Flow report

Puerto Rico streamflow

Live discharge, gauge height, water temperature, and percent-of-normal readings from every USGS streamgauge in Puerto Rico. Built for paddlers, anglers, water managers, and flood researchers.

USGS gauges
78
State percent normal
84%
Paddle runs
0
Updated
May 30
Open the Puerto Rico flow layer on the map Every USGS streamgauge filtered to Puerto Rico.
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May
30
2026
Flow briefing

Streamflow levels across Puerto Rico are currently 84% of normal, with the Rio Culebrinas At Margarita Damsite Nr Aguada reporting the highest discharge in the state at 1,640 cfs and a gauge stage of 9.70 ft.

Meanwhile, the Rio Grande De Loiza Blw Damsite Loiza is seeing a spike today — up 2198% since yesterday and currently running near peak.

Tap any gauge below for the full hydrograph, paired weather forecast, and historical context. Use the rivers panel to jump into Puerto Rico's named rivers.

Puerto Rico at a glance

State-wide streamflow overview

The Puerto Rico flow picture in four data points -- where the state sits versus historical norms, what's flowing hardest, and what's spiking fastest.

Percent of normal

84%

100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.

Highest discharge

Rio Culebrinas At Margarita Damsite Nr Aguada 1,640 cfs

Gauge stage 9.70 ft

Biggest 24h spike

Rio Grande De Loiza Blw Damsite Loiza +2198%

Now 347 cfs

Network coverage

Gauges + rivers tracked 78 + 0

USGS gauges feeding 0 named rivers in Puerto Rico.

Full streamgauge inventory

Puerto Rico USGS streamgauges

Every USGS gauge Snoflo tracks in Puerto Rico. Sortable, quickly filterable. Numeric columns heat-mapped from light to deep. Tap any gauge for its full hydrograph and forecast.

