World Resorts South Korea Jeju Weather

Jeju Sea Temperature in May

Average sea water temperature in May:
+62.0°F
Minimum sea water temperature in May: 69.3°F
Maximum sea water temperature in May: 57.6°F

Daily sea water temperature in May, °F

Show year:
2026
2025
2024

The average sea water temperature in May of 2026 was 64.6°F. The highest and lowest sea temperatures during the month were 69.3°F and 59.5°F.

Monthly sea water temperature in Jeju, °F

Which South Korea resorts have warmest sea in May?

Place name May 2026 May 2025
Jeju 64.6°F 60.9°F
Busan 62.1°F 59.4°F
Incheon 60.8°F 58.9°F
Seoul 60.7°F 58.7°F
Yongpyong 58.8°F 55.7°F

Best time for vacation in Jeju

Sunniest months:
May 15 days
October 14 days
April 14 days
Warmest months:
August 84.4 °F
July 82.1 °F
September 77.7 °F
Warmest sea temp:
August 81.3 °F
September 77.5 °F
July 76.7 °F
Coldest months:
January 44.8 °F
February 46.3 °F
December 48.6 °F
Rainiest months:
August 8 days
September 7 days
July 7 days
Windiest months:
January 14.4 mph
December 14.1 mph
February 13.9 mph

Jeju on a weather map

Current weather
13:33
Jeju
+75°F
SW 16 mph
Feels like: +77°F
Precip.: 5%
Places in South Korea:
Name
°F
Yongpyong
+70°F
Incheon
+82°F
Muju
+77°F
Busan
+77°F
Seoul
+82°F
Jeju
+75°F
24 Hours Forecast
Jeju
Local time: 13:33
September 16, wednesday
1500
75°F
SW
16 mph
1800
73°F
W
14 mph
2100
72°F
W
14 mph
September 17, thursday
0000
70°F
W
16 mph
0300
70°F
W
17 mph
0600
70°F
SW
17 mph
0900
72°F
SW
17 mph
1200
72°F
SW
19 mph
Units of measurement: °C / °F