18.05
mon
mon
Day
84°F
NE 6 mph
Precip.
0%
0%
Night
72°F
NE 2 mph
Precip.
0%
0%
19.05
tue
tue
Day
79°F
SE 3 mph
Precip.
0%
0%
Night
70°F
W 4 mph
Precip.
0%
0%
20.05
wed
wed
Day
77°F
W 9 mph
Precip.
0%
0%
Night
66°F
S 2 mph
Precip.
100%
100%
21.05
thu
thu
Day
77°F
W 11 mph
Precip.
0%
0%
Night
66°F
SW 5 mph
Precip.
0%
0%
22.05
fri
fri
Day
81°F
NW 9 mph
Precip.
0%
0%
Night
70°F
N 4 mph
Precip.
0%
0%
23.05
sat
sat
Day
75°F
N 4 mph
Precip.
0%
0%
Night
68°F
E 1 mph
Precip.
0%
0%
24.05
sun
sun
Day
82°F
E 5 mph
Precip.
0%
0%
Night
73°F
NE 2 mph
Precip.
0%
0%
25.05
mon
mon
Day
86°F
E 1 mph
Precip.
0%
0%
Night
77°F
E 4 mph
Precip.
0%
0%
26.05
tue
tue
Day
82°F
NW 11 mph
Precip.
0%
0%
Night
66°F
SW 1 mph
Precip.
100%
100%
27.05
wed
wed
Day
61°F
S 5 mph
Precip.
100%
100%
Night
61°F
N 3 mph
Precip.
89%
89%
28.05
thu
thu
Day
75°F
E 11 mph
Precip.
0%
0%
Night
66°F
N 4 mph
Precip.
0%
0%
29.05
fri
fri
Day
82°F
S 1 mph
Precip.
0%
0%
Night
73°F
SW 2 mph
Precip.
0%
0%
30.05
sat
sat
Day
88°F
W 2 mph
Precip.
0%
0%
Night
79°F
E 3 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 59.0°F. The highest and lowest sea temperatures during the month were 62.1°F and 57.6°F.
Air temperature in Seoul, °F
Precipitation total in Seoul, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Seoul
Seoul on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Seoul
Local time: 02:32
May 18, monday
0300
64°F
W
2 mph
2 mph
0600
64°F
W
2 mph
2 mph
0900
75°F
NW
2 mph
2 mph
1200
84°F
NE
6 mph
6 mph
1500
84°F
E
9 mph
9 mph
1800
79°F
E
8 mph
8 mph
2100
73°F
E
2 mph
2 mph
May 19, tuesday
0000
72°F
NE
2 mph
2 mph
