05.09
sat
sat
Day
97°F
NW 11 mph
Precip.
9%
9%
Night
79°F
W 4 mph
Precip.
22%
22%
06.09
sun
sun
Day
100°F
NW 14 mph
Precip.
9%
9%
Night
77°F
W 4 mph
Precip.
30%
30%
07.09
mon
mon
Day
99°F
W 12 mph
Precip.
7%
7%
Night
75°F
W 4 mph
Precip.
62%
62%
08.09
tue
tue
Day
95°F
W 15 mph
Precip.
10%
10%
Night
75°F
W 3 mph
Precip.
45%
45%
09.09
wed
wed
Day
93°F
W 11 mph
Precip.
5%
5%
Night
75°F
NW 5 mph
Precip.
40%
40%
10.09
thu
thu
Day
93°F
W 10 mph
Precip.
6%
6%
Night
75°F
W 2 mph
Precip.
27%
27%
11.09
fri
fri
Day
90°F
W 8 mph
Precip.
11%
11%
Night
75°F
W 3 mph
Precip.
51%
51%
12.09
sat
sat
Day
91°F
W 9 mph
Precip.
8%
8%
Night
77°F
W 5 mph
Precip.
50%
50%
13.09
sun
sun
Day
91°F
NW 11 mph
Precip.
21%
21%
Night
77°F
W 5 mph
Precip.
32%
32%
14.09
mon
mon
Day
93°F
W 10 mph
Precip.
8%
8%
Night
77°F
W 4 mph
Precip.
38%
38%
15.09
tue
tue
Day
93°F
NW 9 mph
Precip.
9%
9%
Night
77°F
W 7 mph
Precip.
20%
20%
16.09
wed
wed
Day
95°F
N 7 mph
Precip.
1%
1%
Night
77°F
W 4 mph
Precip.
13%
13%
17.09
thu
thu
Day
90°F
NW 6 mph
Precip.
5%
5%
Night
79°F
NW 4 mph
Precip.
8%
8%
18.09
fri
fri
Day
97°F
N 10 mph
Precip.
1%
1%
Night
84°F
W 9 mph
Precip.
3%
3%
sea water
temperature
temperature
| Willemstad |
monthly
weather
weather
| Willemstad |
current
weather
weather
| Willemstad |
7 days
forecast
forecast
| Willemstad |
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 84.6°F. The highest and lowest sea temperatures during the month were 85.6°F and 83.7°F.
Air temperature in Willemstad, °F
Precipitation total in Willemstad, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Willemstad
Willemstad on a weather map
24 Hours Forecast
Willemstad
Local time: 03:35
September 05, saturday
0600
73°F
NW
2 mph
2 mph
0900
82°F
NW
8 mph
8 mph
1200
97°F
NW
11 mph
11 mph
1500
97°F
SW
14 mph
14 mph
1800
86°F
W
14 mph
14 mph
2100
79°F
W
9 mph
9 mph
September 06, sunday
0000
79°F
W
4 mph
4 mph
0300
77°F
NW
2 mph
2 mph
