Rio Grande De Patillas below Lago Patillas water level

Name: Rio Grande De Patillas below Lago Patillas water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Canal gauge, Rio Grande De Patillas, Puerto Rico, United States

Directions

Low for mid-October

Water level

4.33ft Steady over the last 24 hours

Measured Oct 20, 2026, 09:15 PM AST (35 min ago)

Flow: 0.0 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

The Rio Grande De Patillas below Lago Patillas is running below normal at 4.33 ft.

The median for mid-October is 5.11 ft, based on 21 years of readings, so the canal level is 0.78 ft below typical. On the same day last year the reading was 4.29 ft, a difference of +0.04 ft.

It has barely moved over the past 24 hours. In the last month it has stayed between 4.24 ft and 6.31 ft.

Compared with 21 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 5.11 ft0.78 ft below the median for this date
Normal for this date: 4.28 ft – 5.84 ft8 years in 10 fall in this range (21 years of records)
Same day last year: 4.29 ft+0.04 ft
Lowest and highest in 30 days: 4.24 ft – 6.31 ft
Lowest and highest in 12 months: 3.07 ft – 6.98 ft

Weather at the gauge

Rain in the last 3 days: 0.23 in. Rain that falls upstream can take hours or days to show up at a river gauge.

20 Tue 87° 74° 0.02 in, 35% Wind 7 mph

21 Wed 86° 76° 0.09 in, 52% Wind 8 mph

22 Thu 85° 74° 0.05 in, 63% Wind 7 mph

23 Fri 84° 76° 0.33 in, 73% Wind 10 mph

24 Sat 85° 74° 0.23 in, 84% Wind 11 mph

25 Sun 85° 77° 0.20 in, 83% Wind 8 mph

26 Mon 86° 77° 0.18 in, 82% Wind 8 mph

Forecast: Open-Meteo

Sunrise 06:20 AM Sunset 05:59 PM Daylight 11 hr, 39 min Waxing gibbous 73%

Map

Other gauges on the Rio Grande De Patillas

Gauge	Level	Compared with normal	24 hours	Distance
Rio Grande De Patillas near PatillasRiver gauge, Rio Grande De Patillas	4.63 ft	Normal	−0.02 ft	1.4 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Canal De Patillas at ForebayCanal gauge, Canal De Patillas	1.57 ft	Normal	±0	0.3 mi
Rio Marin near PatillasRiver gauge, Rio Marin	6.52 ft	Normal	+0.01 ft	1.7 mi
Rio Maunabo at LizasRiver gauge, Rio Maunabo	3.65 ft	Normal	+0.01 ft	5.5 mi
Canal De Patillas above Guayama Filtration PlantCanal gauge, Canal De Patillas	2.63 ft	High	±0	5.6 mi
Canal De Patillas below Guayama Filtration PlantCanal gauge, Canal De Patillas	1.43 ft	Normal	±0	5.6 mi
Canal De Guamani Oeste at Highway 15 GuayamaCanal gauge, Canal De Guamani Oeste	1.34 ft	Normal	−0.01 ft	6.1 mi
Rio Grande De Loiza at Quebrada ArenasRiver gauge, Rio Grande De Loiza	5.07 ft	Normal	−0.01 ft	8 mi
Aes Intake Canal at Canal De Patillas, GuayamaCanal gauge, Aes Intake Canal	1.46 ft	Normal	−0.02 ft	8 mi

Questions and answers

Is the Rio Grande De Patillas below Lago Patillas higher than last year?

Yes, it is 0.04 ft higher than on the same day last year, when the reading was 4.29 ft.

What is a normal level for the Rio Grande De Patillas below Lago Patillas in mid-October?

The median for mid-October is 5.11 ft. In 8 years out of 10 the reading falls between 4.28 ft and 5.84 ft, based on 21 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Rio Grande De Patillas below Lago Patillas today?

On Oct 20, 2026, 09:15 PM AST, the water level was 4.33 ft. Steady over the last 24 hours.

Is Rio Grande De Patillas below Lago Patillas rising or falling?

Steady over the last 24 hours. Down 1.94 ft over the last 7 days.

Is the level of Rio Grande De Patillas below Lago Patillas normal?

Low for mid-October. Compared with 21 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:50093120 (Agency page)
Coordinates: 18.01639, -66.02361 (WGS84)
Vertical datum: PRVD02
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	4.33 ft	2026-10-21 01:15	Provisional
Flow	0.0 cfs	2026-10-21 01:15	Provisional

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How to cite

U.S. Geological Survey: Rio Grande De Patillas below Lago Patillas (usgs:50093120). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/puerto-rico/rio-grande-de-patillas-below-lago-patillas

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer