14.09
mon
mon
Day
77°F
SW 7 mph
Precip.
57%
57%
Night
73°F
SW 5 mph
Precip.
62%
62%
15.09
tue
tue
Day
73°F
SW 4 mph
Precip.
68%
68%
Night
73°F
SW 3 mph
Precip.
57%
57%
16.09
wed
wed
Day
75°F
S 3 mph
Precip.
56%
56%
Night
73°F
S 4 mph
Precip.
45%
45%
17.09
thu
thu
Day
82°F
W 7 mph
Precip.
67%
67%
Night
75°F
SW 4 mph
Precip.
62%
62%
18.09
fri
fri
Day
81°F
W 7 mph
Precip.
22%
22%
Night
75°F
SW 5 mph
Precip.
27%
27%
19.09
sat
sat
Day
86°F
W 9 mph
Precip.
47%
47%
Night
77°F
SW 4 mph
Precip.
16%
16%
20.09
sun
sun
Day
90°F
W 7 mph
Precip.
3%
3%
Night
77°F
S 2 mph
Precip.
10%
10%
21.09
mon
mon
Day
88°F
NW 6 mph
Precip.
3%
3%
Night
77°F
SW 2 mph
Precip.
13%
13%
22.09
tue
tue
Day
88°F
NW 6 mph
Precip.
12%
12%
Night
77°F
SW 2 mph
Precip.
27%
27%
23.09
wed
wed
Day
84°F
W 6 mph
Precip.
55%
55%
Night
77°F
SW 4 mph
Precip.
30%
30%
24.09
thu
thu
Day
86°F
W 9 mph
Precip.
5%
5%
Night
75°F
SW 3 mph
Precip.
21%
21%
25.09
fri
fri
Day
86°F
W 8 mph
Precip.
18%
18%
Night
75°F
SW 3 mph
Precip.
15%
15%
26.09
sat
sat
Day
86°F
NW 8 mph
Precip.
5%
5%
Night
75°F
SW 3 mph
Precip.
31%
31%
27.09
sun
sun
Day
86°F
NW 7 mph
Precip.
7%
7%
Night
77°F
W 3 mph
Precip.
18%
18%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 85.6°F. The highest and lowest sea temperatures during the month were 87.4°F and 84.0°F.
Air temperature in Ha Long, °F
Precipitation total in Ha Long, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Ha Long
Ha Long on a weather map
Places in Vietnam:
Name
°F
24 Hours Forecast
Ha Long
Local time: 21:16
September 15, tuesday
0000
73°F
SW
5 mph
5 mph
0300
73°F
SW
3 mph
3 mph
0600
72°F
SW
4 mph
4 mph
0900
73°F
W
4 mph
4 mph
1200
73°F
SW
4 mph
4 mph
1500
73°F
SW
3 mph
3 mph
1800
73°F
SW
3 mph
3 mph
2100
73°F
SW
3 mph
3 mph
