Lake levels › Washington

Lake Merwin water level today

Lower than usual for this time of year

230.00ft

feet above sea level ·

vs normal for Oct 10−5.3 ft
24 hours±0.00 ft
7 days+0.2 ft
30 days−3.0 ft
vs a year ago±0.0 ft

Is Lake Merwin low right now?

Lake Merwin was at 230.00 ft on October 10, 2026. That is 5.35 ft below the typical level for October 10 — lower than in 9 of 10 past years. Over the past week the lake has been rising about 0.03 ft a day.

Last 12 monthsDaily level Normal range (10–90% of past years)
221226230235240NovDecJanFebMarAprMayJunJulAugSepOct

Lake Merwin on Oct 10 in past years

2025230.0±0.0
2024236.0−6.0
2023237.0−7.0
2022238.0−8.0
2021235.0−5.0
2020237.2−7.2

Level on the same date each year, and how today compares.

Daily levels, last two weeks

DateLevel (ft)Change
Oct 10230.00±0.00
Oct 9230.00±0.00
Oct 8230.00±0.00
Oct 7230.00±0.00
Oct 6230.00±0.00
Oct 5230.00±0.00
Oct 4230.00+0.21
Oct 3229.79+0.29
Oct 2229.50+0.21
Oct 1229.29+0.29
Sep 30229.00−0.04
Sep 29229.04−0.09
Sep 28229.13+0.09
Sep 27229.04+0.04

Daily means of the operator's readings (midnight to midnight, local time).

About Lake Merwin

10-year range
218.5 ft (January 24, 2022) to 239.4 ft (April 19, 2019)
Data
U.S. Geological Survey — USGS 14219950
Datum
NGVD29

Lakes near Lake Merwin

Questions

Is Lake Merwin low right now?

Lake Merwin was at 230.00 ft on October 10, 2026. That is 5.35 ft below the typical level for October 10 — lower than in 9 of 10 past years. Over the past week the lake has been rising about 0.03 ft a day.

How often is the Lake Merwin level updated?

The operator reports every 15 minutes to an hour. This page refreshes several times a day; the time of the latest reading is shown next to the level.

Where does this data come from?

U.S. Geological Survey (USGS 14219950). Readings are provisional and can be revised.