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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Civic Affairs weather desk. Data from national met services via Open-Meteo.
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Check the live forecast above for the most current Mykonos weather before you travel or plan your week. The island’s Mediterranean climate brings reliably hot, dry summers and mild, wet winters, so the best time to visit depends on whether you prefer peak heat or quieter shoulder seasons.
What drives the weather in Mykonos across the year?
Mykonos sits in the Cyclades group and has a classic Mediterranean climate. Summers from June to September are hot and almost rainless, with daytime highs typically between 28°C and 30°C, moderated by the northerly Meltemi wind. Winters are mild, with December to February highs around 14–16°C and most annual rainfall concentrated in these months. Spring and autumn are transitional, offering warm days and cooler evenings – mykonos weather september still feels summery, while mykonos weather october sees temperatures easing to around 22–24°C with more cloud and occasional showers.
When should you plan a trip for the best conditions?
For guaranteed heat and minimal rain, June through September is the peak window. Mykonos weather june is hot, dry and less windy than July and August, making it a favourite for beachgoers. If you prefer quieter streets and milder heat, May and October work well – mykonos weather october can still deliver pleasant beach weather early in the month. For a broader view of regional patterns, see our Crete weather guide. Travellers from the UK can also check the 10 day weather forecast UK for comparison before departure. Mykonos weather monthly averages show the widest temperature swings between summer highs and winter lows, so packing layers is wise outside the core summer months.
Does Mykonos get very windy in summer?
Yes, the Meltemi wind is a defining feature from mid-June to August. It often reaches force 4–6 on the Beaufort scale, offering welcome cooling but also disrupting some ferry routes and making open-sea swimming less calm.
What is Mykonos like in October weather-wise?
Mykonos weather october is mild and more changeable. Daytime highs average 22–24°C, sea temperatures remain around 22–23°C early in the month, and rainfall increases as autumn sets in. It is still a good time for quiet sightseeing.
Can you swim in the sea around Mykonos in September?
Yes – September sea temperatures typically reach 24–26°C, making swimming very comfortable. The weather stays warm and sunny, with lower wind intensity than July and August, so it is a popular month for beach holidays.