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Surface Water Data Portal

Readings as of July 28, 2026 at 4:53 PM PT · not current conditions

Reservoirs

Guadalupe Reservoir

Holding 1,296 acre-feet, which is 38.0 percent of its published capacity of 3,415 acre-feet.

Guadalupe Reservoir plotted at latitude 37.1987 and longitude -121.8790 over Valley Water's published major-watershed layer.
Guadalupe Reservoir at 37.1987, -121.8790, exactly as positioned in Valley Water's sensor feed. Valley Water publishes Guadalupe River as a major watershed here. The eleven published boundaries do not line up exactly with the five watershed groupings used here, and not every named creek has one.
  • Reservoir

38.0%

  • Storage 1,296 acre-feet
  • Water surface elevation 582.3 ft
  • Spills at 617.3 ft
  • Guadalupe watershed
  • Captured July 28, 2026 at 4:30 PM PT

Reservoir Notes

Elevation data is in 'local' datum, which is similar, but not exactly, in NGVD29 datum. To convert the local datum to NAVD88, add 1.62'.

Valley Water, sensor notes for Guadalupe Reservoir

Gauges Below This Reservoir

  1. Guadalupe Creek below Guadalupe Reservoir

    1.48 ft · 2.12 cfs · no published threshold