17.05
sun
sun
Day
86°F
W 11 mph
Precip.
67%
67%
Night
79°F
W 4 mph
Precip.
100%
100%
18.05
mon
mon
Day
81°F
N 7 mph
Precip.
100%
100%
Night
77°F
W 5 mph
Precip.
77%
77%
19.05
tue
tue
Day
79°F
NW 7 mph
Precip.
100%
100%
Night
79°F
W 4 mph
Precip.
64%
64%
20.05
wed
wed
Day
79°F
NW 5 mph
Precip.
100%
100%
Night
77°F
W 4 mph
Precip.
100%
100%
21.05
thu
thu
Day
77°F
NW 9 mph
Precip.
100%
100%
Night
79°F
NW 6 mph
Precip.
100%
100%
22.05
fri
fri
Day
84°F
N 8 mph
Precip.
100%
100%
Night
79°F
N 6 mph
Precip.
100%
100%
23.05
sat
sat
Day
86°F
N 9 mph
Precip.
70%
70%
Night
81°F
NW 4 mph
Precip.
0%
0%
24.05
sun
sun
Day
88°F
N 9 mph
Precip.
0%
0%
Night
81°F
N 7 mph
Precip.
0%
0%
25.05
mon
mon
Day
90°F
N 11 mph
Precip.
0%
0%
Night
82°F
N 7 mph
Precip.
0%
0%
26.05
tue
tue
Day
90°F
N 9 mph
Precip.
0%
0%
Night
82°F
W 3 mph
Precip.
0%
0%
27.05
wed
wed
Day
91°F
N 6 mph
Precip.
0%
0%
Night
79°F
SW 4 mph
Precip.
100%
100%
28.05
thu
thu
Day
84°F
W 5 mph
Precip.
100%
100%
Night
77°F
SW 3 mph
Precip.
100%
100%
29.05
fri
fri
Day
82°F
W 6 mph
Precip.
100%
100%
Night
79°F
SW 5 mph
Precip.
0%
0%
30.05
sat
sat
Day
86°F
W 8 mph
Precip.
24%
24%
Night
81°F
W 6 mph
Precip.
0%
0%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 81.6°F. The highest and lowest sea temperatures during the month were 84.7°F and 80.4°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: 04:30
May 17, sunday
0600
79°F
SW
6 mph
6 mph
0900
84°F
W
9 mph
9 mph
1200
86°F
W
11 mph
11 mph
1500
86°F
W
10 mph
10 mph
1800
82°F
W
7 mph
7 mph
2100
79°F
W
6 mph
6 mph
May 18, monday
0000
79°F
W
4 mph
4 mph
0300
79°F
W
3 mph
3 mph
