JEJU · LOCAL DIFFERENCES
Jeju north vs south weather
Jeju is not one uniform weather point. Mountain terrain, wind and your side of the island can make Jeju City and Seogwipo feel different on the same trip.Have travel dates already?Check recent observed weather patterns and confirmed official events for Seoul, Busan or Jeju.
Check my travel dates →Which locations are compared?
OnulDogu separates a representative northern observation around Jeju City from a southern observation around Seogwipo. These points are travel references, not a promise of conditions at every beach, trail or mountain road.
Why Hallasan changes the experience
Jeju's central mountain terrain affects cloud, wind and rainfall patterns. A clear coast does not guarantee the same conditions on Hallasan, and conditions can change quickly with elevation.
How to pack for both sides
Bring a light wind-resistant layer, sun protection and a compact rain option even when the island-wide summary looks mild. For hiking, use the official mountain weather and trail notices rather than the coastal city result.