Measurements:
°C
°F
CURRENT WEATHER
22:29
Rotterdam
60°F
SE 9 mph
Feels like: 58°F
Precip: 24%
World Resorts Netherlands Rotterdam Weather

7 Day Weather Forecast

09.08
tue
DAY
64°F
E 9 mph
precip
23%
NIGHT
56°F
E 7 mph
precip
29%
09.09
wed
DAY
62°F
E 10 mph
precip
30%
NIGHT
56°F
SE 2 mph
precip
8%
09.10
thu
DAY
68°F
NE 7 mph
precip
15%
NIGHT
58°F
N 5 mph
precip
23%
09.11
fri
DAY
70°F
NE 11 mph
precip
27%
NIGHT
60°F
SW 4 mph
precip
24%
09.12
sat
DAY
70°F
N 5 mph
precip
15%
NIGHT
64°F
NE 9 mph
precip
20%
09.13
sun
DAY
66°F
E 8 mph
precip
32%
NIGHT
60°F
SW 3 mph
precip
20%
09.14
mon
DAY
70°F
N 5 mph
precip
7%
NIGHT
64°F
N 3 mph
precip
8%

Rotterdam Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Rotterdam was 18.1°F. The maximum and minimum values were 15.9°F and 19.6°F respectively.

Rotterdam on the Weather Map

Best Time to Visit Rotterdam
The most sunny months:
August 12 days
June 11 days
April 11 days
The most warm months:
August 74.2 °F
July 73.6 °F
June 70.6 °F
Warmest sea temperature:
August 69.1 °F
July 67.2 °F
September 66.4 °F
The most cold months:
January 42.0 °F
February 43.9 °F
December 45.3 °F
The most rainy months:
August 4 days
December 4 days
October 4 days
The most windy months:
December 12 mph
February 12 mph
January 12 mph
more details