Safe Harbor Port Annapolis
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Boat launches near Safe Harbor Port Annapolis
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Typical flow by month
1977 to 2026
The water at Safe Harbor Port Annapolis typically runs highest in April, at a median 396 cfs, and lowest in September, at 134 cfs. The highest flow on record for any single day is 13,700 cfs, in 2011.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 292 | 200 to 465 | |
| February | 337 | 227 to 526 | |
| March | 375 | 253 to 623 | |
| April | 396 | 243 to 600 | |
| May | 311 | 203 to 522 | |
| June | 215 | 156 to 371 | |
| July | 165 | 117 to 279 | |
| August | 148 | 109 to 262 | |
| September | 134 | 104 to 204 | |
| October | 144 | 113 to 251 | |
| November | 192 | 151 to 314 | |
| December | 249 | 174 to 434 |
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 49 years of record. Statistics published by the US Geological Survey for Patuxent River near Bowie, MD (site 01594440). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Waves
2.0 ft @ 3s
Wind
12 kt
Gusts 27 kt
Water
76°F
Air
60°F
Streamflow
473 cfs
Above normal (85th)
Water level
6.55 ft
Rain chance
41%
Forecast outlook
Forecast from Open-Meteo global models (NOAA & ECMWF). See full conditions →
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