Lake San Antonio reservoir
Lake San Antonio
Lake San Antonio is a reservoir located in Monterey County, California. The lake was created in 1965 by the construction of the San Antonio Dam on the San Antonio River. The dam was built primarily for water storage and flood control purposes. The lake's hydrology is primarily fed by the San Antonio River, which is sourced by the Nacimiento River and the San Antonio Creek. The lake's water levels are influenced by snowpack from the surrounding mountains, as well as surface flows from the river and creek. The lake is used for both agricultural purposes and recreation, including boating, fishing, and camping. The lake has also been used for water supply for nearby communities.
Daily levels at Lake San Antonio
Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.
Storage
acre-ft · code 2
Pool Elevation
ft · code 1
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
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. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Lake San Antonio -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Nacimiento R Bl Nacimiento Dam Nr Bradley Ca | 261 cfs | → |
| Salinas R Nr Bradley Ca | 359 cfs | → |
| Nacimiento R Bl Sapaque C Nr Bryson Ca | 5 cfs | → |
| San Antonio R Nr Lockwood Ca | · | → |
| Estrella R Nr Estrella Ca | 0 cfs | → |
| Salinas R A Paso Robles Ca | 3 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake San Antonio.
Boat launches
- Resort Drive San Luis Obispo County
- Resort Drive, Paso Robles
- Lynch Road, Bradley
- Village Road San Luis Obispo County
- New Pleyto Road, Bradley
- Saddle Way San Luis Obispo County
Campgrounds
- Lake Nacimiento
- Eagles Ridge Campground
- Pine Knoll Campground
- Oak Knoll Campground
- South Shore San Antonio
- Quails Roost Campground
Fishing spots
- Lake San Antonio
- Nacimiento Lake
- Lake Nacimiento
- Barney Schwartz Park Lake
- Franklin Hot Springs
- Whale Rock Reservoir
Paddle runs
Track Lake San Antonio in the Snoflo app
Save this reservoir as a favorite and set push alerts when storage crosses a threshold (e.g. "alert me at 80% of normal").
About Lake San Antonio
Where does the data for Lake San Antonio come from?
Daily storage, pool elevation, and release rates are sourced from USGS, USBR, and USACE monitoring stations. Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
Storage observations are updated daily by the operating agency. The 15-day weather forecast refreshes throughout the day. Snoflo caches and renders the most recent observation -- check the "as of" timestamp on the storage card.
What does the Hazard hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Lake San Antonio.