South Carolina lightning map
South Carolina is highly thunderstorm-active in summer, with daily afternoon convection fueled by humid Atlantic air and sea-breeze fronts.
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Detected from NOAA GOES-19 GLM satellite data. Aggregate count for South Carolina — your exact location and alerts live in the app.
About lightning in South Carolina
South Carolina draws moisture from both the Atlantic and the Gulf, fueling frequent summer afternoon thunderstorms from the Upstate to the Lowcountry, with tropical systems adding to the late-season count. The active window runs May through September. Sea breezes often trigger storms that strike from their leading edge. The live distance and trend to the nearest flash are a safer guide than a daily average.
- Thunderstorm days/yr
- 50
- US rank
- #11 of 50
- Peak season
- May–September
State thunderstorm-day normals are provisional (NOAA/NWS); per-city climate data is shown where a station normal is published.
Cities in South Carolina
Lightning safety in South Carolina
The safest call in South Carolinaisn’t how many storm days it averages a year — it’s how close the nearest strike is right now. Keep to the 30-30 rule: indoors within 30 seconds of thunder, back outside only 30 minutes after the last. StrikeCast shows that live distance and whether the storm is closing in, so you can move early.
StrikeCast app
Distance, trend & alerts — in your pocket.
GPS-precise distance to the nearest strike, live approaching/moving-away trend, and push alerts for every place that matters across South Carolina — home, work, the kids' school.
Your exact location stays on your device. Never shared. Never tracked.
Lightning guides
Frequently asked
How many thunderstorm days does South Carolina get?
South Carolina averages about 50 thunderstorm days a year, versus a US average near 25 — roughly 2× the national norm. Activity peaks May–September.
Where does South Carolina rank for lightning in the US?
By mean annual thunderstorm days, South Carolina ranks #11 of 50 states. Rankings use NOAA/NWS climate normals; the live distance and trend on this page come from NOAA GOES-19 satellite data.
When is thunderstorm season in South Carolina?
Lightning is most frequent May–September in South Carolina.
How does StrikeCast track lightning in South Carolina?
StrikeCast reads NOAA GOES-19 GLM (Geostationary Lightning Mapper) satellite data, updated continuously, to show how far away the nearest strike is and whether it is approaching or moving away. Save any place in South Carolina in the free app to get a push alert when lightning closes in.