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Sylt in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Sylt in September is climatically mixed. The average daily high is around 17 °C, and the sea is about 16 °C. With about 15 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
42/100 · #4
Warmth
#3
Dryness
#7
Sun
#6
Sea warmth
#3
Published best categories: City break, Active
Sylt · SeptemberPhoto: Sebastian Martin Dicke · CC BY-SA 4.0Climate facts
- Average high
- 17 °C
- Average low
- 15 °C
- Sea
- 16 °C
- Rainy days (est.)
- 15 rainy days (est.)
- Sun (est.)
- 4 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 19 | 17 | 16 | 85 | 5.3 | 82 | 5.3 | 19 | 53 |
| September (selected) | 17 | 15 | 15 | 84 | 3.6 | 82 | 6.0 | 16 | 42 |
| October | 13 | 11 | 17 | 99 | 1.9 | 84 | 6.7 | 13 | 24 |
How do the previous and next months compare?
Baseline: September (42/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | +11 | +2.2 °C | +2 °C | +0.9 | +0.5 mm | +1.7 h | -0.2 % | -0.6 m/s | +2.2 °C |
| October | -18 | -3.7 °C | -3.6 °C | +2.6 | +15.4 mm | -1.7 h | +1.4 % | +0.7 m/s | -3.7 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Sylt in September?
The average daily high is around 17 °C, with an average daily low of about 15 °C.
Can you swim in Sylt in September?
The sea is about 16 °C (cold).
Does it rain a lot in Sylt in September?
The curated estimate is about 15 rainy days per month, not a directly measured long-term average. Total precipitation averages around 84 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Sylt?
No month in Sylt reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.