RIVER GAUGE · ST. MARYS RIVER
St. Marys River at Moniac
Charlton County, Georgia
Water level4.58 ft
Flow3 cfs
Last readingSep 16, 2026, 4:45 PM UTC (last recorded)
Action10 ft
Minor flood12 ft
Moderate flood15 ft
Major flood17 ft
The past week
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What floods at each level
- 17 ft
Trailers and houses on both sides of the river become endangered.
- 15 ft
Flooding begins to impact Mocassin Creek Circle on Florida side with some portions of the road becoming cut-off. Access roads on both sides of the river in Florida and Georgia begin to flood.
- 14 ft
Bethea State Forest campground sites completely flooded on Florida side and water begins to enter campground parking lot.
- 12 ft
Bethea State Forest campground sites begin to flood on the Florida side just north of the gage.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Apr 4, 1973 | 22.98 ft | 11,600 cfs |
| Sep 18, 1928 | 19.9 ft | 6,060 cfs |
| Aug 23, 2008 | 19.15 ft | 5,740 cfs |
More on St. Marys River
DownstreamSt. Marys River near Macclenny
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