Potomac River at Wisconsin Ave, Washington water level
Estuary gauge, Potomac River, District of Columbia, United States
Right now
Below flood stage
Water level
History
The forecast expects the river to rise to 5.90 ft by Thursday, October 22 at 05:00 PM. Issued Tuesday, October 20 at 09:17 PM by NOAA National Weather Service.
What this means
The gauge at Potomac River at Wisconsin Ave, Washington reads 2.60 ft, a normal level.
It is 3.40 ft below the flood stage of 6.00 ft.
The water is rising: up 1.30 ft over the past 24 hours. The forecast expects the river to rise to 5.90 ft by Thursday, October 22 at 05:00 PM. There is still 3.40 ft of room before flood stage. Over the past 30 days it has moved between −1.11 ft and 2.76 ft.
Judged against the official flood stage for this gauge. How to read levels
Key numbers
- Highest on record
- 17.72 ftOctober 17, 1942
- Forecast peak
- 5.90 ftThursday, October 22 at 05:00 PM
What happens at each level
- 24.00 ft
- The Potomac River and C&O Canal form a single body of water upstream of Dalecarlia Reservoir. A portion of Canal Road begins to flood near Chain Bridge. Flooding and backwater cover much of lower Georgetown south of the Canal, and the Rock Creek Parkway south of M Street NW. The George Washington Parkway is flooded south of Spout Run in Arlington. Floodwaters reach Constitution Avenue near the Lincoln Memorial at the low spot on Henry Bacon Drive.
- 20.00 ft
- Significant flooding is occurring in lower Georgetown, with all of Water Street NW and K Street NW flooded west of Rock Creek. Floodwaters reach about halfway up Thomas Jefferson Street NW in Georgetown. Numerous buildings are flooded. Rock Creek Parkway is flooded south of Virginia Avenue NW, and portions of the Kennedy Center are flooded. Ohio Drive is flooded in the vicinity of the Lincoln Memorial.
- 18.00 ft
- Floodwaters reach the top of the protection of the floodgates at Washington Harbour.
- 17.50 ft
- All of Water Street NW and K Street NW are flooded between the Key Bridge and Rock Creek, with numerous roads and buildings in lower Georgetown affected. Multiple portions of the George Washington Parkway are flooded south of Spout Run. Rock Creek Parkway is flooded south of the Watergate Complex. Ohio Drive is flooded in the vicinity of Memorial Bridge.
- 16.50 ft
- A portion of Rock Creek and Potomac Parkway is flooded near the Kennedy Center. Much of lower Georgetown is flooded, including Water Street and K Street between 33rd and 30th, and all adjacent unprotected structures. Portions of the George Washington Parkway are also flooded between Spout Run Parkway and the Memorial Bridge.
- 15.50 ft
- A portion of Rock Creek and Potomac Parkway near the Kennedy Center begins to flood. A significant portion of lower Georgetown is flooded, including K Street between Wisconsin Avenue and 30th Street NW. Portions of Ohio Drive near the Lincoln Memorial also are flooded. On the Virginia side of the river, portions of the George Washington Memorial Parkway are flooded between Key Bridge and Memorial Bridge.
- 14.50 ft
- Portions of the George Washington Parkway begin to flood between the Roosevelt Island access point and the Memorial Bridge.
- 13.50 ft
- K Street is flooded between Wisconsin Avenue and 30th Street. Backwater flooding along Rock Creek is affecting buildings between the C&O Canal and the Potomac.
- 12.00 ft
- Floodwaters reach Georgetown Waterfront Park at the foot of Wisconsin Avenue in Georgetown. Low spots on Ohio Drive SW near the Memorial Bridge begin to flood.
- 11.00 ft
- The river reaches a height in which usual high and low tides are no longer observed. From this point the river will rise until crest and then fall. Overflow of the C&O Canal may cause water to flow down the walkways near the Georgetown Visitors Center. Access roads in the vicinity of the Fletchers Boathouse are flooded. Floodwaters approach portions of the Capital Crescent Trail.
- 10.00 ft
- Backwater flooding threatens structures along Rock Creek south of K Street. Water reaches the parking area at Fletcher's Boathouse. The Washington Canoe Club and Potomac Boat Club buildings are flooded. Water also reaches the parking lot and access road for Roosevelt Island.
- 8.00 ft
- Backwater flooding of Rock Creek in Georgetown begins at this level.
- 2.60 ft
- Right now
Impact statements from the U.S. National Weather Service.
