Charleston sees about 1,300 mm (roughly 52 inches) of rain a year and sits directly on the Atlantic coast, making it a regular target for tropical storms and hurricanes moving up from the Caribbean or forming off the Southeast coast. The historic peninsula’s low elevation means even routine heavy rain combined with high tide can produce “sunny day” flooding, and that sensitivity only increases when a tropical system is nearby. Late summer and early fall are the highest-risk months, when warm ocean water fuels storm intensification close to shore. Because Charleston’s flooding risk comes from the combination of rainfall, storm surge, and tidal timing, radar alone doesn’t tell the whole story, but it remains the fastest way to see a storm band or tropical system approaching before official warnings catch up. The area is covered by the National Weather Service’s regional Doppler radar network.
Learn more: Hurricane Season Radar Guide · Open the full Rain Map
Frequently Asked Questions
Is it raining in Charleston right now?
The live radar map above shows precipitation over Charleston, South Carolina in real time. Blue shades indicate light rain, while yellow, orange, and red mark heavier downpours. If no colored echoes appear over Charleston, no significant rain is currently being detected.
How often does the Charleston 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 Charleston?
Yes. Press play on the radar to animate the last few hours of rainfall and watch which way rain cells over South Carolina are moving – the clearest way to judge whether a shower will reach Charleston or pass by.
Is this Charleston 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.