Rio Grande De Anasco near San Sebastian water level
River gauge, Rio Grande De Anasco, Puerto Rico, United States
Right now
Normal for mid-October
Water level
- Flow
- 289 cfs
History
20252026
What this means
Water levels are unremarkable at Rio Grande De Anasco near San Sebastian, where the gauge shows 2.82 ft.
That puts it 0.16 ft below the median of 2.98 ft for mid-October, based on 37 years of readings. It is 9.68 ft below the flood stage of 12.50 ft. A year ago it stood at 3.62 ft (−0.80 ft).
It is still going down, by 0.31 ft over the past 24 hours. The 30-day range is 2.31 ft – 6.57 ft.
Fall is often low-water season on rivers, until steadier rain returns.
Compared with 37 years of daily readings for this time of year. How to read levels
Key numbers
- Median for this date
- 2.98 ft0.16 ft below the median for this date
- Normal for this date
- 2.17 ft – 4.48 ft8 years in 10 fall in this range (37 years of records)
- Same day last year
- 3.62 ft−0.80 ft
- Lowest and highest in 30 days
- 2.31 ft – 6.57 ft
- Lowest and highest in 12 months
- 2.04 ft – 4.94 ft
- Highest on record
- 35.84 ftSeptember 20, 2017
Paddling and fishing conditions
Most paddlers and anglers will find the river in good shape at this stage.
For reference, flood stage is 12.50 ft.
What happens at each level
- 17.00 ft
- Flood waters could reach houses close to the river in Sector Pagan, Sector Pozo Hondo and Barrio Playa. Road PR-2 will become impassable./erg-05-2025
- 15.50 ft
- Flood waters could reach houses close to the river in Barrio Cidra and Barrio Espino./erg-05/2025
- 12.50 ft
- Minor flooding of plantain fields. /OMS 8/11/2020
- 2.82 ft
- Right now
Impact statements from the U.S. National Weather Service.
Highest crests on record
| Rank | Level | Date |
|---|---|---|
| 1 | 35.84 ft | September 20, 2017 |
| 2 | 34.50 ft | September 22, 1998 |
| 3 | 33.90 ft | September 16, 1975 |
| 4 | 26.77 ft | May 18, 1985 |
| 5 | 26.21 ft | September 18, 2022 |
| 6 | 21.94 ft | October 7, 1985 |
| 7 | 21.43 ft | May 8, 2024 |
| 8 | 21.33 ft | September 10, 1996 |
| 9 | 20.33 ft | September 3, 2008 |
| 10 | 19.61 ft | October 26, 1971 |
Weather at the gauge
Rain in the last 3 days: 0.50 in. Rain that falls upstream can take hours or days to show up at a river gauge.
Forecast: Open-Meteo
Map
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Rio Culebrinas at Highway 404 near MocaRiver gauge, Rio Culebrinas | 10.51 ft | Normal | −11.13 ft | 6.0 mi |
| Rio Rosario near HormiguerosRiver gauge, Rio Rosario | 1.78 ft | Very low | −0.22 ft | 9 mi |
| Rio Culebrinas at Margarita Damsite near AguadaRiver gauge, Rio Culebrinas | 10.26 ft | Very high | −5.50 ft | 10 mi |
| Canal De Derivacion at Lago De GuajatacaCanal gauge, Canal De Derivacion | 3.27 ft | Normal | −0.14 ft | 11 mi |
| Rio Guajataca below Lago GuajatacaRiver gauge, Rio Guajataca | 7.85 ft | Very high | +0.16 ft | 11 mi |
| Rio Guajataca at LaresRiver gauge, Rio Guajataca | 8.61 ft | Very high | −0.10 ft | 12 mi |
| Rio Guanajibo near HormiguerosRiver gauge, Rio Guanajibo | 10.50 ft | Low | −0.33 ft | 12 mi |
| Canal De Moca above Lago Regulador E13 IsabelaCanal gauge, Canal De Moca | 1.66 ft | Normal | −0.13 ft | 12 mi |
Questions and answers
How does the Rio Grande De Anasco near San Sebastian compare with last year?
It is 0.80 ft lower than on the same day last year, when the reading was 3.62 ft.
What is flood stage for the Rio Grande De Anasco near San Sebastian?
The official flood stage is 12.50 ft. The level is currently 9.68 ft below it.
What is a normal level for the Rio Grande De Anasco near San Sebastian in mid-October?
The median for mid-October is 2.98 ft. In 8 years out of 10 the reading falls between 2.17 ft and 4.48 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 Anasco near San Sebastian today?
On Oct 20, 2026, 06:00 PM AST, the water level was 2.82 ft. Down 0.31 ft over the last 24 hours.
Is Rio Grande De Anasco near San Sebastian rising or falling?
Down 0.31 ft over the last 24 hours. Up 0.26 ft over the last 7 days.
Is the level of Rio Grande De Anasco near San Sebastian normal?
Normal 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:50144000(Agency page)- Coordinates
18.28417, -67.05096(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 | 2.82 ft | 2026-10-20 22:00 | Provisional |
| Flow | 289 cfs | 2026-10-20 22:00 | Provisional |
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How to cite
U.S. Geological Survey: Rio Grande De Anasco near San Sebastian (usgs:50144000). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/puerto-rico/rio-grande-de-anasco-near-san-sebastian
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