Rio Grande De Loiza at Caguas water level

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

River gauge, Rio Grande De Loiza, Puerto Rico, United States

Directions

Very low for mid-October

Water level

4.37ft Down 0.06 ft over the last 24 hours

Measured Oct 20, 2026, 05:30 AM AST (1 hour ago)

Flow: 47.7 cfs

History

7 days 30 days 1 year Years compared

20252026

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

What this means

Low water at Rio Grande De Loiza at Caguas: the gauge reads 4.37 ft, far below normal for mid-October.

That puts it 0.74 ft below the median of 5.11 ft for mid-October, based on 37 years of readings. It is 11.63 ft below the flood stage of 16.00 ft. A year ago it stood at 4.29 ft (+0.08 ft).

It is still going down, by 0.06 ft over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. The 30-day range is 4.20 ft – 5.97 ft.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 37 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 5.11 ft0.74 ft below the median for this date
Normal for this date: 4.50 ft – 6.76 ft8 years in 10 fall in this range (37 years of records)
Same day last year: 4.29 ft+0.08 ft
Lowest and highest in 30 days: 4.20 ft – 5.97 ft
Lowest and highest in 12 months: 3.97 ft – 7.56 ft
Highest on record: 33.20 ftAugust 4, 1945

Paddling and fishing conditions

At low levels, plan for shorter paddling trips and expect to walk your boat through a few shoals.

For reference, flood stage is 16.00 ft.

Highest crests on record

Rank	Level	Date
1	33.20 ft	August 4, 1945
2	32.32 ft	September 10, 1996
3	31.17 ft	September 6, 1960
4	29.30 ft	October 9, 1970
5	28.91 ft	September 18, 2022
6	26.07 ft	August 27, 1961
7	25.64 ft	September 21, 1998
8	24.48 ft	September 20, 2017
9	24.32 ft	January 5, 1992
10	24.20 ft	June 17, 1970

Weather at the gauge

Rain in the last 3 days: 0.19 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 88° 75° 0.22 in, 90% Wind 7 mph

18 Sun 89° 76° 0.10 in, 100% Wind 6 mph

19 Mon 88° 74° 0.14 in, 100% Wind 6 mph

20 Tue 90° 74° 0.07 in, 93% Wind 6 mph

21 Wed 90° 73° 0.01 in, 66% Wind 8 mph

22 Thu 88° 75° 0.07 in, 74% Wind 9 mph

23 Fri 88° 75° 0.24 in, 51% Wind 8 mph

Forecast: Open-Meteo

Sunrise 06:20 AM Sunset 05:59 PM Daylight 11 hr, 40 min First quarter 67%

Map

Other gauges on the Rio Grande De Loiza

Gauge	Level	Compared with normal	24 hours	Distance
Rio Grande De Loiza at Quebrada ArenasRiver gauge, Rio Grande De Loiza	5.10 ft	Normal	±0	9 mi
Rio Grande De Loiza at Highway 183 San LorenzoRiver gauge, Rio Grande De Loiza	7.39 ft	Very low	−0.01 ft	5.0 mi
Rio Grande De Loiza below Loiza DamsiteRiver gauge, Rio Grande De Loiza	2.72 ft	Low	+0.04 ft	7 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Rio Caguitas at Villa Blanca at CaguasRiver gauge, Rio Caguitas	7.92 ft	Normal	−0.04 ft	1.3 mi
Rio Bairoa above Bairoa, CaguasRiver gauge, Rio Bairoa	4.20 ft	Low	−0.03 ft	2.5 mi
Rio Gurabo at GuraboRiver gauge, Rio Gurabo	5.37 ft	Normal	+1.25 ft	2.9 mi
Rio Canas at Rio CanasRiver gauge, Rio Canas	9.00 ft	Very low	−0.05 ft	4.3 mi
Rio Valenciano near JuncosRiver gauge, Rio Valenciano	3.03 ft	Normal	+0.12 ft	5.8 mi
Rio Turabo above BorinquenRiver gauge, Rio Turabo	3.65 ft	Very low	−0.01 ft	5.9 mi
Rio Cayaguas at Cerro GordoRiver gauge, Rio Cayaguas	5.93 ft	Normal	±0	7 mi
Quebrada Grande at Bo. Dos BocasRiver gauge, Quebrada Grande	4.08 ft	Very low	−0.06 ft	8 mi

Questions and answers

How does the Rio Grande De Loiza at Caguas compare with last year?

It is 0.08 ft higher than on the same day last year, when the reading was 4.29 ft.

What is flood stage for the Rio Grande De Loiza at Caguas?

The official flood stage is 16.00 ft. The level is currently 11.63 ft below it.

What is a normal level for the Rio Grande De Loiza at Caguas in mid-October?

The median for mid-October is 5.11 ft. In 8 years out of 10 the reading falls between 4.50 ft and 6.76 ft, based on 37 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 Loiza at Caguas today?

On Oct 20, 2026, 05:30 AM AST, the water level was 4.37 ft. Down 0.06 ft over the last 24 hours.

Is Rio Grande De Loiza at Caguas rising or falling?

Down 0.06 ft over the last 24 hours. Down 0.41 ft over the last 7 days.

Is the level of Rio Grande De Loiza at Caguas normal?

Very low for mid-October. Compared with 37 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:50055000 (Agency page)
Coordinates: 18.24269, -66.00959 (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	4.37 ft	2026-10-20 09:30	Provisional
Flow	47.7 cfs	2026-10-20 09:30	Provisional

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How to cite

U.S. Geological Survey: Rio Grande De Loiza at Caguas (usgs:50055000). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/puerto-rico/rio-grande-de-loiza-at-caguas

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