canIswim

What wetsuit do you need in North Korea?

The one suit that covers most of the swimming season, for 15 coastal cities in North Korea.

City Coldest Warmest One suit for the season
Hŭngnam 3.9°C Feb 25.6°C Aug nothing
Wŏnsan 2.7°C Feb 26.3°C Aug nothing
Chongjin 3.1°C Feb 23.9°C Aug nothing, or a rash vest
Haeju 2.9°C Feb 26.3°C Aug nothing
Ch’ŏngdan-ŭp 2.8°C Feb 26.5°C Aug nothing
Kwail-ŭp 4.1°C Feb 23.2°C Aug nothing, or a rash vest
Hongwŏn 3.9°C Feb 25.6°C Aug nothing
Hwadae 4.9°C Feb 23.4°C Aug nothing, or a rash vest
Rajin 2.0°C Feb 23.6°C Aug nothing, or a rash vest
Ongjin 4.8°C Feb 24.8°C Aug nothing
Changyŏn 4.1°C Feb 23.2°C Aug nothing, or a rash vest
Iwŏn-ŭp 4.8°C Feb 24.1°C Aug nothing
Sindo -0.7°C Feb 25.5°C Aug nothing
Sŭngam-nodongjagu 3.7°C Feb 23.9°C Aug nothing, or a rash vest
Yŏmju -0.6°C Feb 25.6°C Aug nothing

Thicknesses above are for swimming. Surfing the same water wants a step more — most of a session is spent sitting still in the wind rather than moving and immersed. Each city page gives both, along with when you need boots, gloves and a hood.

Boots below 14°C, gloves below 12°C, a hood below 10°C. Where the numbers come from