Westerland, Sylt 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
Poor
Best time to visit: April – August
What is the weather like in Westerland, Sylt in September?
In September, Westerland, Sylt is mild: daytime highs average 17 °C, and nights cool down to about 14 °C. The sea averages 16.5 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 101 mm in total. It is often windy, with gusts of around 34 km/h. All in all, September is not an ideal month for a holiday in Westerland, Sylt.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 28 | 16 | 4 |
| Day | 19° | 17° | 13° |
| Night | 16° | 14° | 10° |
| Sea | 19° | 17° | 13° |
| Sun | 8 h | 6 h | 4 h |
| Rain days | 14 | 13 | 17 |
More details for September
- Daylight
- 12 h 50 min06:57 – 19:47
- UV index
- 3 · moderateclear sky, noon (estimate)
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 34 km/haverage daily peak
- Cloud cover
- 65 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Berlin
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 20 %35 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
- Windproof jacket
Westerland, Sylt in September: quick answers
Is Westerland, Sylt hot in September?
No. In September, Westerland, Sylt is mild: daytime highs average 17 °C and nights drop to about 14 °C.
Can you swim in Westerland, Sylt in September?
Only if you don't mind cold water: in September the sea averages just 16.5 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Westerland, Sylt in September?
Rain is frequent, with about 13 rainy days and 101 mm in total.
Westerland, Sylt month by month
The whole year in Westerland, SyltAll destinations: Germany
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)