About this river
Gwynns Falls is a 3.0 mile stream near Maryland Marina in Maryland. Streamflow is measured at the USGS gauge Gwynns Falls at Washington Blvd at Baltimore, MD (site 01589352). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1999 to 2026
Gwynns Falls typically runs highest in March, at a median 65 cfs, and lowest in September, at 28 cfs. The highest flow on record for any single day is 5,740 cfs, in 2014.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 51 | 39 to 76 | |
| February | 59 | 43 to 99 | |
| March | 65 | 46 to 104 | |
| April | 61 | 46 to 84 | |
| May | 54 | 40 to 93 | |
| June | 46 | 32 to 74 | |
| July | 39 | 28 to 75 | |
| August | 33 | 23 to 60 | |
| September | 28 | 20 to 56 | |
| October | 31 | 23 to 54 | |
| November | 36 | 28 to 63 | |
| December | 49 | 32 to 86 |
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 27 years of record. Statistics published by the US Geological Survey for Gwynns Falls at Washington Blvd at Baltimore, MD (site 01589352). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
One mapped launch sits in the mapped area of Gwynns Falls. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Gwynns Falls's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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