St. John River
River in Maine, read from 3 USGS gauges, draining about 5,929 square miles. Figures refresh every fifteen minutes.
Discharge
773
cfs · 1h ago
Normal for today
4,410
cfs median, 100 yrs
Water temp
—
not measured here
Gage height
3.32
ft
Gauges on this water
Reading by reach
Reading the number
On this date the gauge has averaged 4,410 cfs over 100 years of record, with the middle half of years falling between 2,280 and 8,430 cfs. Today is below that band: lower, clearer and, in summer, warmer water than a typical October day here.
Regional hatch calendar
What is likely hatching near St. John River
St. John River does not have its own verified chart yet. This calendar is combined from the verified charts on Penobscot River (113 mi), Connecticut River (142 mi), Androscoggin River (149 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: absent | February: absent | March: absent | April: peak | May: peak | June: active | July: active | August: active | September: peak | October: peak | November: absent | December: absent |
| Caddis | January: absent | February: absent | March: absent | April: active | May: active | June: peak | July: peak | August: active | September: active | October: active | November: absent | December: absent |
| Hendrickson | January: absent | February: absent | March: absent | April: absent | May: peak | June: peak | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| March Brown | January: absent | February: absent | March: absent | April: absent | May: peak | June: peak | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| Terrestrials | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: active | August: peak | September: active | October: absent | November: absent | December: absent |
| Brown Drake | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: absent | September: absent | October: absent | November: absent | December: absent |
| Golden Stonefly | January: absent | February: absent | March: absent | April: absent | May: absent | June: peak | July: peak | August: absent | September: absent | October: absent | November: absent | December: absent |
| Light Cahill | January: absent | February: absent | March: absent | April: absent | May: absent | June: peak | July: peak | August: active | September: absent | October: absent | November: absent | December: absent |
| Alder Fly | January: absent | February: absent | March: absent | April: absent | May: absent | June: peak | July: active | August: absent | September: absent | October: absent | November: absent | December: absent |
| Green Drake | January: absent | February: absent | March: absent | April: absent | May: absent | June: peak | July: active | August: absent | September: absent | October: absent | November: absent | December: absent |
| Isonychia | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: absent | August: active | September: peak | October: active | November: absent | December: absent |
| Little Black Stonefly | January: absent | February: absent | March: active | April: peak | May: active | June: absent | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
Reports
From anglers on St. John 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.