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Belmont, CA · San Mateo County
Right Now
Clear
Water
63°
Wind
10 mph
WSW
Gusts
15 mph
Pressure
29.80
steady
Forecast - Fri, Jun 12
High / Low
78° / 56°
Wind
6 mph
gusts 17 mph
Precip
0%
UV
10
Sunrise
12:47 PM
Sunset
3:31 AM
Today Read
Upper Crystal Springs ReservoirWind read
Calm
6 mph avg
Water read
63°
Cool-water mix
Air range
56° / 78°
today
Precip
0%
low concern
Today's forecast for Upper Crystal Springs Reservoir has calm wind, 56F to 78F air temperatures, 0% chance of precipitation, and 63F water.
Turn Upper Crystal Springs Reservoir's live water temp, forecast, solunar timing, and fish data into a plan for today — what to throw, when to go, and when to move.
Fishing Forecast
waning crescent
Major
5:10 PM - 7:40 PM
Minor
9:48 AM - 11:18 AM
Detailed temperature readings across your lake.
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Fish Species
5Water Temperature History
Current
63°
Jun 21
Low
45°
Feb 16
Average
61°
Last 12 Months
Warmest avg: July (67°F)
Coolest avg: February (51°F)
Rapid warming: February → March (+9°F)
Sharpest cooling: October → November (-11°F)
Wind speed, gusts, and pressure trends for trip timing.
Swipe days or tap points
7am - 6am
Peak Wind
12 mph
1am
Peak Gust
17 mph
highest gust
Pressure
29.84 inHg
rising
Visibility
10 mi
18% clouds
Tap chart for details, swipe left or right for different days.Tap chart for details • Swipe for different days
Pressure stability helps plan windows
Tap chart points for pressure details
Nearby Lakes
Fishing Forecast
2/5waning crescent
Water at 63°F -- good for cool-water species.
Fish Species
5Nearby Lakes
FAQ
Upper Crystal Springs Reservoir covers 592.80 acres (0.93 square miles) with a maximum depth of 9.77 meters (~32 feet).
Upper Crystal Springs Reservoir is located in Belmont, San Mateo County, CA. It is accessible to the public for outdoor activities.