SeasonMapSylt weather in September
Germany
September in Sylt: nice, rainy, with clean air — a great time to visit.
#5 of 12 months in Sylt · #911 of 1383 destinations to visit in September · comfort 72/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Sylt in September
Other months in Sylt
Sylt's forum calls August peak season but not a weather guarantee — regulars note it's an island climate first, so a light jacket is standard packing advice for breezy evenings even in high summer. It's also the wettest month, with showers likely on a good third of the days.
Add your own note from Sylt's card on the map.
Sylt climate normals — September
| Daytime high | 19°C / 66°F | 😎 nice |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 17°C / 63°F | |
| Sea temperature | 19°C / 66°F | 🧊 bracing |
| Rainfall | 94 mm / 3.7 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 8.9 h/day | |
| Daylight | 12.7 h | |
| Wind | 33 km/h / 21 mph | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Sylt 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.
BusyWindsurf World Cup, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Sylt'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 weatherSylt's weather peaks June–August.
Best weatherFair weatherToughest weather
What's on in Sylt in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Beach pass charge
1 Jan – 31 DecA spa fee is charged island-wide and a day pass is sold at the beach crossings; under-18s are exempt. Overnight guests pay it through the accommodation whether they use the beach or not. Source ↗
- Season
North Sea swimming season
1 Jul – 10 Sep · usuallySea warm enoughThe water reaches the high teens in late summer and no higher. It is a wind and walking coast rather than a swimming one, and the strand baskets exist for a reason.
- Nature
Heather in flower
10 Aug – 20 Sep · usuallyWildflowers & bloomsThe dune heath in the Braderuper Heide and along the eastern side goes purple from the middle of August for about a month, which is the island at its best on foot.
- Festival
Windsurf World Cup
25 Sep – 4 OctMajor festivalCrowdedThe tour finishes in front of Westerland at the end of September, when the autumn wind arrives. Ten days of competition and a promenade full of tents, free to watch from the beach. Source ↗
Nearby, and something's on
Within 300 km of Sylt — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Sylt?
Sylt in September — FAQ
- Is September a good time to visit Sylt?
- September in Sylt: nice, rainy, with clean air — a great time to visit. It ranks #5 of 12 months for Sylt on SeasonMap's comfort score (72/100).
- What is the weather like in Sylt in September?
- In September, Sylt averages a daily high of 18.7°C and a low of 14.1°C, with about 94.1 mm of rain over roughly 12.5 rainy days.
- What is the air quality in Sylt in September?
- Sylt has a mean US Air Quality Index of about 47 in September.
Other months in Sylt
Compare Sylt in September
Warmer or cooler than Sylt in September
Similar destinations in Central Europe — September
Within 300 km: Copenhagen's Tivoli summer season on 27 Mar – 20 Sep, and Hamburg's Alster and pool season around 15 May – 10 Sep.