Vallecito Lake forecast
Blended from several models, corrected to the lakeside station, and graded against it every day.
Low 90s through Sun, cooling to the low 80s by Wed. Afternoon storm chances Mon–Wed.
Hour by hour
See how much the models disagree — drag through the next 48 hours
The bold line is the corrected blend; the shaded band is how far the models disagree. Drag across it — or focus it and use .
Drag or use · the band is model spread, the line is the corrected blend.
Next seven days
Bars share one temperature scale, so you can read the week at a glance. Tap any day for the model spread, the correction, and the record.
ThuAug 6Cloudy90°60°1%
FriAug 7Sunny90°61°2%
SatAug 8Showers87°60°18%
SunAug 9Showers88°60°25%
MonAug 10Showers86°60°48%
TueAug 11Showers85°57°58%
WedAug 12Showers82°57°69%
Precipitation radar
The latest radar frame over the San Juans (RainViewer). Loads when you scroll here to keep the page light.
Radar RainViewer · base map CARTO/OpenStreetMap · data NOAA/NWS.
Lake vs. the high country
The lake sits at about 7,665 ft; Big Bear Park (station BBRC2) is up at 10,341 ft, ≈2,700 ft higher toward the Weminuche. The difference between them is the gradient that flat forecasts miss.
Why it differs from your phone
Most apps read one model and smooth the terrain flat. We pull several — NWS, GFS, ECMWF, ICON — pin them to the lake's real elevation, and blend them, then correct toward the marina's lakeside station. That's why it can disagree with your phone.
Sources: NWS · GFS · ECMWF · ICON. · Ground truth: the lakeside marina station. See how we verify.