Mermentau River At Mermentau, LA
Is Mermentau River At Mermentau, LA flooding right now?
Mermentau River At Mermentau, LA measured 2.02 ft on 2026-09-22 23:15:00 UTC. That observation was 2.0 ft below its 4 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
2.02 ft
Streamflow
208 cfs
Minor flooding here begins at 4 ft, with major flooding at 8 ft. The highest crest on record was 14.5 ft on Wed, Aug 7, 1940.
Flood forecast
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 4 ft | 2.0 ft below |
| Minor flood | 4 ft | 2.0 ft below |
| Moderate flood | 6 ft | 4.0 ft below |
| Major flood | 8 ft | 6.0 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 14.5 ft | 1940-08-07 |
| 10.68 ft | 2016-08-18 |
| 10.56 ft | 2013-01-15 |
| 9.47 ft | 1972-12-10 |
| 9.05 ft | 1977-04-25 |
Last 7 days
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Bayou Plaquemine Brule @ Esterwood, LA. | 7.6 mi | Acadia Parish |
| Byu Queue De Tortue @ Riceville, LA | 9.0 mi | Acadia Parish |
| Mermentau River @ Lake Arthur, LA | 9.1 mi | Jefferson Davis Parish |
| Bayou Des Cannes west of Iota, LA | 10.3 mi | Acadia Parish |
| Byu Plaquemine Brule near Crowley, LA | 12.0 mi | Acadia Parish |
Get a flood alert for this gauge
Free email alerts when this gauge approaches flood stage are coming soon. Leave your email and you'll be first in line.
One email when alerts launch, then only flood notifications. No spam, unsubscribe anytime.
Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.