Symi weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: June – October
What is the weather like in Symi in September?
In September, Symi is hot: daytime highs average 27 °C, and even at night it stays warm at around 24 °C. The sea averages 25.5 °C – pleasant for swimming. With around 10 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. All in all, September is an excellent month for a holiday in Symi.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 100 | 100 | 85 |
| Day | 30° | 27° | 24° |
| Night | 26° | 24° | 20° |
| Sea | 26° | 26° | 24° |
| Sun | 11 h | 10 h | 8 h |
| Rain days | 0 | 1 | 5 |
More details for September
- Daylight
- 12 h 28 min06:50 – 19:18
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 21 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 8 %on averageAll months
- Hot days
- 2 days30 °C or moreAll months
- Time zone
- UTC+3Europe/Athens
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- 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 September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
Symi in September: quick answers
Is Symi hot in September?
Yes. In September, Symi is hot: daytime highs average 27 °C and nights stay around 24 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Symi in September?
Yes. In September the sea averages 25.5 °C – pleasant for swimming.
Does it rain much in Symi in September?
It hardly ever rains.
Symi month by month
The whole year in SymiAll destinations: GreeceGreek Islands weather in SeptemberWhere to go in SeptemberSea temperature in September
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