2026-10-24T09:00:00-07:00
* WHAT...Temperatures of 33 to 36 degrees will result in frost formation. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...From 11 PM Friday to 9 AM PDT Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Willamette River At Portland, Or Realtime Data
Until 2026-10-23T00:00:00-07:00 • National Weather Service
* WHAT...Temperatures of 33 to 36 degrees will result in frost formation. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...From 11 PM Friday to 9 AM PDT Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
WILLAMETTE RIVER AT PORTLAND, OR
Realtime Data • Report • Conditions
7,690
Discharge (cfs)
1.7
Gauge Height (ft)
Streamflow discharge was last observed at 7,690 cfs, and a gauge height of 1.73 feet.
With the
% decrease since yesterday,
the streamflow average over the past 10 days is 14,269 .
Weather today, Tomorrow,
The main constituents of the river are water and sediment, with occasional pollutants from industrial and agricultural activities. The river is fed by several tributaries, including the Clackamas and Tualatin Rivers. The presence of dams, such as the Bonneville Dam, can affect the flow rate and water temperature. Seasonal trends show higher flows during the winter and lower flows during the summer months. Interestingly, the Willamette River is home to several species of fish, including salmon and steelhead, and is a popular spot for recreational activities such as kayaking and swimming.
October 22, 2026
| Elevation | 10.0 ft |
| Last Updated | |
| Mean water velocity for discharge computation, feet per second | -0.13 ft/sec |
| Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 ±2.5°, formazin nephelometric units (FNU) | 1.0 FNU |
| Gage height, ft | 1.73 ft |
| Chlorophyll a, estimated, water, in-situ, in-vivo fluorescence (IVF), relative fluorescence units (RFU) | 0.49 RFU |
| Streamflow, ft³/s | 7690.0 ft3/s |
| Phycocyanins (cyanobacteria), water, in situ, IVF, IVFU | 0.13 IVFU |
| Depth of sensor below water surface, feet | 4.72 ft |
| Specific conductance, water, unfiltered, microsiemens per centimeter at 25°C | 96.0 uS/cm @25C |
| Dissolved oxygen, water, unfiltered, mg/L | 10.0 mg/l |
| Colored dissolved organic matter (CDOM), water, in situ, single band excitation, fluorescence emission, ppb QSE | 11.36 ug/l QSE |
| pH, water, unfiltered, field, standard units | 7.4 std units |
| Temperature, water, °C | 14.6 deg C |
| Chlorophylls, water, fluorometric, 650-700 nm, in situ sensor, micrograms per liter | 1.7 ug/l |
| Phycocyanins (cyanobacteria), water, in situ, fluorometric method, excitation at 590 ±15 nm, emission at 685 ±20 nm, relative fluorescence units (RFU) | 0.33 RFU |
| Lower 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter | 1.5 mg/l |
| Upper 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter | 4.0 mg/l |
| Suspended sediment load, water, unfiltered, computed, the product of regression-computed suspended sediment concentration and streamflow, tons per day | -30.0 tons/day |
| Nitrate, water, in situ, mg/L as N | 0.09 mg/l as N |
| Suspended sediment concentration, water, unfiltered, estimated by regression equation, mg/L | 2.4 mg/l |
| Streamflow, tidally filtered, ft³/s | 5780.0 ft3/s |
| Percent of Normal | 41% |
| Year Over Year Average | 19,150 cfs |
| 24hr Flow Prediction | cfs |
| Maximum Recorded | 167,000 cfs |
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