Busan, South Korea · Records from 2006 to 2025. Not a forecast.
Mean high22°Hottest day 30.1° (2022)
Mean low15°Coldest night 6.2° (2010)
Rain days7 days4-10 by year
Rainfall154mmDaylight 13.6 → 14.4 h
Busan's 12 months iBest: May, June and October
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Trip typesBeach Poorcool seaSightseeing on foot Goodmild
Humidity66%0 muggy days
Clear days7 days10 overcast days
Mean wind11 km/hRarely windy
Sea temperature17.1°15.9-17.9° by year (last 6)
Sunrise / sunset (15th)05:20 / 19:20Daylight 13.6 → 14.4 h
Busan in May
More days are warm enough for short sleeves, though rain still turns up regularly before the rainy season. The Haeundae Sand Festival is usually held in May, filling the beach with large sand sculptures. The beaches have not officially opened yet and there are no lifeguards, so keep it to paddling.
Busan saw 22°C by day and 15°C at night in May. A light layer covered most days. With about 7 rain days, showers were an occasional nuisance rather than the rule. Years were fairly alike: the driest had 4 rain days and the wettest 10.
Wet days did not mess around: about 22 mm each, the kind of rain that drives you into a doorway.
How long it rained
On a rainy day it rained for about 6.3 hours. Rain came at any time of day.
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Typhoonsi No tropical storm passed within 300 km in this month over the last 20 years. Typhoons: July to October
Over the past 20 years May averaged 7 rain days (1 mm or more) out of 31. Individual years ran from 4 in the driest to 10 in the wettest.
What should I wear in Busan in May?
Days averaged 22°C and nights 15°C. Pack a compact umbrella, a light layer for the evenings, and T-shirts.
Can you swim in Busan in May?
Sea surface temperature averaged 17.1°C in May, too cold for most people without a wetsuit. Year to year it ranged 15.9-17.9°C. Check local flags for waves and jellyfish on the day.
Is May a good time to visit Busan?
On warmth and rain days alone, Busan's easiest months were May, June and October. May ranked 3 of 12, close to the top.
How many clear days does Busan get in May?
About 7 clear days (under 30% cloud on average) and 10 overcast days (80% or more).