Syros weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Excellent
Best time to visit: July – September
What is the weather like in Syros in July?
In July, Syros is warm: daytime highs average 26 °C, and even at night it stays warm at around 23 °C. The sea averages 23.8 °C – pleasant for swimming. With around 12 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. It is often windy, with gusts of around 34 km/h. All in all, July is an excellent month for a holiday in Syros.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 31 min06:10 – 20:42
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 25 daysdew point 18 °C or moreAll months
- Wind
- 34 km/haverage daily peakAll months
- Cloud cover
- 2 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+3Europe/Athens
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %97 %
- Sunshineweight 20 %100 %
- 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 July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Windproof jacket
Syros in July: quick answers
Is Syros hot in July?
Warm rather than hot: in July, daytime highs in Syros average 26 °C and nights cool to about 23 °C.
Can you swim in Syros in July?
Yes. In July the sea averages 23.8 °C – pleasant for swimming.
Does it rain much in Syros in July?
It hardly ever rains.
Syros month by month
The whole year in SyrosAll destinations: GreeceGreek Islands weather in JulyWhere to go in JulySea temperature in July
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