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Sea Temperature in Katwijk in September
© Wim Roos
Complete information on the sea temperature range in the North Sea in Katwijk in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Katwijk. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Katwijk in September
16°C
MINIMUN
18.5°C
AVERAGE
21°C
MAXIMUM
Historical Data of Water Temperature in September in Katwijk
Water Temperature Chart for North Sea in Katwijk in September
Sea Temperature Table in Katwijk in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 19°C | 19°C | 18°C | 19.0°C |
| Sep 2 | 19°C | 20°C | 16°C | 18.5°C |
| Sep 3 | 18°C | 20°C | 17°C | 18.5°C |
| Sep 4 | 19°C | 19°C | 16°C | 18.3°C |
| Sep 5 | 18°C | 19°C | 18°C | 18.5°C |
| Sep 6 | 18°C | 19°C | 19°C | 19.0°C |
| Sep 7 | 18°C | 19°C | 16°C | 18.3°C |
| Sep 8 | 19°C | 19°C | 17°C | 18.8°C |
| Sep 9 | 20°C | 19°C | 18°C | 19.5°C |
| Sep 10 | 19°C | 19°C | 16°C | 18.5°C |
| Sep 11 | 17°C | 19°C | 17°C | 18.3°C |
| Sep 12 | 17°C | 18°C | 16°C | 17.5°C |
| Sep 13 | 17°C | 18°C | 18°C | 18.0°C |
| Sep 14 | 18°C | 19°C | 20°C | 19.0°C |
| Sep 15 | 17°C | 19°C | 20°C | 18.5°C |
| Sep 16 | 17°C | 19°C | 19°C | 18.3°C |
| Sep 17 | 17°C | 19°C | 16°C | 17.5°C |
| Sep 18 | 19°C | 19°C | 18°C | 18.5°C |
| Sep 19 | 19°C | 19°C | 19°C | 18.5°C |
| Sep 20 | 19°C | 18°C | 19°C | 18.5°C |
| Sep 21 | 18°C | 18°C | 18°C | 18.0°C |
| Sep 22 | 18°C | 18°C | 17°C | 17.8°C |
| Sep 23 | 18°C | 18°C | 20°C | 18.5°C |
| Sep 24 | 18°C | 18°C | 19°C | 18.3°C |
| Sep 25 | 18°C | 18°C | 17°C | 17.8°C |
| Sep 26 | 18°C | 18°C | 18°C | 18.0°C |
| Sep 27 | 18°C | 17°C | 17°C | 17.5°C |
| Sep 28 | 18°C | 17°C | 17°C | 17.5°C |
| Sep 29 | 19°C | 17°C | 17°C | 17.8°C |
Katwijk Climate and Swimming Opportunities in September
19°C
Average Day Air Temperature
11°C
Average Night Air Temperature
87 mm
Precipitation Amount per Month
13 days
Number of Rainy Days
13 hrs
Daylight
per Day
5 hrs
Sunshine
per Day
19 km/h
Average Wind Speed
82%
Average
humidity
Katwijk lies within the South Holland in Netherlands. The average daytime temperature in Katwijk in September is 19°C (65°F), while the nighttime average is 11°C (52°F). There are typically 13 rainy days during the month, with a total precipitation of 87 mm (3.4 inches). The daylight duration in September in Katwijk is 13 hours, with an average of 5 hours of sunshine per day. The average wind speed in September is 19 km/h (12 mph), and the humidity level is around 82%.
The water temperature in Katwijk in September ranges from 17°C to 19°C (63°F to 66°F). At the beginning of the month, the average temperature is around 19°C (66°F), shifting to 18°C (64°F) by mid-September and reaching 18°C (64°F) in the last ten days. Overall, the average sea temperature in Katwijk for September is 18°C (64°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Katwijk
What is the sea temperature in Katwijk in September?
The water temperature in the North Sea in Katwijk in September ranges from 17°C to 19°C (63°F to 66°F).
Is it possible to swim in the North Sea in Katwijk in September?
The average sea temperature in Katwijk in September is 18°C (64°F), and the air temperature is 19°C (65°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.