About this river
Saint Johns River is a 33.3 mile river near Holly Bluff Resort Marina in Florida. Streamflow is measured at the USGS gauge ST. Johns River at Astor, FL (site 02236125). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1994 to 2026
Saint Johns River typically runs highest in October, at a median 5,230 cfs, and lowest in May, at 1,390 cfs. The highest flow on record for any single day is 17,200 cfs, in 2023.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 2,730 | 1,670 to 4,410 | |
| February | 2,260 | 1,360 to 3,440 | |
| March | 1,960 | 866 to 3,170 | |
| April | 1,665 | 585 to 2,645 | |
| May | 1,390 | 423 to 2,240 | |
| June | 1,890 | 988 to 2,870 | |
| July | 3,090 | 2,070 to 3,860 | |
| August | 3,480 | 1,980 to 4,950 | |
| September | 4,185 | 2,755 to 5,945 | |
| October | 5,230 | 3,610 to 8,080 | |
| November | 4,710 | 2,635 to 7,775 | |
| December | 3,660 | 2,100 to 5,780 |
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 32 years of record. Statistics published by the US Geological Survey for ST. Johns River at Astor, FL (site 02236125). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
8 mapped launches sit in the mapped area of Saint Johns River. Ramp data comes from the USGS national boat-ramp inventory.
- High Banks Road Public Boat RampSt. Johns RiverPublic
- Volusia Blue Spring State Park - French LandingSt. Johns RiverPublic
- Lake Beresford Yacht ClubSt. Johns River - Lake BeresfordRestricted
- Sunrise Fish CampSt. Johns River - Lake BeresfordRestricted
- Riviera Marina And ResortSt. Johns RiverRestricted
- Ed Stone Park and Boat RampSt. Johns RiverPublic
- St. Johns MarinaSt. Johns RiverRestricted
- Ocala National Forest - Cowpen Pond Undeveloped Access SiteCowpen PondPublic
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Saint Johns River'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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