Highest crests on record
| Rank | Level | Date |
|---|---|---|
| 1 | 17.72 ft | October 17, 1942 |
| 2 | 17.30 ft | March 19, 1936 |
| 3 | 15.45 ft | June 24, 1972 |
| 4 | 14.30 ft | April 28, 1937 |
| 5 | 13.88 ft | January 21, 1996 |
| 6 | 13.75 ft | September 9, 1996 |
| 7 | 11.76 ft | November 7, 1985 |
| 8 | 11.27 ft | September 19, 2003 |
| 9 | 10.42 ft | March 15, 2010 |
| 10 | 9.80 ft | October 13, 1893 |
Weather at the gauge
Rain in the last 3 days: 0.35 in. Rain that falls upstream can take hours or days to show up at a river gauge.
Forecast: Open-Meteo
Map
Other gauges on the Potomac River
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Potomac River at Paw PawRiver gauge, Potomac River | 5.24 ft | Below flood stage | −0.25 ft | 86 mi |
| Potomac River at HancockRiver gauge, Potomac River | 4.18 ft | Below flood stage | −0.24 ft | 81 mi |
| Potomac River at ShepherdstownRiver gauge, Potomac River | 2.76 ft | Below flood stage | −0.18 ft | 54 mi |
| Potomac River at Harpers FerryRiver gauge, Potomac River | 1.69 ft | No reference yet | −0.34 ft | 46 mi |
| Potomac River at Burkittsville Road at BrunswickRiver gauge, Potomac River | 3.10 ft | No reference yet | −0.18 ft | 41 mi |
| Potomac River at Point of RocksRiver gauge, Potomac River | 2.17 ft | Below flood stage | −0.18 ft | 36 mi |
| Potomac River at Edwards Ferry near PoolesvilleRiver gauge, Potomac River | 4.40 ft | Below flood stage | −0.23 ft | 26 mi |
| Potomac River near Wash, Dc Little Falls Pump StationRiver gauge, Potomac River | 3.35 ft | Below flood stage | −0.08 ft | 4.5 mi |
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Rock Creek at Joyce Rd WashingtonRiver gauge, Rock Creek | 1.30 ft | Below flood stage | −0.06 ft | 4.2 mi |
| Fourmile Run at AlexandriaRiver gauge, Fourmile Run | 4.07 ft | Below flood stage | ±0 | 4.3 mi |
| Hickey Run at National Arboretum at WashingtonRiver gauge, Hickey Run | 0.2 cfs | Normal | ±0 | 5.4 mi |
| Sligo Creek near Takoma ParkRiver gauge, Sligo Creek | 0.60 ft | Below flood stage | −0.01 ft | 7 mi |
| Watts Branch at WashingtonRiver gauge, Watts Branch | 4.14 ft | Below flood stage | ±0 | 7 mi |
| Dead Run at Whann Avenue near McLeanRiver gauge, Dead Run | 1.15 ft | Below flood stage | +0.01 ft | 7 mi |
| Cameron Run at AlexandriaRiver gauge, Cameron Run | 3.88 ft | Below flood stage | −0.01 ft | 7 mi |
| Northeast Branch Anacostia River at RiverdaleRiver gauge, Northeast Branch Anacostia River | 0.42 ft | Below flood stage | −0.03 ft | 9 mi |
Questions and answers
What is flood stage for the Potomac River at Wisconsin Ave, Washington?
The official flood stage is 6.00 ft. The level is currently 3.40 ft below it.
What is the water level of Potomac River at Wisconsin Ave, Washington today?
On Oct 21, 2026, 05:54 AM EDT, the water level was 2.60 ft. Up 1.30 ft over the last 24 hours.
Is Potomac River at Wisconsin Ave, Washington rising or falling?
Up 1.30 ft over the last 24 hours. Up 1.36 ft over the last 7 days.
Is the level of Potomac River at Wisconsin Ave, Washington normal?
Below flood stage. Judged against the official flood stage for this gauge.
What is the highest water level ever recorded at Potomac River at Wisconsin Ave, Washington?
The highest level on record is 17.72 ft on October 17, 1942.
Is Potomac River at Wisconsin Ave, Washington expected to rise?
The forecast expects the river to rise to 5.90 ft by Thursday, October 22 at 05:00 PM.
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:01647600(Agency page)- Coordinates
38.90336, -77.06767(WGS84)- Vertical datum
- NAVD88
- 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 | 2.60 ft | 2026-10-21 09:54 | Provisional |
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How to cite
U.S. Geological Survey: Potomac River at Wisconsin Ave, Washington (usgs:01647600). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/district-of-columbia/potomac-river-at-wisconsin-ave-washington
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