St. George Tides (MLLW)
Maine — Water Level & Flood Stage
Located in Knox County, Maine. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
Loading...
Streamflow
Loading...
Last Reading
Loading...
This is an NWS forecast point (LID: STGM1). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
14.5 ft
Moderate Flood
13.5 ft
Minor Flood
12.5 ft
Action Stage
11.5 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
16 ft
Route 131 in Martinsville flooded with up to a foot of water. Low-lying coastal properties inundated near Birth Inn Road.
14.5 ft
Port Clyde waterfront becomes flooded with greater than 1 to 2 feet of inundation impacting some local businesses. Numerous roads approaching Port Clyde become flooded, including Factory Road, Route 131, Horse Point Road, and Drift Inn Road. Water levels are similar to the January 13, 2024 stormtide.
13.5 ft
Port Clyde waterfront becomes flooded with up to 1 foot of inundation impacting some local businesses on the northern end of the waterfront. Cold Storage Road becomes flooded. Water approaches Factory Road in Water approaches Factory Road in Port Clyde and Route 131 bridge in Martinsville with splash-over.
12.5 ft
Minor wharf flooding along Port Clyde waterfront with flooded piers and parking lots.
Impact statements from the National Weather Service, describing what typically happens at each water level.
Low-Water Impacts
5 ft
Stage needed to inundate designated Gulf Sturgeon critical habitat below Jim Woodruff Lock and Dam.
3 ft
Temporary (not sustainable) operating level for of Scholz Power Plant
What happens as water levels drop, per the National Weather Service.
7-Day Water Level Chart
Loading chart data...
About This Gauge
NWS LID
STGM1
County
Knox, ME
Coordinates
43.9286°N, 69.2603°W
Get Flood Alerts for St. George Tides (MLLW)
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of St. George Tides (MLLW)?
The St. George Tides (MLLW) gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for St. George Tides (MLLW)?
The NWS-defined flood stage for St. George Tides (MLLW) is 12.5 feet. Action stage begins at 11.5 feet. Moderate flooding starts at 13.5 feet, and major flooding at 14.5 feet.
How do I get alerts when this river rises?
Download StormCast free on Google Play, go to River Gauges, and add St. George Tides (MLLW) to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the St. George Tides (MLLW) gauge located?
The gauge is located in Knox County, Maine at coordinates 43.9286°N, 69.2603°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: This link will lead you to the St. George/Port Clyde Tide Gage dashboard