25.09
fri
fri
Day
97°F
W 7 mph
Precip.
1%
1%
Night
77°F
NW 2 mph
Precip.
42%
42%
26.09
sat
sat
Day
97°F
W 5 mph
Precip.
4%
4%
Night
73°F
NE 2 mph
Precip.
35%
35%
27.09
sun
sun
Day
95°F
W 6 mph
Precip.
2%
2%
Night
75°F
W 1 mph
Precip.
43%
43%
28.09
mon
mon
Day
97°F
W 7 mph
Precip.
3%
3%
Night
77°F
W 1 mph
Precip.
42%
42%
29.09
tue
tue
Day
93°F
W 10 mph
Precip.
8%
8%
Night
75°F
NW 2 mph
Precip.
43%
43%
30.09
wed
wed
Day
93°F
W 12 mph
Precip.
2%
2%
Night
77°F
W 2 mph
Precip.
40%
40%
01.10
thu
thu
Day
93°F
W 11 mph
Precip.
6%
6%
Night
77°F
W 1 mph
Precip.
42%
42%
sea water
temperature
temperature
| Willemstad |
monthly
weather
weather
| Willemstad |
current
weather
weather
| Willemstad |
14 days
forecast
forecast
| Willemstad |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 83.4°F. The highest and lowest sea temperatures during the month were 83.7°F and 82.8°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 85.4°F. The highest and lowest sea temperatures during the month were 86.2°F and 84.2°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: 18:43
September 25, friday
2100
77°F
W
3 mph
3 mph
September 26, saturday
0000
77°F
NW
2 mph
2 mph
0300
75°F
N
2 mph
2 mph
0600
75°F
N
2 mph
2 mph
0900
81°F
NW
5 mph
5 mph
1200
97°F
W
5 mph
5 mph
1500
91°F
SW
11 mph
11 mph
1800
82°F
W
7 mph
7 mph
