National Harbor Marina
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Operator details
- Vessels
- Powerboat
Boat launches near National Harbor Marina
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- Capital Cove Marina (Bolling Air Force Base)Trailer ramp
- Daingerfield Island Sailing ClubTrailer ramp
- Gravelly PointTrailer ramp
- Gravelly Point Boat RampTrailer ramp
- Ft. Washington MarinaTrailer ramp
- Columbia Island Marina Boat RampTrailer ramp
- Anacostia Park Boat RampTrailer ramp
- Marshall HallTrailer ramp
Typical flow by month
1966 to 2025
The water at National Harbor Marina typically runs highest in March, at a median 50 cfs, and lowest in September, at 3.9 cfs. The highest flow on record for any single day is 4,500 cfs, in 1979.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 39 | 20 to 59 | |
| February | 43 | 30 to 67 | |
| March | 50 | 32 to 79 | |
| April | 44 | 30 to 66 | |
| May | 30 | 17 to 52 | |
| June | 14 | 6.6 to 28 | |
| July | 7.3 | 1.9 to 18 | |
| August | 6.1 | 1.1 to 16 | |
| September | 3.9 | 0.2 to 15 | |
| October | 7.0 | 2.7 to 26 | |
| November | 15 | 7.0 to 36 | |
| December | 30 | 14 to 56 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 58 years of record. Statistics published by the US Geological Survey for Piscataway Creek at Piscataway, MD (site 01653600). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
High today
65°F
Wind
11 kt
Gusts 26 kt
Rain chance
69%
Week ahead
Forecast from Open-Meteo global models (NOAA & ECMWF). See full conditions →
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