Wynoochee River Flow
As of 2026-08-05, the Wynoochee River is flowing at a combined 626 cfs across 3 USGS streamgauges — 100% of normal for this time of year, versus a seasonal average of 623 cfs.
Total streamflow across the Wynoochee River was last observed at 626 cfs, and is expected to yield approximately 1,242 acre-ft of water today; about 100% of normal. Average streamflow for this time of year is 623 cfs, with recent peaks last observed on 2025-12-17 when daily discharge volume was observed at 22,850 cfs.
Maximum discharge along the river is currently at the Wynoochee River Above Save Creek Near Aberdeen reporting a streamflow rate of 225 cfs. However, the streamgauge with the highest stage along the river is the Wynoochee River Above Black Creek Nr Montesano with a gauge stage of 27.04 ft. This river is monitored from 3 different streamgauging stations along the Wynoochee River, the highest being situated at an altitude of 632 ft, the Wynoochee River Near Grisdale.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Wynoochee River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Wynoochee River
All 3 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Wynoochee River Near Grisdale
WA
USGS 12035400
|
197 | 1.26 | · | 93% | 144 | 7,270 | 632 |
|
Wynoochee River Above Save Creek Near Aberdeen
WA
USGS 12036000
|
225 | 4.78 | · | 90% | 200 | 9,860 | 432 |
|
Wynoochee River Above Black Creek Nr Montesano
WA
USGS 12037400
|
192 | 27.04 | · | 92% | 100 | 14,100 | 44 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Wynoochee River
The Wynoochee River is a 42-mile-long river in western Washington, United States. It originates in the Olympic Mountains and flows northwest into Wynoochee Lake, which is created by the Wynoochee Dam. The river then continues west and eventually flows into the Chehalis River near Aberdeen. The Wynoochee River is primarily used for hydroelectric power generation, with the Wynoochee Dam being the main source of power. The reservoir created by the dam is also used for recreational activities such as fishing, camping, and boating. The river has a rich history, with the Wynoochee Dam being built in the 1970s to provide power to the growing population of western Washington. The river also supports various agricultural activities along its banks. Despite the dam's benefits, it has had negative impacts on the river's ecosystem, including a decline in fish populations.
Recreation along the Wynoochee River
Fishing access and paddle runs Snoflo tracks within the watershed.
Paddle runs
- Headwaters And Includes All Tributaries To Confluence With Quinault River
- Headwaters And Includes All Tributaries To Confluence With Graves Creek
- Headwaters To Southern Boundary Of Olympic National Park
- Headwaters And Includes All Tributaries Downstream From The End Of Graves Creek Road And Confluence With Graves Creek To Western Boundary Of Olympic National Park
- Headwaters- Includes All Tributaries To Confluence With North Fork Skokomish River
Track the Wynoochee River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Wynoochee River
How is the Wynoochee River flowing right now?
As of 2026-08-05, the Wynoochee River is flowing at a combined 626 cfs across its USGS streamgauges, about 100% of normal for this date. The live per-gauge breakdown and 24-hour trend are shown above.
Is the Wynoochee River running high or low right now?
Check the percent-of-normal figure on this page: above 100% means the river is running higher than its seasonal average for the date, below 100% means lower. The per-gauge table shows which reaches are highest and lowest.
Where does the data for the Wynoochee River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.