, restaurants and beach clubs are closed.
Mykonos in September
September is one of the most popular months with Israelis: 21–26°C, a 23°C sea and almost no rain. Beach clubs usually stay open until mid-September, after which the island gets quieter.
Mykonos in May and March
March is still winter on the island: 11–15°C and about seven rain days a month. The island wakes up in April, and according to SantoriniDave about 75% of tourism businesses are open by the end of April. May brings 17–22°C, but the sea is still cool for swimming (about 18°C).
Wind in Mykonos
Mykonos is known for its strong summer north winds (the meltemi), mainly in July and August. On a windy day choose a beach on the south side of the island; ferries may be delayed or cancelled. Check before sailing and see our guide to ferries in Greece.
Coming out of season?
See our separate guide to Mykonos off season. To compare all of Greece month by month, see Greece weather.
FAQ
What is the weather like in Mykonos in September? On average 21–26°C, a sea of about 23°C and about two rain days in the month. It is one of the best months to visit.
When does the season start in Mykonos? The island reopens gradually in April, and by May most places are open. Beach clubs mainly run from late June to mid-September.
Can you swim in Mykonos in May? Yes, but the water is cool, about 18°C on average. From late June the sea is warmer, 22°C and above.