78 gauges
Streamgage Streamflow Gage height Water temp Air temp Elevation Watershed
Rio Saliente At Coabey Nr Jayuya, Pr
7 days ago · USGS 50025155
12 cfs 3.08 ft · 82°F 1,688 ft ·
Rio Caonillas At Paso Palma, Pr
7 days ago · USGS 50026025
47 cfs 3.81 ft · 82°F 965 ft ·
Rio Bauta Nr Orocovis, Pr
7 days ago · USGS 50034000
22 cfs 3.89 ft · 79°F 811 ft ·
Rio Grande De Arecibo Abv Utuado, Pr
7 days ago · USGS 50021700
45 cfs 4.09 ft · 84°F 516 ft ·
Rio Grande De Manati Nr Morovis, Pr
8 years ago · USGS 50031200
116 cfs 1.71 ft · 80°F 445 ft ·
Rio Guajataca At Lares, Pr
7 days ago · USGS 50010500
2 cfs 7.97 ft · 83°F 943 ft ·
Rio Tanama Nr Utuado, Pr
7 days ago · USGS 50028000
27 cfs 3.27 ft · 85°F 948 ft ·
Rio Grande De Arecibo Blw Utuado, Pr
7 days ago · USGS 50024950
110 cfs 4.46 ft · 86°F 311 ft ·
Rio Grande De Manati At Ciales, Pr
7 days ago · USGS 50035000
134 cfs 2.48 ft · 87°F 145 ft ·
Rio Limon Abv Lago Dos Bocas, Pr
7 days ago · USGS 50027000
42 cfs 7.85 ft · 87°F 319 ft ·
Rio Cibuco Blw Corozal, Pr
8 years ago · USGS 50038320
1,710 cfs 4.23 ft · 84°F 188 ft ·
Rio Camuy Nr Bayaney, Pr
7 days ago · USGS 50014800
63 cfs 4.98 ft · 85°F 354 ft ·
Rio Grande De Arecibo Nr San Pedro, Pr
7 days ago · USGS 50027600
97 cfs 6.57 ft · 89°F 72 ft ·
Rio Guajataca Blw Lago Guajataca, Pr
7 days ago · USGS 50011200
6 cfs 5.22 ft · 85°F 557 ft ·
Canal Diversion Lago Guajataca, Pr
7 days ago · USGS 50011000
55 cfs 3.28 ft · 85°F 661 ft ·
Rio Tanama At Charco Hondo, Pr
7 days ago · USGS 50028400
50 cfs 3.41 ft · 88°F 57 ft ·
Rio Grande De Manati At Hwy 2 Nr Manati, Pr
6 years ago · USGS 50038100
1,290 cfs 10.47 ft · 85°F 15 ft ·
Rio Cibuco At Vega Baja, Pr
7 days ago · USGS 50039500
52 cfs 4.46 ft · 90°F 21 ft ·
Rio Grande De Arecibo At Central Cambalache, Pr
7 years ago · USGS 50029000
24 cfs · · 86°F 10 ft ·
Rio Guanajibo Nr Hormigueros, Pr
7 days ago · USGS 50138000
87 cfs 9.69 ft · 88°F 14 ft ·
Rio Rosario Nr Hormigueros, Pr
7 days ago · USGS 50136400
26 cfs 1.42 ft · 88°F 164 ft ·
Rio Grande De Anasco Nr San Sebastian, Pr
7 days ago · USGS 50144000
179 cfs 2.47 ft · 88°F 120 ft ·
Rio Culebrinas At Hwy 404 Nr Moca, Pr
7 days ago · USGS 50147800
217 cfs 9.68 ft · 90°F 52 ft ·
Rio Culebrinas At Margarita Damsite Nr Aguada, Pr
8 months ago · USGS 50148890
1,640 cfs 9.70 ft · 90°F 16 ft ·
Canal De Patillas Abv Guayama Filtration Plant, Pr
7 days ago · USGS 50093075
22 cfs 2.62 ft · 87°F 107 ft ·
Canal De Patillas Blw Guayama Filtration Plant, Pr
7 days ago · USGS 50093078
11 cfs 1.49 ft · 87°F 101 ft ·
Rio Grande De Patillas Nr Patillas, Pr
7 days ago · USGS 50092000
67 cfs 5.18 ft · 87°F 238 ft ·
Rio Marin Nr Patillas, Pr
7 days ago · USGS 50093000
17 cfs 6.66 ft · 87°F 297 ft ·
Canal De Riego De Lajas At Bo. Palmarejo Nr Lajas, Pr
7 days ago · USGS 50128945
10 cfs 1.70 ft · 90°F 112 ft ·
Canal De Riego De Lajas Blw Lago Loco Dam Yauco Pr, Pr
7 days ago · USGS 50128905
40 cfs 1.10 ft · 90°F 203 ft ·
Rio Guayanilla Near Guayanilla, Pr
7 days ago · USGS 50124200
15 cfs 4.86 ft · 89°F 94 ft ·
Rio Majada At La Plena, Pr
7 days ago · USGS 50100450
2 cfs 2.96 ft · 88°F 422 ft ·
Canal De Riego De Lajas Abv Majinas Filt. Plant Pr, Pr
7 days ago · USGS 50128920
38 cfs 2.16 ft · 90°F 185 ft ·
Canal De Riego De Lajas Blw Majinas Filt. Plant Pr, Pr
7 days ago · USGS 50128925
32 cfs 2.99 ft · 90°F 192 ft ·
Canal De Riego De Lajas Blw Lajas Filt Plant Lajas, Pr
7 days ago · USGS 50128940
12 cfs 1.52 ft · 90°F 134 ft ·
Rio Yauco Abv Diversion Monserrate Nr Yauco, Pr
7 days ago · USGS 50126150
4 cfs 1.50 ft · 90°F 131 ft ·
Rio Lapa Nr Rabo Del Buey, Pr
7 days ago · USGS 50100200
1 cfs 5.34 ft · 86°F 395 ft ·
Rio Cerrillos Nr Ponce, Pr
7 days ago · USGS 50114000
6 cfs · · 87°F 284 ft ·
Rio Coamo At Hwy 14 At Coamo, Pr
7 days ago · USGS 50106100
5 cfs 4.63 ft · 86°F 342 ft ·
Rio Inabon At Real Abajo, Pr
7 days ago · USGS 50112500
14 cfs 1.52 ft · 85°F 423 ft ·
Rio Portugues Nr Tibes, Pr
7 days ago · USGS 50114900
4 cfs 4.48 ft · 84°F 832 ft ·
Rio Cerrillos Abv Lago Cerrillos Nr Ponce, Pr
7 days ago · USGS 50113800
15 cfs · · 82°F 714 ft ·
Rio Toa Vaca Abv Lago Toa Vaca, Pr
7 days ago · USGS 50110900
7 cfs 1.78 ft · 83°F 565 ft ·
Rio Maunabo At Lizas, Pr
7 days ago · USGS 50090500
18 cfs 4.14 ft · 86°F 199 ft ·
Rio Guayanes Nr Yabucoa, Pr
7 days ago · USGS 50083500
64 cfs 10.96 ft · 86°F 52 ft ·
Rio Guayanes At Central Roig, Pr
