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Rio Coamo at Highway 14 at Coamo water level

River gauge, Rio Coamo, Puerto Rico, United States

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Right now

Normal for mid-October

Water level

4.77ft Up 0.06 ft over the last 24 hours

Flow
8.3 cfs
10 20 Highest onrecord 25.94 ft Minor floodstage 10.00 ft

History

History
46810ftOct 16Oct 17Oct 18Oct 19Oct 20Minor flood stage46810ftOct 16Oct 18Oct 20Minor flood stage
456ftSep 21Sep 28Oct 5Oct 13Oct 20456ftSep 21Oct 5Oct 20
35810ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Minor flood stage35810ftOct 2025Apr 2026Oct 2026Minor flood stage
3456ftJanMarMayJulSepNov20263456ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

The Rio Coamo at Highway 14 at Coamo is at 4.77 ft, in the normal range for mid-October.

The median for mid-October is 4.46 ft, based on 33 years of readings, so the river stage is 0.31 ft above typical. It is 5.23 ft below the flood stage of 10.00 ft. On the same day last year the reading was 4.64 ft, a difference of +0.13 ft.

It has risen 0.06 ft over the past 24 hours. There is still 5.23 ft of room before flood stage. In the last month it has stayed between 4.56 ft and 6.71 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 33 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
4.46 ft0.31 ft above the median for this date
Normal for this date
3.30 ft – 5.77 ft8 years in 10 fall in this range (33 years of records)
Same day last year
4.64 ft+0.13 ft
Lowest and highest in 30 days
4.56 ft – 6.71 ft
Lowest and highest in 12 months
4.44 ft – 5.32 ft
Highest on record
25.94 ftSeptember 21, 1998

Floating and fishing near Rio Coamo at Highway 14 at Coamo

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 10.00 ft, 5.23 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

Highest crests on record

RankLevelDate
125.94 ftSeptember 21, 1998
225.67 ftJanuary 5, 1992
320.34 ftSeptember 20, 2017
419.94 ftSeptember 10, 1996
516.58 ftSeptember 13, 2011
615.34 ftNovember 13, 2003
711.92 ftOctober 20, 1990
810.91 ftSeptember 29, 2019
910.89 ftSeptember 14, 1990
1010.69 ftSeptember 17, 2000

Weather at the gauge

Rain in the last 3 days: 0.41 in. Rain that falls upstream can take hours or days to show up at a river gauge.

20 Tue 87° 72° 0.05 in, 77% Wind 8 mph
21 Wed 87° 72° 0.04 in, 65% Wind 9 mph
22 Thu 84° 73° 0.27 in, 86% Wind 8 mph
23 Fri 86° 72° 0.17 in, 81% Wind 8 mph
24 Sat 86° 74° 0.11 in, 57% Wind 11 mph
25 Sun 88° 74° 0.12 in, 62% Wind 9 mph
26 Mon 89° 74° – Wind 8 mph

Forecast: Open-Meteo

Sunrise 06:21 AM Sunset 06:01 PM Daylight 11 hr, 40 min Waxing gibbous 70%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Canal De Juana Diaz at Paso Seco near Santa IsabelCanal gauge, Canal De Juana Diaz 1.38 ft Normal −0.18 ft 5.3 mi
Canal De Juana Diaz at Bo. Penuelas near SalinasCanal gauge, Canal De Juana Diaz 1.28 ft Very low −0.47 ft 5.9 mi
Rio Usabon at Highway 162 near BarranquitasRiver gauge, Rio Usabon 2.92 ft Very low −0.01 ft 6.2 mi
Rio Toa Vaca above Lago Toa VacaRiver gauge, Rio Toa Vaca 2.40 ft Low −2.58 ft 7 mi
Rio Lapa near Rabo Del BueyRiver gauge, Rio Lapa 5.29 ft Normal −0.01 ft 8 mi
Canal De Patillas at Intake 123, SalinasCanal gauge, Canal De Patillas 1.43 ft Normal +0.11 ft 8 mi
Canal De Patillas at Intake 113 SalinasCanal gauge, Canal De Patillas 1.34 ft High +0.07 ft 9 mi
Canal De Juana Diaz at Piedra Aguzada near Juana DiaCanal gauge, Canal De Juana Diaz 1.84 ft High +0.02 ft 9 mi

Questions and answers

Is the Rio Coamo at Highway 14 at Coamo higher than last year?

Yes, it is 0.13 ft higher than on the same day last year, when the reading was 4.64 ft.

What is flood stage for the Rio Coamo at Highway 14 at Coamo?

The official flood stage is 10.00 ft. The level is currently 5.23 ft below it.

What is a normal level for the Rio Coamo at Highway 14 at Coamo in mid-October?

The median for mid-October is 4.46 ft. In 8 years out of 10 the reading falls between 3.30 ft and 5.77 ft, based on 33 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 Coamo at Highway 14 at Coamo today?

On Oct 20, 2026, 01:00 PM AST, the water level was 4.77 ft. Up 0.06 ft over the last 24 hours.

Is Rio Coamo at Highway 14 at Coamo rising or falling?

Up 0.06 ft over the last 24 hours. Up 0.13 ft over the last 7 days.

Is the level of Rio Coamo at Highway 14 at Coamo normal?

Normal for mid-October. Compared with 33 years of daily readings for this time of year.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Geological Survey
Station code
usgs:50106100 (Agency page)
Coordinates
18.08351, -66.35482 (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

ParameterLast valueTime (UTC)Quality
Water level 4.77 ft 2026-10-20 17:00 Provisional
Flow 8.3 cfs 2026-10-20 17:00 Provisional

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How to cite

U.S. Geological Survey: Rio Coamo at Highway 14 at Coamo (usgs:50106100). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/puerto-rico/rio-coamo-at-highway-14-at-coamo

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.