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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Morning Times weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
May in Kos is warm and sunny, with average highs around 24°C – check the live forecast above for exact readings. It’s a reliable month for beach days and exploring, with long daylight hours and low rainfall.
What is the weather like in Kos in May?
Days are comfortably warm, often reaching 24–26°C in the afternoon. Sea temperatures hover near 19°C, making swimming possible but still brisk. Rain is rare – expect only two or three wet days across the month. Evenings stay mild, around 15°C, so a light jacket is useful.
How does May compare to June?
June is hotter, with average highs climbing to 29°C, and the sea warms to about 23°C. For those who prefer less intense heat, kos weather may june transitional period offers a sweet spot. If you’re checking kos weather june forecasts, note that May still has fewer crowds and lower prices, while June guarantees peak summer conditions.
Is May a good time to visit Kos?
Yes – the weather is warm and settled, with plenty of sunshine. It’s quieter than July and August, so you’ll find more space on beaches and at sites like Asklepion. Pack light layers for cooler evenings.
What should I pack for Kos in May?
Bring summer clothes, swimwear, sun cream and a light jacket or jumper for after sunset. A windproof layer is useful if you’re heading to marmari kos weather may spots, where a breeze can pick up along the coast.
How accurate are long-range forecasts for Kos in May?
Five‑to‑ten‑day forecasts are reliable for general trends, but day‑to‑day reliability drops beyond two weeks. Sites like kos weather may accuweather provide hourly breakdowns, though local conditions can shift quickly.