About this river
Saint Johns River is a 35.6 mile river near Cocoa Beach Jet Ski Tours in Florida. Streamflow is measured at the USGS gauge ST. Johns River near Melbourne, FL (site 02232000). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1940 to 2026
Saint Johns River typically runs highest in October, at a median 1,220 cfs, and lowest in May, at 81 cfs. The highest flow on record for any single day is 18,000 cfs, in 1957.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 261 | 126 to 509 | |
| February | 240 | 128 to 499 | |
| March | 181 | 92 to 438 | |
| April | 114 | 61 to 380 | |
| May | 81 | 42 to 178 | |
| June | 104 | 51 to 302 | |
| July | 371 | 127 to 981 | |
| August | 721 | 255 to 1,440 | |
| September | 1,025 | 458 to 1,690 | |
| October | 1,220 | 439 to 2,070 | |
| November | 553 | 240 to 1,300 | |
| December | 305 | 163 to 722 |
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 86 years of record. Statistics published by the US Geological Survey for ST. Johns River near Melbourne, FL (site 02232000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
6 mapped launches sit in the mapped area of Saint Johns River. Ramp data comes from the USGS national boat-ramp inventory.
- Sweetwater Boat RampSt. Johns RiverPublic
- Camp Holly Fishing & AirboatsSt. Johns RiverRestricted
- Lake Florence Primitive Boat RampSt. Johns River - Lake FlorencePublic
- Lake Poinsett Lodge and MarinaSt. Johns River - Lake PoinsettRestricted
- James G. Bourbeau ParkSt. Johns RiverPublic
- Leroy Wright Recreation AreaSt. Johns RiverPublic
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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