The dominant safety concern at Fort Sumter and Fort Moultrie is severe weather, particularly the combination of thunderstorm winds and tornadoes that struck Charleston County 19 times in recent recorded periods, alongside 8 flash flood events. Visiting a coastal, water-access historical site means you have limited shelter options when fast-moving storms roll in off the water, and the ferry crossings to Fort Sumter become genuinely dangerous under those conditions.
Before boarding any ferry or walking the exposed fort grounds, check the National Weather Service hourly forecast specifically for Charleston Harbor — not just a general app. Pack a NOAA weather radio or enable Wireless Emergency Alerts on your phone so you receive real-time tornado and flash flood warnings. If skies darken quickly, move immediately to the ferry terminal building or the nearest masonry structure, and do not wait for a scheduled boat departure if a storm warning is active.
Top recorded hazards in Charleston County
County dataFrom NOAA Storm Events (2024). Counts of recorded incidents — not all occurred at this park.
- Thunderstorm Wind 10
- Tornado 9
- Flash Flood 8
- Hail 2
- Lightning 1
Gear keyed to this park's risks
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About Fort Sumter and Fort Moultrie National Historical Park
Two forts stand at the entrance of Charleston Harbor. Patriots inside a palmetto log fort, later named Fort Moultrie, defeated the Royal Navy in 1776. As Charleston blazed a path towards secession to preserve slavery, construction on a new fort, Fort Sumter, proceeded. The Confederacy fired on the US garrison of Fort Sumter on April 12, 1861 opening the Civil War, which redefined American freedom.
Weather
Mild winters. Hot and humid during the summer.