Around here
Around Saint Marys River
- Okefenokee RV ParkRV park · ★ 4.37 mi (opens in a new tab)
- Okefenokee Pastimes Cabins and CampgroundRV park · ★ 4.611.3 mi (opens in a new tab)
- Cumberland Island National Seashore Camping PermitsCampground · Good for paddling22.3 mi
- Okefenokee National Wildlife Refuge Overnight Camping PermitCampground · 11 sites23.8 mi
Data Source: Recreation.gov · Public land: USGS PAD-US
About this river
Saint Marys River is a 62.1 mile river near Up The Creek Xpeditions in Georgia. Streamflow is measured at the USGS gauge ST. Marys River near Macclenny, FL (site 02231000). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1927 to 2026
Saint Marys River typically runs highest in August, at a median 518 cfs, and lowest in May, at 70 cfs. The highest flow on record for any single day is 33,300 cfs, in 2012.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 231 | 91 to 727 |
| February | 407 | 146 to 1,040 |
| March | 378 | 148 to 1,110 |
| April | 252 | 95 to 730 |
| May | 70 | 41 to 213 |
| June | 87 | 43 to 318 |
| July | 285 | 89 to 760 |
| August | 518 | 183 to 1,230 |
| September | 459 | 138 to 1,005 |
| October | 192 | 63 to 531 |
| November | 96 | 50 to 223 |
| December | 138 | 57 to 321 |
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 100 years of record. Statistics published by the US Geological Survey for ST. Marys River near Macclenny, FL (site 02231000). 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 Marys River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- Lonnie Wurn Boat RampSt. Johns RiverPublic
- Arlington Lions Club Park & Boat RampSt. Johns RiverPublic
- Fulton Road Unimproved LandingSt. Johns RiverPublic
- Harbor View Public Boat RampRibault RiverPublic
- T. K. Stokes Public Boat RampRibault RiverPublic
- Bert Maxwell Boat RampSt. Johns River - Trout RiverPublic
- Palms Fish Camp Public RampSt. Johns River - Clapboard CreekPublic
- Clapboard Creek Fish CampSt. Johns River - Clapboard CreekPublic
Made to print
Put Saint Marys River on your wall
This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Saint Marys River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
