When to go · Syros
Syros, month by month
The best months for Syros: May, Jun, Jul, Aug, Sep, Oct.
Month by month
- JanuaryMixedOutside the best window (May–Oct). Across Greece: Athens mild and quiet; most island hotels closed and ferries reduced; mountain villages cold with snow.13 °C (55 °F) / 9 °C (48 °F), 6 rain days55 °F (13 °C) / 48 °F (9 °C), 6 rain daysCrowds: Low
- FebruaryMixedOutside the best window (May–Oct). Across Greece: Carnival season (Apokries) with the big parade in Patras; islands still closed.13 °C (55 °F) / 9 °C (48 °F), 5 rain days55 °F (13 °C) / 48 °F (9 °C), 5 rain daysCrowds: Low
- MarchMixedOutside the best window (May–Oct). Across Greece: Clean Monday kite-flying and Independence Day parades (25 March); sea too cold for most.15 °C (59 °F) / 11 °C (52 °F), 5 rain days59 °F (15 °C) / 52 °F (11 °C), 5 rain daysCrowds: Low
- AprilGoodOutside the best window (May–Oct). Across Greece: Wildflowers and good walking; Orthodox Easter (12 April 2026, 2 May 2027) fills ferries and rooms. Islands start reopening.18 °C (64 °F) / 14 °C (57 °F), 4 rain days64 °F (18 °C) / 57 °F (14 °C), 4 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Syros's best window: May–Oct.23 °C (73 °F) / 18 °C (64 °F), 3 rain days73 °F (23 °C) / 64 °F (18 °C), 3 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Syros's best window: May–Oct.27 °C (81 °F) / 22 °C (72 °F), 2 rain days81 °F (27 °C) / 72 °F (22 °C), 2 rain daysCrowds: High
- JulyGreatInside Syros's best window: May–Oct.30 °C (86 °F) / 25 °C (77 °F), 2 rain days86 °F (30 °C) / 77 °F (25 °C), 2 rain daysCrowds: High
- AugustGreatInside Syros's best window: May–Oct.30 °C (86 °F) / 25 °C (77 °F), 3 rain days86 °F (30 °C) / 77 °F (25 °C), 3 rain daysCrowds: High · 1 festival or holiday
- SeptemberGreatInside Syros's best window: May–Oct.27 °C (81 °F) / 22 °C (72 °F), 4 rain days81 °F (27 °C) / 72 °F (22 °C), 4 rain daysCrowds: Medium
- OctoberGreatInside Syros's best window: May–Oct.23 °C (73 °F) / 18 °C (64 °F), 5 rain days73 °F (23 °C) / 64 °F (18 °C), 5 rain daysCrowds: Low
- NovemberMixedOutside the best window (May–Oct). Across Greece: Rain arrives; islands largely shut; 17 November marches in Athens. Good for Athens museums.18 °C (64 °F) / 13 °C (55 °F), 6 rain days64 °F (18 °C) / 55 °F (13 °C), 6 rain daysCrowds: Low
- DecemberMixedOutside the best window (May–Oct). Across Greece: Athens and Thessaloniki festive and cheap; mountain villages busy at Christmas; islands closed.14 °C (57 °F) / 10 °C (50 °F), 6 rain days57 °F (14 °C) / 50 °F (10 °C), 6 rain daysCrowds: Low
Compare two months
Weather, crowds and prices for any two months in Syros, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 23 °C (73 °F)73 °F (23 °C)
Jun: 27 °C (81 °F)81 °F (27 °C)
Night low
May: 18 °C (64 °F)64 °F (18 °C)
Jun: 22 °C (72 °F)72 °F (22 °C)
Rain days
May: 3
Jun: 2 (better)
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Syros's best window: May–Oct.
June: Inside Syros's best window: May–Oct.
Syros: figures are long-term averages from this guide, not a forecast.