İzmir 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: April – May, September – October
What is the weather like in İzmir in September?
In September, İzmir is hot: daytime highs average 30 °C, and nights cool down to about 18 °C. The sea averages 23.0 °C – pleasant for swimming. With around 10 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 27 mm in total. On about 14 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in İzmir.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 51 | 84 | 92 |
| Day | 35° | 30° | 23° |
| Night | 22° | 18° | 13° |
| Sea | 24° | 23° | 21° |
| Sun | 12 h | 10 h | 8 h |
| Rain days | 1 | 3 | 6 |
More details for September
- Daylight
- 12 h 30 min06:52 – 19:22
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 3 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 15 %on averageAll months
- Hot days
- 14 days30 °C or moreAll months
- Time zone
- UTC+3Europe/Istanbul
How the score comes together
- Temperatureweight 50 %67 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
İzmir in September: quick answers
Is İzmir hot in September?
Yes. In September, İzmir is hot: daytime highs average 30 °C and nights stay around 18 °C. On about 14 days the thermometer climbs to 30 °C or more.
Can you swim in İzmir in September?
Yes. In September the sea averages 23.0 °C – pleasant for swimming.
Does it rain much in İzmir in September?
Rain is rare: about 3 days bring 27 mm in total.
İzmir month by month
The whole year in İzmirAll destinations: TurkeyWhere 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