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Surface Water Data Portal

Demo snapshot · July 28, 2026 at 4:53 PM PT · not current conditions

Watershed

Guadalupe

The Guadalupe River gathers Los Gatos, Guadalupe, Alamitos and Calero creeks out of the Santa Cruz Mountains and carries them straight through downtown San Jose to the Bay.

35 stream gauges · 11 rain gauges · 5 reservoirs · drains to San Francisco Bay

Guadalupe portal-group sensors plotted at their published coordinates over Valley Water's major-watershed polygons.
35 stream, 11 rain, and 5 reservoir sensors assigned to the Guadalupe portal group, plotted at their issued coordinates. Guadalupe River is the published polygon whose name matches this portal group. The eleven published polygons do not exactly match the portal's five sensor groups and do not provide a boundary for every named creek.
  • Stream gauge
  • Rain gauge
  • Reservoir
  1. San Francisquito
  2. Adobe
  3. Permanente
  4. Sunnyvale West
  5. Sunnyvale East
  6. Calabazas
  7. San Tomas
  8. Guadalupe River
  9. Coyote
  10. Uvas
  11. Llagas

Reservoirs Above This Watershed

Water released or spilled from these reservoirs arrives at the gauges below.

Reservoirs in the Guadalupe watershed
ReservoirStorageElevationSpills at
Almaden Reservoir1,093 acre-feet599.5 ft608.6 ft
Calero Reservoir3,974 acre-feet461.9 ft483.5 ft
Guadalupe Reservoir1,296 acre-feet582.3 ft617.3 ft
Lexington Reservoir11,408 acre-feet630.2 ft649.9 ft
Vasona Reservoir440 acre-feet294.4 ft294.8 ft

Ridge to Bay

Each creek is drawn top to bottom in the order the water runs. The bar beside each gauge is filled to its captured stage on that gauge's own local scale; the dashed rules across it are the flood thresholds Valley Water publishes for that location.

Los Gatos Creek

8 gauges, ordered south to north down the creek

  1. Los Gatos Creek above Ryland Dam

    5.33 ft · 2.17 cfs · no published threshold

  2. Los Gatos Creek above Lexington Reservoir

    0.00 ft · 0 cfs · no published threshold

  3. Los Gatos Creek below Lexington Reservoir (Low Flow)

    2.18 ft · 0 cfs · no published threshold

  4. Los Gatos Creek below CA-9

    2.54 ft · 20 cfs · 4.96 ft below threshold 1

  5. Los Gatos Creek at Lark Ave

    1.51 ft · 20.77 cfs · 2.49 ft below threshold 1

  6. Los Gatos Creek at Kirk Dam Pond (Stage Only)

    9.32 ft · 0 cfs · no published threshold

  7. Los Gatos Creek below Kirk Dam

    1.19 ft · 6.65 cfs · no published threshold

  8. Los Gatos Creek at Lincoln Ave

    4.95 ft · 4.02 cfs · 5.05 ft below threshold 1

Guadalupe River

6 gauges, ordered south to north down the creek

  1. Guadalupe River at Alamitos Fish Ladder

    1.60 ft · 5.8 cfs · no published threshold

  2. Guadalupe River above Almaden Expwy

    2.34 ft · 1.86 cfs · 6.66 ft below threshold 1

  3. Guadalupe River at Alma Ave (Stage Only)

    3.12 ft · 0 cfs · 11.38 ft below threshold 1

  4. Guadalupe River at US-101 (USGS)

    5.12 ft · 27.5 cfs · 11.88 ft below threshold 1

  5. Guadalupe River at Montague Expwy (Stage Only)

    10.44 ft · 0 cfs · no published threshold

  6. Guadalupe River at Gold St (Stage Only)

    4.76 ft · 0 cfs · no published threshold

Alamitos Creek

2 gauges, ordered south to north down the creek

  1. Alamitos Creek below Almaden Reservoir

    1.97 ft · 3.5 cfs · no published threshold

  2. Alamitos Creek at Graystone Ln

    1.56 ft · 2.18 cfs · no published threshold

Almaden-Calero Canal

2 gauges, ordered south to north down the creek

  1. Almaden-Calero Canal at Almaden Reservoir

    0.53 ft · 0 cfs · no published threshold

  2. Almaden-Calero Canal at Calero Reservoir

    -0.07 ft · 0 cfs · no published threshold

Calero Creek

2 gauges, too close together to order along the creek

  1. Calero Creek above Calero Reservoir

    3.67 ft · 0 cfs · no published threshold

  2. Calero Creek below Calero Reservoir

    1.39 ft · 0.8 cfs · 2.41 ft below threshold 1

Canoas Creek

2 gauges, too close together to order along the creek

  1. Canoas Creek at Dow

    1.47 ft · 0.67 cfs · no published threshold

  2. Canoas Creek at Almaden Expwy (Stage Only)

    1.28 ft · 0 cfs · 8.22 ft below threshold 1

Guadalupe Creek

2 gauges, ordered south to north down the creek

  1. Guadalupe Creek above Guadalupe Reservoir

    2.35 ft · 0.48 cfs · no published threshold

  2. Guadalupe Creek below Guadalupe Reservoir

    1.48 ft · 2.12 cfs · no published threshold

Kirk Ditch

2 gauges, too close together to order along the creek

  1. Kirk Ditch at Headwaters

    2.45 ft · 12.48 cfs · no published threshold

  2. Kirk Ditch at CA-17 (Not Real-Time)

    0.00 ft · 0 cfs · no published threshold

Ross Creek

2 gauges, ordered south to north down the creek

  1. Ross Creek at Blossom Hill Rd

    1.08 ft · 0.04 cfs · no published threshold

  2. Ross Creek at Cherry Ave

    2.53 ft · 0 cfs · 4.97 ft below threshold 1

Other Gauges Here

Rain Gauges Here

Rain gauges in the Guadalupe watershed
GaugeLast hourLast 24 hoursSeason
Alamitos0.00 in0.00 in15.91 in
Almaden Watershed0.00 in0.00 in33.39 in
Guadalupe Slough0.00 in0.00 in12.05 in
Johnson Ranch0.00 in0.00 in24.88 in
Mt Umunhum0.00 in0.00 in49.53 in
Rinconada WTP0.00 in0.00 in21.69 in
Guadalupe Watershed0.00 in0.00 in38.11 in
Vasona Pump Station0.00 in0.00 in19.02 in
Calero Watershed0.00 in0.00 in20.08 in
Church Ave Perc Ponds0.00 in0.00 in16.54 in
Lexington Reservoir (Banjo Point)0.00 in0.00 in34.92 in