Rio Piedras at Quebrada Margarita, PR
River level and flood forecast · Guaynabo County
The river is 6.3 ft below flood stage (9 ft).
Flow: 2 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 Piedras at Quebrada Margarita to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 14 ft |
| Moderate flood stage | 13 ft |
| Flood stage | 9 ft |
| Action stage | 5 ft |
| Record crest (October 28, 2023) | 14.06 ft |
What floods at each level
From the National Weather Service, highest first.
- 7 ftQuebrada Margarita likely to be out of its banks near San Patricio IF, only IF, there is poor maintenance. Particularly at Ave Luis Vigoreaux near Toral gas station. Call EMs to verify situation. / OMS
Highest crests on record
- 14.06 ft — October 28, 2023
- 12.48 ft — May 3, 2025
- 12.26 ft — September 2, 2024
- 11.93 ft — September 20, 2017
- 11.87 ft — August 31, 2023
Recent crests: 10.6 ft (September 27, 2025) · 11.37 ft (September 22, 2025) · 10.37 ft (September 6, 2025) · 10.28 ft (August 23, 2025) · 9.61 ft (July 22, 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 (QMAP4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.