Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the ScopePress weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Based on the live forecast above, daytime temperatures on Kos range from the low 20s °C in May to the low 30s °C in July and August. These values point to a classic Mediterranean summer climate with very reliable dry, hot weather from June through September.
What is the typical monthly breakdown for Kos weather?
Kos weather by month shows a clear warm season from May to October. June, July and August are the hottest months, with average highs of 28–33 °C and almost zero rainfall. For those looking further ahead, a kos weather forecast 21 days or kos weather 30 days will confirm this settled summer pattern. Spring (April–May) and autumn (September–October) are milder, with daytime temperatures around 20–26 °C and a low chance of short showers. Winter months see averages of 14–16 °C, with occasional rain but still many sunny intervals.
How reliable are longer-range forecasts for Kos?
Forecasts beyond 10 days carry lower confidence, but the seasonal trend is consistent. A kos weather forecast 15 day or kos weather 25 day forecast from reputable sources can give a useful indication of the general pattern — typically warm and dry in summer, cooler and wetter in winter. For the most accurate planning, use the kos weather 10 days view alongside the live forecast above, and check kos weather radar for any short-term changes if rain is possible.
What is the best month for a Kos beach holiday?
June and September offer the best balance: high temperatures around 28–30 °C, calm seas, and fewer crowds than July–August. For guaranteed heat, July is the hottest month but can feel breezy.
Does Kos have a rainy season?
Yes, from November to March. December and January are the wettest, with about 8 rainy days per month. Even then, rain often arrives in short bursts followed by sun. A kos weather 14 days check is useful before winter travel.
How accurate is a kos weather forecast 21 days?
Reliable for trend direction but not exact daily details. In summer the pattern is so stable that a 21‑day outlook generally shows continued heat. In winter, confidence drops significantly after 10–15 days.
For more on nearby destinations, see our Crete Weather page and the 10 Day Weather Forecast UK hub. Compare Kos with Antalya Weather for a different Mediterranean experience.