Columbia Slough at Portland water level

Name: Columbia Slough at Portland water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Tidal gauge, Columbia Slough, Oregon, United States

Directions

Normal for mid-October

Water level

0.47ft Down 0.43 ft over the last 24 hours

Measured Oct 20, 2026, 10:20 AM PDT (1 hour ago)

Flow: 158 cfs

History

7 days

Water level

What this means

The gauge at Columbia Slough at Portland reads 0.47 ft, a normal level for mid-October.

The level is falling, down 0.43 ft over the past 24 hours. Over the past 30 days it has moved between 0.47 ft and 4.08 ft.

Compared with 5 years of daily readings for this time of year. How to read levels

Weather at the gauge

No rain in the last 3 days.

20 Tue 70° 47° – Wind 7 mph

21 Wed 72° 48° – Wind 5 mph

22 Thu 67° 45° – Wind 10 mph

23 Fri 63° 41° – Wind 5 mph

24 Sat 65° 38° – Wind 7 mph

25 Sun 69° 40° – Wind 5 mph

26 Mon 68° 42° – Wind 5 mph

Forecast: Open-Meteo

Sunrise 07:35 AM Sunset 06:18 PM Daylight 10 hr, 43 min Waxing gibbous 70%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Columbia River at VancouverTidal gauge, Columbia River	−0.11 ft	Very low	−1.46 ft	4.5 mi
Willamette River at PortlandTidal gauge, Willamette River	0.22 ft	Below flood stage	−1.70 ft	10 mi
Fanno Creek at 56th Ave, at PortlandRiver gauge, Fanno Creek	8.36 ft	Below flood stage	+0.02 ft	11 mi
Crystal Springs Creek at Bybee St, PortlandRiver gauge, Crystal Springs Creek	14.5 cfs	Normal	+0.4 cfs	13 mi
Johnson Creek at MilwaukieRiver gauge, Johnson Creek	23.75 ft	Below flood stage	−0.01 ft	14 mi
Tualatin River at Highway 219 near HillsboroRiver gauge, Tualatin River	116 cfs	Low	−6.0 cfs	15 mi
Tryon Creek near Lake OswegoRiver gauge, Tryon Creek	0.4 cfs	Very low	±0	15 mi
Ef Dairy Creek above Murtaugh Creek near Meacham CornerRiver gauge, Ef Dairy Creek	7.1 cfs	Very low	±0	15 mi

Questions and answers

What is the water level of Columbia Slough at Portland today?

On Oct 20, 2026, 10:20 AM PDT, the water level was 0.47 ft. Down 0.43 ft over the last 24 hours.

Is Columbia Slough at Portland rising or falling?

Down 0.43 ft over the last 24 hours.

Is the level of Columbia Slough at Portland normal?

Normal for mid-October. Compared with 5 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:14211820 (Agency page)
Coordinates: 45.63901, -122.76315 (WGS84)
Vertical datum: NGVD29
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	0.47 ft	2026-10-20 17:20	Provisional
Flow	158 cfs	2026-10-20 17:20	Provisional

Download

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How to cite

U.S. Geological Survey: Columbia Slough at Portland (usgs:14211820). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/oregon/columbia-slough-at-portland

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer