Check current forecasts during the rainy season
Jangma (장마) is Korea's summer rainy season, associated with a seasonal rain front. It often affects travel from around late June into July, but the dates, rainfall and affected regions vary each year. Heavy rain can also occur outside that period.
Use the Korea Meteorological Administration for current forecasts and alerts. A monthly rainfall average helps describe the climate; it does not tell you whether a particular day's route will be safe.
Follow typhoon information as the track changes
Typhoons can bring strong wind, heavy rain, high waves and disruption far from the storm's centre. Check the forecast for your actual destination and route, not only the point where the storm may make landfall.
Read both advisories and warnings. An advisory can already require a change of plans, and local closures may begin before the worst weather arrives. Follow the instructions for your area rather than trying to decide safety from one wind-speed number.
Confirm transport before leaving for the terminal
Ferries, flights and some land services can be suspended. Check the operator's current notice and booking messages before travelling to the terminal. Ask about rebooking, refunds and where to wait if a service is cancelled.
Build flexibility into island travel, especially when a ferry or domestic flight connects with an international departure. One spare day can reduce pressure, but a prolonged disruption may require a larger change to the itinerary.
Avoid places where water can rise quickly
Stay away from flooded roads, underpasses, river paths, streams and closed coastal areas. Do not walk or drive through floodwater. Respect barriers even if other people cross them, and follow any instruction to leave a basement or low-lying area.
If authorities order evacuation, use the stated route and destination. Call 119 if someone needs urgent rescue or medical assistance.
Choose an alternative only when the journey is safe
A museum, café or shopping centre can be an alternative during ordinary rain, but it may close during severe weather. Check the venue and transport conditions before setting out. Staying at your accommodation may be more appropriate when authorities advise avoiding travel.
“Korea's emergency alert texts on your phone” explains how to recognise and read local instructions.
