Syros weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Fair
Best time to visit: July – September
What is the weather like in Syros in October?
In October, Syros is mild: daytime highs average 20 °C, and nights cool down to about 18 °C. The sea averages 21.7 °C – refreshing for a swim. The sun shines for around 7 hours a day. Rain is rare: about 4 days bring 29 mm in total. It is often windy, with gusts of around 33 km/h. All in all, October is a so-so month for a holiday in Syros.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 92 | 59 | 32 |
| Day | 24° | 20° | 17° |
| Night | 21° | 18° | 15° |
| Sea | 24° | 22° | 19° |
| Sun | 9 h | 7 h | 5 h |
| Rain days | 1 | 4 | 6 |
More details for October
- Daylight
- 11 h 18 min07:27 – 18:45
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 5 daysdew point 18 °C or moreAll months
- Wind
- 33 km/haverage daily peakAll months
- Cloud cover
- 31 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+3Europe/Athens
How the score comes together
- Temperatureweight 35 %22 %
- Seaweight 25 %67 %
- Sunshineweight 20 %72 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Windproof jacket
Syros in October: quick answers
Is Syros hot in October?
No. In October, Syros is mild: daytime highs average 20 °C and nights drop to about 18 °C.
Can you swim in Syros in October?
Yes. In October the sea averages 21.7 °C – refreshing for a swim.
Does it rain much in Syros in October?
Rain is rare: about 4 days bring 29 mm in total.
Syros month by month
The whole year in SyrosAll destinations: GreeceGreek Islands weather in OctoberWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences