When to go · Kos
Kos, month by month
The best months for Kos: May, Jun, Sep, Oct. Months to avoid: Jul, Aug.
Month by month
- JanuaryMixedOutside the best window (May–Jun, Sep–early Oct). Across Greece: Athens mild and quiet; most island hotels closed and ferries reduced; mountain villages cold with snow.14 °C / 8 °C, 12 rain days57 °F / 46 °F, 12 rain daysCrowds: Low
- FebruaryMixedOutside the best window (May–Jun, Sep–early Oct). Across Greece: Carnival season (Apokries) with the big parade in Patras; islands still closed.14 °C / 8 °C, 10 rain days57 °F / 46 °F, 10 rain daysCrowds: Low
- MarchMixedOutside the best window (May–Jun, Sep–early Oct). Across Greece: Clean Monday kite-flying and Independence Day parades (25 March); sea too cold for most.16 °C / 9 °C, 8 rain days61 °F / 48 °F, 8 rain daysCrowds: Low
- AprilGoodOutside the best window (May–Jun, Sep–early Oct). Across Greece: Wildflowers and good walking; Orthodox Easter (12 April 2026, 2 May 2027) fills ferries and rooms. Islands start reopening.20 °C / 12 °C, 6 rain days68 °F / 54 °F, 6 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Kos's best window: May–Jun, Sep–early Oct.24 °C / 15 °C, 4 rain days75 °F / 59 °F, 4 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Kos's best window: May–Jun, Sep–early Oct.29 °C / 19 °C, 2 rain days84 °F / 66 °F, 2 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Aug (heat, crowds, peak prices).32 °C / 22 °C, 1 rain days90 °F / 72 °F, 1 rain daysCrowds: High
- AugustAvoidListed as a month to avoid: Jul–Aug (heat, crowds, peak prices).32 °C / 22 °C, 1 rain days90 °F / 72 °F, 1 rain daysCrowds: High · 1 festival or holiday
- SeptemberGreatInside Kos's best window: May–Jun, Sep–early Oct.29 °C / 20 °C, 2 rain days84 °F / 68 °F, 2 rain daysCrowds: Medium
- OctoberGreatInside Kos's best window: May–Jun, Sep–early Oct.24 °C / 16 °C, 5 rain days75 °F / 61 °F, 5 rain daysCrowds: Low
- NovemberMixedOutside the best window (May–Jun, Sep–early Oct). Across Greece: Rain arrives; islands largely shut; 17 November marches in Athens. Good for Athens museums.19 °C / 13 °C, 8 rain days66 °F / 55 °F, 8 rain daysCrowds: Low
- DecemberMixedOutside the best window (May–Jun, Sep–early Oct). Across Greece: Athens and Thessaloniki festive and cheap; mountain villages busy at Christmas; islands closed.15 °C / 10 °C, 12 rain days59 °F / 50 °F, 12 rain daysCrowds: Low