7 days ago · USGS 50085100
97 cfs 13.48 ft · 86°F 34 ft ·
Rio Grande De Loiza At Quebrada Arenas, Pr
7 days ago · USGS 50050900
41 cfs 5.29 ft · 83°F 649 ft ·
Rio Cayaguas At Cerro Gordo, Pr
7 days ago · USGS 50051310
16 cfs 6.31 ft · 85°F 520 ft ·
Rio Turabo Abv Borinquen, Pr
7 days ago · USGS 50053025
21 cfs 4.19 ft · 85°F 492 ft ·
Rio De Bayamon At Arenas, Pr
7 days ago · USGS 50047535
0 cfs 1.62 ft · 81°F 1,371 ft ·
Rio Humacao At Las Piedras, Pr
7 days ago · USGS 50081000
17 cfs · · 86°F 271 ft ·
Rio Grande De Loiza At Hwy 183 San Lorenzo, Pr
7 days ago · USGS 50051800
99 cfs 7.80 ft · 87°F 255 ft ·
Rio De Bayamon Blw Lago Cidra, Pr
7 days ago · USGS 50047560
7 cfs 5.90 ft · 81°F 1,280 ft ·
Rio Valenciano Nr Juncos, Pr
7 days ago · USGS 50056400
39 cfs 3.42 ft · 86°F 225 ft ·
Rio De La Plata At Comerio, Pr
7 days ago · USGS 50043800
59 cfs 5.58 ft · 84°F 623 ft ·
Rio Blanco Nr Florida, Pr
9 years ago · USGS 50076000
38 cfs 9.57 ft · 86°F 52 ft ·
Rio Gurabo Blw El Mango, Pr
7 days ago · USGS 50055750
160 cfs 8.68 ft · 86°F 227 ft ·
Rio Grande De Loiza At Caguas, Pr
7 days ago · USGS 50055000
142 cfs 4.94 ft · 88°F 162 ft ·
Rio Caguitas At Villa Blanca At Caguas, Pr
7 days ago · USGS 50055225
16 cfs 8.04 ft · 88°F 165 ft ·
Rio Gurabo At Gurabo, Pr
7 days ago · USGS 50057000
268 cfs 5.62 ft · 86°F 147 ft ·
Rio Bairoa Abv Bairoa, Pr
7 days ago · USGS 50055380
3 cfs 4.25 ft · 88°F 226 ft ·
Rio Icacos Nr Naguabo, Pr
10 months ago · USGS 50075000
28 cfs 1.47 ft 70°F 74°F 2,034 ft ·
Rio Fajardo At Paraiso Nr Fajardo, Pr
7 days ago · USGS 50070900
6 cfs 4.34 ft · 87°F 223 ft ·
Rio Canas At Rio Canas, Pr
7 days ago · USGS 50058350
7 cfs 9.25 ft · 87°F 152 ft ·
Rio Fajardo Nr Fajardo, Pr
7 days ago · USGS 50071000
13 cfs 2.96 ft · 87°F 158 ft ·
Rio Guadiana Nr Guadiana, Pr
7 days ago · USGS 50044810
10 cfs 1.85 ft · 88°F 249 ft ·
Rio Canovanas Nr Campo Rico, Pr
7 days ago · USGS 50061800
32 cfs 2.67 ft · 88°F 229 ft ·
Rio Mameyes Nr Sabana, Pr
7 days ago · USGS 50065500
82 cfs 2.46 ft · 83°F 288 ft ·
Rio Sabana At Sabana, Pr
7 days ago · USGS 50067000
6 cfs 7.94 ft · 86°F 306 ft ·
Rio De Bayamon Nr Bayamon, Pr
7 days ago · USGS 50047850
11 cfs 1.88 ft · 87°F 97 ft ·
Rio Grande De Loiza Blw Damsite Loiza, Pr
7 days ago · USGS 50059050
347 cfs 4.71 ft · 86°F 44 ft ·
Rio Grande Nr El Verde, Pr
7 days ago · USGS 50064200
24 cfs 5.29 ft · 89°F 131 ft ·
Quebrada Las Curias Blw Las Curias Outflow, Pr
10 years ago · USGS 50048690
0 cfs 7.18 ft · 89°F 258 ft ·
Rio De La Plata Blw La Plata Damsite, Pr
7 days ago · USGS 50045010
1 cfs 7.07 ft · 86°F 64 ft ·
Quebrada Grande At Bo. Dos Bocas, Pr
7 days ago · USGS 50059210
4 cfs 3.96 ft · 87°F 43 ft ·
Rio Espiritu Santo Nr Rio Grande, Pr
7 days ago · USGS 50063800
77 cfs 3.67 ft · 89°F 41 ft ·
Rio Piedras At Hato Rey, Pr
7 days ago · USGS 50049100
17 cfs 3.70 ft · 88°F 13 ft ·
Rio De La Plata At Hwy 2 Nr Toa Alta, Pr
7 days ago · USGS 50046000
53 cfs 3.50 ft · 88°F 12 ft ·
Flow report FAQ

About Puerto Rico streamflow

Where does the Puerto Rico streamflow data come from?

The U.S. Geological Survey National Water Information System. USGS streamgauges report continuously (every 15 minutes) and the data is the canonical real-time record for U.S. rivers. Snoflo pulls the latest readings and joins them to a 7-day NOAA weather forecast for each station.

What is cfs?

Cubic feet per second — the standard unit for streamflow. One cfs is about 7.5 gallons per second. Small creeks run at single-digit cfs; the Mississippi at hundreds of thousands.

What does Gauge Height mean?

The water level at the gauge in feet above the reference datum. Used together with discharge to track river state. Flood stage and runnable levels are typically expressed in gauge height (e.g., "flood at 16 ft").

How fresh is the Puerto Rico data?

USGS streamgauges report every 15 minutes; Snoflo re-pulls throughout the day. The AI briefing regenerates daily.

Can I get a flow alert for a Puerto Rico gauge?

Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a discharge or stage threshold (e.g. "alert me when discharge crosses 2,000 cfs"), and you'll get a push the moment it crosses.

Is this a substitute for an NWS flood warning?

No. Snoflo is informational. For flood life-safety decisions always follow guidance from your local NWS forecast office and state emergency management. Snoflo data is one input among several.