Cooper River at HW-17, SC
River level and flood forecast · Charleston County
Normal0.6 ftas of Mon 4:15 PM
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
What floods at each level
From the National Weather Service, highest first.
- 9.69 ftRecord tide level reached in association with Tropical Storm Irma on September 11th, 2017.
Highest crests on record
- 9.692 ft — September 11, 2017
- 9.52 ft — December 17, 2023
- 9.25 ft — August 30, 2023
- 9.232 ft — October 8, 2016
- 8.752 ft — November 24, 2018
Recent crests: 8.49 ft (October 10, 2025) · 8.34 ft (November 16, 2024) · 9.52 ft (December 17, 2023) · 9.25 ft (August 30, 2023) · 8.36 ft (June 4, 2023)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CPCS1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.