Swimming in Rotterdam in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Rotterdam in september 2025.
In september, according to seasonal norms, the sea temperature in Rotterdam is:
Minimum: 63°F
Average: 65°F
Maximum: 68°F
Other useful seasonal weather averages in september:
- Outside temperature: 60°F to 65°F
- Most common weather: "Clear/Sunny"
- The wind blows at 9.3mph
- It rains a total of 3.7in, over 7 day(s).
Should we swim in Rotterdam in september?
Yes... and no. The water temperature in Rotterdam in september is cool
Swimming in september on the beaches of Rotterdam is possible but the sea water is cool. So even though the sea temperature sometimes climbs to 68°F, it can also be as low as 63°F! Note that the average is 65°F.
Note also that in september, the climate is good with an average outside temperature of 62°F, 3.7in of precipitation (over 7 days) and 81.57 % humidity.
Water and normal seasonal temperatures in Rotterdam in september
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 61°F | ||
| Wind speed | 15.5mph | ||
| Wind temperature | 59°F | ||
| Precipitation | 3.7in | ||
| Number of days of rain | 7 jour(s) (23%) | ||
| Humidity | 82% | ||
| Visibility in kilometers | 9.56km | ||
| Cloud cover | 43% | ||
| Our opinion | cool swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Rotterdam
Swim elsewhere in the Netherlands in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Amsterdam in september | 65°F | 68°F | cool swimming | Den Haag in september | 65°F | 68°F | cool swimming | Volendam in september | 65°F | 68°F | cool swimming | Zandvoort in september | 65°F | 68°F | cool swimming | Marken in september | 65°F | 68°F | cool swimming |
Swim in the Netherlands in september: sea temperature by city