Weather in Turkey in September

September climate overview

Daytime highs across Turkey in September run from 22.7°C (Side) to 31.2°C (Belek). In Belek about 98% of September days reach 25°C. Nights average 19.7°C; the coldest 10% of nights in Side fall to 14°C or below.

Rainfall in September

Expect around 4 rainy days (1 mm or more) in September, with Belek the driest (2 days) and Side the wettest (14 days). The wettest September at Belek between 1991 and 2020 was 2006 with 69 mm; the driest was 1991 with 0 mm.

Sea temperature

The sea averages 25.5°C around Turkey in September - warmest at Alanya (27.9°C). That is comfortable for swimming.

Sunshine and daylight

Around 10.3 hours of sunshine a day on average, out of 12.2 hours of daylight (sunshine estimated from cloud cover).

September against the rest of the year in Turkey

September is the 4th warmest month of the twelve in Turkey. It is 3.4°C cooler than August and 4.6°C cooler in October. The hottest month here is August (31°C) and the coolest January (12°C).

Which part of Turkey in September?

• Most sunshine: Dalaman, 11.1 h a day.
• Driest: Belek, about 2 rainy days.
• Warmest sea: Alanya, 28°C.
• Hottest: Belek, 31°C by day.
• Coolest (better for walking and cities): Side, 23°C.

What to pack for Turkey in September

Based on the averages: summer clothes for the day; swimwear - the sea is 25°C.

Similar weather elsewhere in September

Within 1.5°C of Turkey's September daytime average: Boa Vista (29°C, sea 27°C), Aruba (29°C, sea 29°C), Cancun (29°C, sea 29°C), Miami (29°C, sea 29°C), St Lucia (29°C, sea 29°C). See the full ranking for September.

Where to go for warm seas

For swimming warmth, Belek, Antalya and Lara Beach are strong choices, with sea temperatures of 28°C. Belek is the hottest option at 31°C by day, so it suits travellers who actively want heat rather than simply pleasant outdoor weather. Alanya offers the same sea temperature with a lower daytime average of 28°C, although rain is a little more frequent. Fethiye is another option for warm-water swimming at 27°C. Dalaman, Marmaris, Dalyan and Sarigerme have seas averaging 26°C. Kusadasi has a different balance: its 30°C days are hot, but the sea is noticeably cooler at 23°C. Pick it if a more refreshing swim appeals.

Expect hot afternoons and warm evenings

Pack mainly for heat, but let your destination guide what you bring for evenings. The country average is 20°C at night, so light clothing should remain useful after sunset; a light layer is a sensible addition if you feel the cool. Marmaris stays warmer overnight at 22°C, while Fethiye averages 19°C. During the day, the 30°C averages in Antalya, Dalaman and several other destinations make shade and breaks sensible around midday. Plan more active outings for the cooler parts of the day, and keep sun protection handy. September suits travellers comfortable with hot afternoons, not just those seeking gentle warmth.

Mostly dry, but leave room for a shower

Rain is unlikely to dominate a September holiday in the destinations listed, but dry weather is not guaranteed. Antalya, Belek, Dalaman and Kusadasi each average 2 rainy days, making them sensible choices if outdoor plans are your priority. Fethiye averages 3, while Alanya has 4, matching the country average. With average sunshine of 10.3 hours, there is plenty of scope for beach time without spending every sunny hour in the heat. Keep plans flexible enough to swap an outdoor afternoon if rain arrives. A small rain layer is reasonable to pack, but hot-weather clothing deserves most of the space in your bag.