16.09
wed
wed
Day
64°F
E 12 mph
Precip.
9%
9%
Night
55°F
NE 6 mph
Precip.
9%
9%
17.09
thu
thu
Day
63°F
NE 14 mph
Precip.
16%
16%
Night
57°F
NE 11 mph
Precip.
29%
29%
18.09
fri
fri
Day
63°F
E 9 mph
Precip.
2%
2%
Night
55°F
NE 7 mph
Precip.
22%
22%
19.09
sat
sat
Day
61°F
NE 13 mph
Precip.
21%
21%
Night
63°F
NE 11 mph
Precip.
22%
22%
20.09
sun
sun
Day
68°F
SE 9 mph
Precip.
16%
16%
Night
57°F
SE 2 mph
Precip.
20%
20%
21.09
mon
mon
Day
66°F
E 7 mph
Precip.
5%
5%
Night
59°F
SE 5 mph
Precip.
16%
16%
22.09
tue
tue
Day
63°F
SW 9 mph
Precip.
20%
20%
Night
57°F
SW 7 mph
Precip.
11%
11%
23.09
wed
wed
Day
66°F
W 9 mph
Precip.
2%
2%
Night
61°F
NW 7 mph
Precip.
3%
3%
24.09
thu
thu
Day
70°F
NE 6 mph
Precip.
9%
9%
Night
59°F
NE 6 mph
Precip.
19%
19%
25.09
fri
fri
Day
63°F
S 9 mph
Precip.
14%
14%
Night
54°F
SW 6 mph
Precip.
23%
23%
26.09
sat
sat
Day
63°F
SW 7 mph
Precip.
13%
13%
Night
59°F
W 6 mph
Precip.
9%
9%
27.09
sun
sun
Day
68°F
W 5 mph
Precip.
1%
1%
Night
63°F
E 2 mph
Precip.
3%
3%
28.09
mon
mon
Day
64°F
E 11 mph
Precip.
13%
13%
Night
57°F
E 7 mph
Precip.
20%
20%
29.09
tue
tue
Day
61°F
NE 19 mph
Precip.
32%
32%
Night
55°F
SE 17 mph
Precip.
61%
61%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 67.4°F. The highest and lowest sea temperatures during the month were 68.9°F and 65.8°F.
Air temperature in Brussel, °F
Precipitation total in Brussel, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Brussel
Brussel on a weather map
Places in Belgium:
Name
°F
24 Hours Forecast
Brussel
Local time: 07:26
September 16, wednesday
0900
57°F
E
9 mph
9 mph
1200
64°F
E
12 mph
12 mph
1500
66°F
SE
14 mph
14 mph
1800
63°F
SE
12 mph
12 mph
2100
57°F
SE
5 mph
5 mph
September 17, thursday
0000
55°F
NE
6 mph
6 mph
0300
52°F
NE
7 mph
7 mph
0600
52°F
NE
11 mph
11 mph
