Rio Grande De Manati near Manati, PR
River level and flood forecast · Manati County
The river is 5.3 ft below flood stage (16 ft).
Flow: 100 cubic feet per second (USGS).
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.
Get flood alerts for this river
An email when the National Weather Service forecasts Rio Grande De Manati near Manati to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 35 ft |
| Moderate flood stage | 25 ft |
| Flood stage | 16 ft |
| Action stage | 12 ft |
| Record crest (August 14, 2024) | 37.16 ft |
What floods at each level
From the National Weather Service, highest first.
- 35 ftPR-2 impassable from La Vuelta Nutrition Club to Paso Real.-erg 09/24
- 31 ftFlood water reaches houses in Sector California, near PR-2. -erg 09/2024
- 25 ftWidespread flooding at PR-2. The road becomes totally impassable.-erg 05/2025
- 23 ftSeveral lanes of PR-2 will become impassable. -erg 05/2025
- 16 ftRio Grande de Manati likely to be overflowed over PR-2, km 51 to 52 from Barceloneta eastward to Manati/ erg 05/2025
Highest crests on record
- 37.16 ft — August 14, 2024
- 35.97 ft — May 7, 2024
- 31.04 ft — November 6, 2022
- 25.06 ft — May 6, 2024
- 23.69 ft — May 5, 2025
Recent crests: 17.35 ft (March 29, 2026) · 16.72 ft (October 10, 2025) · 22.7 ft (September 10, 2025) · 17.29 ft (May 18, 2025) · 18.6 ft (May 7, 2025)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (RGMP4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.