Napa River
River in California, read from 2 USGS gauges, draining about 218 square miles. Figures refresh every fifteen minutes.
Discharge
no flow
· 9 min ago
Normal for today
0.5
cfs median, 67 yrs
Water temp
—
not measured here
Gage height
1.98
ft
Gauges on this water
Reading by reach
Reading the number
On this date the gauge has averaged 0.5 cfs over 67 years of record, with the middle half of years falling between 0.0 and 2.2 cfs. Today sits inside that band, which is as close to a normal October day as the gauge can tell you.
Regional hatch calendar
What is likely hatching near Napa River
Napa River does not have its own verified chart yet. This calendar is combined from the verified charts on Yuba River (68 mi), Sacramento River (144 mi), Truckee River (145 mi). Treat it as regional timing, and file a report if you see something different here.
| Insect | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blue-Winged Olive | January: peak | February: peak | March: peak | April: peak | May: active | June: absent | July: absent | August: absent | September: active | October: peak | November: peak | December: peak |
| Caddis | January: absent | February: absent | March: active | April: peak | May: peak | June: peak | July: peak | August: peak | September: peak | October: active | November: active | December: absent |
| Golden Stonefly | January: absent | February: absent | March: absent | April: absent | May: active | June: peak | July: peak | August: active | September: absent | October: absent | November: absent | December: absent |
| Midge | January: peak | February: peak | March: peak | April: peak | May: active | June: active | July: active | August: active | September: active | October: peak | November: peak | December: peak |
| Pale Morning Dun | January: absent | February: absent | March: active | April: active | May: peak | June: peak | July: peak | August: peak | September: active | October: active | November: active | December: active |
| Green Drake | January: absent | February: absent | March: absent | April: absent | May: active | June: peak | July: active | August: absent | September: absent | October: absent | November: absent | December: absent |
| Little Black Stonefly | January: active | February: peak | March: peak | April: active | May: absent | June: absent | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| March Brown | January: absent | February: active | March: peak | April: peak | May: absent | June: absent | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| Skwala | January: absent | February: absent | March: active | April: peak | May: active | June: absent | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| Terrestrials | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: peak | September: active | October: absent | November: absent | December: absent |
Reports
From anglers on Napa River
No reports filed here yet. The first one becomes the page’s local knowledge, stamped with the flow at the time. File a report.