St. Johns River At Astor flow report
As of July 13, 2026, St. Johns River At Astor is flowing at 2,660 cfs with a gage height of 0.71 ft, receding 6% over the past 24 hours. Source: USGS gauge #02236125, refreshed throughout the day.
Historical Data
St. Johns River At Astor at a glance
How St. Johns River At Astor is running right now, where it sits on the map, and the key gauge stats.
St. Johns River At Astor is flowing at 2,660 cfs, with the water sitting 0.71 ft at the gage. Flow is down 6% since yesterday as the gauge recedes.
This is USGS gauge #02236125 in Florida. Over the past 10 days the average has been 2,405 cfs, peaking at 2,930 cfs.
Over the next 5 days, St. Johns River At Astor is expected to recede from today's 2660 cfs, toward roughly 2239 cfs by 2026-07-18 (likely range 1258-3985 cfs) -- running well below the seasonal normal.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Florida flow report.
Streamflow Forecast
Powered by PULSE — Snoflo’s Predictive Unified Learning & Simulation Engine, which learns from how this river has answered every past storm, snowmelt, and dry spell to forecast where it’s headed with a precision generic models can’t match.
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
St. Johns River At Astor
Johns River at Astor, FL streamgauge measures the flow of water in the river. The river is fed by numerous tributaries, including the Ocklawaha River, and its flow is affected by rainfall and tides. The river has several dams, including the Buckman Lock and Dam which was built for navigation purposes. Seasonally, the river experiences high flows during summer thunderstorms and hurricane season, while droughts can cause low flows. Interesting fact: the St. Johns River is one of the few rivers in the world that flows northward, and it is home to a diverse array of wildlife, including manatees and American alligators.
Nearby streamflow levels
Cross-check St. Johns River At Astor's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| St. Johns River At Astor | 2,660 cfs |
| St. Johns River Nr Deland | 2,870 cfs |
| Haw Creek Ab Russells Landing Nr St Johns Park Fl | 113 cfs |
| Blackwater Creek Near Cassia | 3 cfs |
| Ocklawaha R At Moss Bluff | 24 cfs |
| Wekiva River Nr Sanford | 161 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near St. Johns River At Astor. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Hastings 4ne | 0 in |
| St. Augustine 3.4 Sw | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of St. Johns River At Astor.
Boat launches
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River runs
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River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track St. Johns River At Astor in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when St. Johns River At Astor crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About St. Johns River At Astor
Where does the streamflow data for St. Johns River At Astor come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 02236125. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when St. Johns River At Astor rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free St. Johns River At Astor report
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