Ansan sits in South Korea’s greater Seoul capital region along the Han River basin, where the summer monsoon front known as jangma brings weeks of sustained rain from late June through July, followed by a secondary risk from typhoon remnants reaching the peninsula in August and September.
On the Yellow Sea coast southwest of Seoul, the city’s industrial waterfront and reclaimed land both factor into its flood risk profile. Because the jangma front can stall for days over the same area, cumulative rainfall rather than any single storm is often the bigger flood driver, and radar is used alongside river-gauge data on the Han River system to track conditions in real time. The Korea Meteorological Administration operates the national weather radar network. Learn more: Flash Flood Warning Signs on Radar · Open the full Rain Map
Frequently Asked Questions
Is it raining in Ansan right now?
The live radar map above shows precipitation over Ansan, Gyeonggi-do in real time. Blue shades indicate light rain, while yellow, orange, and red mark heavier downpours. If no colored echoes appear over Ansan, no significant rain is currently being detected.
How often does the Ansan rain radar update?
The radar refreshes continuously, typically every few minutes, so the map reflects current conditions rather than an hours-old forecast. Press play to animate the most recent frames.
Can I see if a storm is heading toward Ansan?
Yes. Press play on the radar to animate the last few hours of rainfall and watch which way rain cells over Gyeonggi-do are moving – the clearest way to judge whether a shower will reach Ansan or pass by.
Is this Ansan rain radar free to use?
Yes, completely free – no account, app download, or sign-up required. It works in any browser on desktop and mobile.