Swift Reservoir 3.2 Mi East of Dam near Cougar water level

Name: Swift Reservoir 3.2 Mi East of Dam near Cougar water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Reservoir, Swift Reservoir 3.2 Mi East of Dam, Washington, United States

Directions

Normal for mid-October

Surface elevation

957.00ft Steady over the last 24 hours

Measured Oct 20, 2026, 09:00 PM PDT (2 hours ago)

History

What this means

Swift Reservoir 3.2 Mi East of Dam near Cougar is at 957.00 ft, in the normal range for mid-October.

The median for mid-October is 961.00 ft, based on 6 years of readings, so the lake level is 4.00 ft below typical. On the same day last year the reading was 961.00 ft, a difference of −4.00 ft.

It has barely moved over the past 24 hours. In the last month it has stayed between 957.00 ft and 968.00 ft.

Many reservoirs are drawn down through summer and fall; most of the refill comes later, with winter rain or spring snowmelt.

Compared with 6 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 961.00 ft4.00 ft below the median for this date
Normal for this date: 952.00 ft – 977.00 ft8 years in 10 fall in this range (6 years of records)
Same day last year: 961.00 ft−4.00 ft
Lowest and highest in 30 days: 957.00 ft – 968.00 ft
Lowest and highest in 12 months: 957.13 ft – 999.00 ft

On the water at Swift Reservoir 3.2 Mi East of Dam near Cougar

Normal levels mean few surprises on the water: ramps in use and the shoreline where you expect it.

Wear a life jacket on the water. Most boating deaths involve people who were not wearing one.

Weather at the gauge

Rain in the last 3 days: 0.03 in.

20 Tue 71° 49° – Wind 9 mph

21 Wed 77° 55° – Wind 7 mph

22 Thu 63° 42° – Wind 9 mph

23 Fri 59° 40° – Wind 5 mph

24 Sat 68° 40° – Wind 5 mph

25 Sun 68° 45° – Wind 5 mph

26 Mon 69° 46° – Wind 5 mph

Forecast: Open-Meteo

Sunrise 07:34 AM Sunset 06:13 PM Daylight 10 hr, 39 min Waxing gibbous 74%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Muddy River below Clear Creek near CougarRiver gauge, Muddy River	13.75 ft	Very low	±0	6 mi
Lewis River above Muddy River near CougarRiver gauge, Lewis River	161 cfs	Very low	−3.0 cfs	7 mi
Yale Reservoir near CougarReservoir, Yale Reservoir	474.00 ft	Normal	+1.00 ft	9 mi
Speelyai Creek near CougarRiver gauge, Speelyai Creek	1.3 cfs	Very low	±0	11 mi
Canyon Creek near AmboyRiver gauge, Canyon Creek	21.3 cfs	Low	±0	12 mi
Lake Merwin near ChelatchieLake, Lake Merwin	228.00 ft	Very low	−1.00 ft	14 mi
Lewis River at ArielRiver gauge, Lewis River	2.45 ft	Very low	−0.02 ft	22 mi
East Fork Lewis River near HeissonRiver gauge, East Fork Lewis River	10.03 ft	Very low	−0.02 ft	22 mi

Questions and answers

Is Swift Reservoir 3.2 Mi East of Dam near Cougar higher than last year?

No, it is 4.00 ft lower than on the same day last year, when the reading was 961.00 ft.

What is a normal level for Swift Reservoir 3.2 Mi East of Dam near Cougar in mid-October?

The median for mid-October is 961.00 ft. In 8 years out of 10 the reading falls between 952.00 ft and 977.00 ft, based on 6 years of records.

Is Swift Reservoir 3.2 Mi East of Dam near Cougar really 957.00 ft deep?

No. 957.00 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Swift Reservoir 3.2 Mi East of Dam near Cougar today?

On Oct 20, 2026, 09:00 PM PDT, the surface elevation was 957.00 ft. Steady over the last 24 hours.

Is Swift Reservoir 3.2 Mi East of Dam near Cougar rising or falling?

Steady over the last 24 hours. Down 4.00 ft over the last 7 days.

Is the level of Swift Reservoir 3.2 Mi East of Dam near Cougar normal?

Normal for mid-October. Compared with 6 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.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:14217599 (Agency page)
Coordinates: 46.06261, -122.13231 (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
Surface elevation	957.00 ft	2026-10-21 04:00	Provisional

Download

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How to cite

U.S. Geological Survey: Swift Reservoir 3.2 Mi East of Dam near Cougar (usgs:14217599). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/washington/swift-reservoir-3-2-mi-east-of-dam-near-cougar

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