Miramar Reservoir
As of July 17, 2026, Miramar is holding 5,802 acre-ft of water. Storage data refreshed throughout the day.
Miramar
Miramar is a small coastal community located in California's San Mateo County, known for its scenic beauty and historic significance. The area's hydrology is influenced by the San Andreas Fault Zone, which runs through the region and has led to the creation of many natural springs and streams. These water sources provide important surface flow for the area, including the San Vicente Creek and the San Mateo Creek. Additionally, the nearby snowpack providers, such as the Sierra Nevada Mountains, contribute to the area's water supply. Many agricultural and recreational activities take place in the region, including farming, fishing, and outdoor sports like hiking and camping. The area's rich history and natural beauty continue to attract visitors from all over the world.
Daily levels at Miramar
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 Miramar -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Los Penasquitos C Nr Poway Ca | 0 cfs | → |
| San Diego R A Mast Rd Nr Santee Ca | 1 cfs | → |
| San Diego R A Fashion Valley At San Diego Ca | 2 cfs | → |
| Los Coches C Nr Lakeside Ca | 0 cfs | → |
| Santa Maria C Nr Ramona Ca | · | → |
| Sweetwater R A Dehesa Ca | · | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Miramar.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Miramar
Where does the data for Miramar 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 below 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.