4 USGS Streamgages
Nehalem River flows and levels
Nehalem River is gauged at 4 USGS streamgages in Oregon, each tracked by Rivermatics. The mainstem runs about 124 miles (200 km) from headwaters to outlet. Drainage area at the gauges ranges from 70 square miles at Nehalem River near Vernonia, OR up to 838 at Nehalem River at Nehalem, OR. Rivermatics issues a daily machine-learned 14-day flow outlook for every one of them.
Gauges on this river, upstream to downstream
Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.
| Gauge | State | Drainage sq mi | Elevation ft | April p50 cfs | July p50 cfs | Forecast |
|---|---|---|---|---|---|---|
| Nehalem River near Vernonia, OR | OR | 70 | — | 209.2 | 15.4 | 14-day |
| Nehalem River at Jewell, OR | OR | 412 | — | — | — | 14-day |
| Nehalem River near Foss, OR | OR | 667 | — | 2,119.7 | 238.1 | 14-day + temp |
| Nehalem River at Nehalem, OR | OR | 838 | — | — | — | 14-day |
Common questions
- How many gauges are on the Nehalem River?
- Rivermatics tracks 4 USGS streamgages on the Nehalem River, across Oregon. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
- Is there a flow forecast for the Nehalem River?
- Yes, at 4 of the 4 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on each gauge's live screen.
- Can I use Nehalem River data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.