Fethiye (Oludeniz) weather in September
September in Fethiye: sweltering, dry, with clean air — fine if you can take 35°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#1 of 12 months in Fethiye · #5 of 1413 destinations to visit in September · comfort 96/100 (tier S)
- Days
- 32°C
- Nights
- 22°C
- Wet days
- 4
- Sun
- 11.5 h
- Humidity
- 60%
- Daylight
- 12 h
Traveller notes on Fethiye in September
Forum posters describe September as lovely and very popular - not as scorching as July/August but still warm, with sea and pools fully warmed up from the summer and ideal for swimming. By late September, posters report daytime highs still reaching the mid-30sC in some years, bearable rather than oppressive, while nights cool down enough that evening layers become worth packing. Brief rain is possible but posters say it typically passes quickly with conditions returning to hot and sunny shortly after. Overall, forum consensus consistently ranks September among the best months to visit Fethiye specifically for the combination of warm beach weather and thinning summer crowds.
Other months in Fethiye
Fethiye's forum describes March as genuinely warm in direct sun but noticeably cold in the shade, since the mountains behind town are still snow-capped this time of year - one poster specifically flagged that contrast as catching visitors off guard. It's considered an excellent month for exploring the Lycian ruins under clear blue skies without summer heat or crowds, but the sea itself is still too cold for swimming and pools aren't heated yet. An odd rainstorm can roll through, so pack layers rather than committing to shorts and a t-shirt all day.
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Fethiye climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Fethiye in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsSwimming season, Summer holidays in Turkey, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Fethiye's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherFethiye's best weather comes in June, September and October — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Fethiye in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Blue cruise season
1 May – 15 Oct · usuallySummer season opensBook earlyThe gulets come out of winter lay-up in Fethiye and Göcek harbours and the twelve-island runs start going daily. Book the smaller boats ahead; the big day-trip ones you can walk on to. Source ↗
- Season
Swimming season
15 Jun – 31 Oct · usuallySea warm enoughCrowdedÖlüdeniz lagoon and Kabak are comfortable without a wetsuit and stay that way into late October, well after the package flights have thinned. The lagoon charges an entry fee. Source ↗
- Season
Lycian Way, autumn
20 Sep – 15 Nov · usuallyTrail seasonThe second walking window, shorter than the spring one, with warmer sea at the end of each day. Water on the higher sections is the thing to plan around. Source ↗
Nearby, and something's on
Within 300 km of Fethiye — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Fethiye?
Fethiye in September — FAQ
- Is September a good time to visit Fethiye?
- September in Fethiye: sweltering, dry, with clean air — fine if you can take 35°C afternoons. It ranks #1 of 12 months for Fethiye on SeasonMap's comfort score (96/100).
- What is the weather like in Fethiye in September?
- In September, Fethiye averages a daily high of 32.4°C and a low of 21.5°C, with about 13.8 mm of rain over roughly 3.8 rainy days.
- What is the air quality in Fethiye in September?
- Fethiye has a mean US Air Quality Index of about 43 in September.
Within 300 km: Kaş's Loggerhead nesting at Patara on 1 May – 30 Sep, and Rhodes' Moths at Petaloudes around 15 Jun – 15 Sep.