SeasonMapSkiathos weather in September
Greece
September in Skiathos: warm, rainy, with clean air — an excellent time to visit.
#4 of 12 months in Skiathos · #457 of 1383 destinations to visit in September · comfort 86/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Skiathos in September
Other months in Skiathos
Skiathos's forum calls July hot and mostly dry, daily highs in the high 20s°C easing only into the mid-20s after dark, with any rain arriving in short, sporadic bursts rather than washing out a day. Regulars flag the UV as genuinely strong — sun protection isn't optional — and credit the sea breeze with making al fresco dinners and beach afternoons bearable during what's both the hottest and busiest month.
Add your own note from Skiathos's card on the map.
Skiathos climate normals — September
| Daytime high | 25°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Feels like (high) | 26°C / 79°F | |
| Sea temperature | 25°C / 76°F | 🙂 pleasant |
| Rainfall | 87 mm / 3.4 in | 🌧 rainy |
| Rainy days | 5 days | |
| Humidity | 70% | 💧 humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 12.4 h | |
| Wind | 26 km/h / 16 mph | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Skiathos 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.
BusySummer holidays in Greece, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Skiathos'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).
Fair weatherSkiathos's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Skiathos in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Sea warm enough to swim
10 Jun – 5 Oct · usuallySheltered Aegean water inside the Sporades, warm from June to early October. The pine-backed south-coast bays swim on days when the exposed north side is closed out.
Nearby, and something's on
Within 300 km of Skiathos — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Skiathos?
Skiathos in September — FAQ
- Is September a good time to visit Skiathos?
- September in Skiathos: warm, rainy, with clean air — an excellent time to visit. It ranks #4 of 12 months for Skiathos on SeasonMap's comfort score (86/100).
- What is the weather like in Skiathos in September?
- In September, Skiathos averages a daily high of 24.5°C and a low of 22.6°C, with about 86.9 mm of rain over roughly 5 rainy days.
- What is the air quality in Skiathos in September?
- Skiathos has a mean US Air Quality Index of about 48 in September.
Other months in Skiathos
Compare Skiathos in September
Warmer or cooler than Skiathos in September
Similar destinations in Southern Europe — September
Within 300 km: Zakynthos' Loggerhead nesting in Laganas Bay on 1 May – 31 Oct, and Naxos' Naxos Festival, Bazeos Tower around 1 Jul – 15 Sep.