Kos Weather May
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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the British News Desk weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Kos weather in May brings warm, settled conditions as spring gives way to early summer, with average highs around 25°C and plenty of sunshine. The live forecast above shows current conditions for this Greek island, where sea temperatures begin to reach a comfortable 20°C by late month.
What is the typical weather in Kos during May?
May marks the transition from the island’s mild spring to its dry summer season. You can expect long, sunny days with minimal rainfall — typically only two or three wet days across the entire month. The Meltemi wind, a seasonal northerly breeze, begins to pick up in the latter half of May, providing natural cooling along the coast. This makes Kos weather in May ideal for beach visits and outdoor exploration without the peak heat of July or August.
What should you pack for Kos weather at the end of May?
By late May, daytime temperatures regularly reach 26–28°C, so light clothing, sun protection and a hat are essential. Evenings remain cooler, often dropping to around 16°C, so a light jacket or cardigan is useful. The sea is swimmable but not yet fully warm for prolonged sessions — a factor worth checking if you are considering Marmari Kos weather May conditions for water sports. Those looking at kos weather may accuweather comparisons will find similar consistency across forecast sources.
Is Kos weather good in June compared to May?
June is hotter and drier, with average highs of 30°C and virtually no rain. May offers slightly milder temperatures and fewer crowds, making it a better choice for active sightseeing.
Does Kos weather in May feel humid?
Humidity is low to moderate, typically around 55–60%. The Meltemi wind helps keep the air comfortable, so it rarely feels sticky or oppressive during this month.
Can you swim in Kos in late May?
Yes, but the sea is on the cooler side. Many visitors find it refreshing, though some prefer the warmer waters of June. Beaches with shallower bays tend to be slightly warmer.
Sources
For more seasonal outlooks, see our UK weather hub or explore Crete Weather for similar May patterns. Those planning trips further ahead can check Malta Weather or 10 Day Weather Forecast UK for broader context.
