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LakeMonster.com is a BETA data site created to help lake enthusiasts of all kinds by combining the latest satellite imagery, weather data, lake staff information, and community member reports to communicate current lake conditions.
Check the map below for point temperatures. Drought conditions and low water levels are affecting smaller lake temperature accuracy. We are working to resolve the issue. Please help others by submitting your observed temperatures.

Lake Merwin , WA
GPS: 45.989, -122.475 Google Map · LakeMonster Map
Views: 1419
Favorited: 1
~ 2309 miles away - (519)
Today's Forecast Dec 01, 2021
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Lake Merwin's current water temperature is 44°F. Today's forecast is: Partly cloudy throughout the day., with a high around 59°F and a low around 47°F. Winds are out of the ESE at 3 mph with gusts of 7 mph.

Current Conditions
44°F
Water estimate as of
Nov 29, 2021
59° 47° F
Air
NNE 3 - 7 gust
Wind
Temps are estimates of the surface temp acquired throughout the lake. Values are generally within a few degrees, but may be inaccurate due to factors including cloud cover, land interference, water levels, and input data quality/accuracy. If a temp is inaccurate, please contact us. Consider helping us improve our accuracy by creating an account and submitting your observed water temps in the section below.


Community Water Temps
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   Your
   Temperature

Latest satelite temp: 44°F
44°F
  Warning: Greater than 10% difference.




Forecast as of Dec 01, 2021
gust  
5  
6+  
11+  
16+  
21+
Wednesday
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59° 47°
ESE 3-7 mph
6
8
10

Partly cloudy throughout the day.
Thursday
image
50° 36°
NW 4-12 mph
6
8
10
12
2
4
6
8

Mostly cloudy throughout the day.
Friday
image
50° 40°
ENE 4-7 mph
6
8
10
12
2
4
6
8

Possible light rain overnight.
Saturday
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47° 32°
SW 3-10 mph
6
8
10
12
2
4
6
8

Rain in the morning and afternoon.
Sunday
image
46° 39°
E 2-8 mph
6
8
10
12
2
4
6
8

Rain overnight.
Monday
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51° 44°
SSW 5-45 mph
6
8
10
12
2
4
6
8

Rain throughout the day.
Tuesday
image
47° 42°
SW 2-15 mph
6
8
10
12
2
4
6
8

Light rain throughout the day.
Wednesday
image
47° 38°
S 3-21 mph
6
8
10
12
2
4

Rain throughout the day.

Latest Satellite Imagery
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Description
Merwin Reservoir was formed after the completion of Merwin Dam, in 1931 by the Inland Power and Light Company. The reservoir fluctuates depending on the amount of run-off making boat access difficult at times. Kokanee are the main target, however, Tiger Muskie planted in 1995 are also popular with anglers. This North Fork Lewis River impoundment located near the town of Ariel, on the south side of Highway SR"503, is shared by Clark and Cowlitz counties.

Related sites:
en.wikipedia.org
wdfw.wa.gov

Attributes
Acres 3,840
Base Elevation 285 Ft

Pressure
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Recent Water Temperatures
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Nearby Lakes
Water: 40° H: 58° L: 45°
Wind 3-7 mph
Yale Lake Partly cloudy throughout the day. 13 miles from Lake Merwin Yale, WA
Water: 0° H: 56° L: 45°
Wind 3-8 mph
Merrill Lake Partly cloudy throughout the day. 17 miles from Lake Merwin Cougar, WA
Water: 41° H: 57° L: 45°
Wind 3-8 mph
Swift Reservoir Partly cloudy throughout the day. 23 miles from Lake Merwin Cougar, WA
Water: 0° H: 57° L: 45°
Wind 3-9 mph
Horseshoe Lake (Woodland) Mostly cloudy throughout the day. 23 miles from Lake Merwin Woodland, WA
Water: 43° H: 57° L: 47°
Wind 3-8 mph
Coldwater Lake Partly cloudy throughout the day. 37 miles from Lake Merwin Na, WA
Water: 45° H: 60° L: 47°
Wind 2-6 mph
Vancouver Lake Partly cloudy throughout the day. 40 miles from Lake Merwin Vancouver, WA
Water: 0° H: 57° L: 47°
Wind 4-10 mph
Lake Sacajawea Mostly cloudy throughout the day. 40 miles from Lake Merwin Longview, WA
Water: 38° H: 53° L: 43°
Wind 4-11 mph
Spirit Lake Partly cloudy throughout the day. 40 miles from Lake Merwin Mount St. Helens, WA
Water: 36° H: 57° L: 47°
Wind 5-12 mph
Silver Lake Mostly cloudy throughout the day. 42 miles from Lake Merwin Silver Lake, WA
Water: 36° H: 61° L: 47°
Wind 3-6 mph
Lacamas Lake Partly cloudy throughout the day. 43 miles from Lake Merwin Camas, WA
Water: 64° H: 59° L: 49°
Wind 4-9 mph
Riffe Lake Partly cloudy throughout the day. 60 miles from Lake Merwin Morton, WA
Water: 46° H: 58° L: 49°
Wind 4-10 mph
Mayfield Lake Mostly cloudy throughout the day. 61 miles from Lake Merwin Mossyrock, WA
Water: 42° H: 58° L: 44°
Wind 2-4 mph
Hagg Lake Mostly cloudy throughout the day. 80 miles from Lake Merwin Gaston, OR
Water: 42° H: 59° L: 44°
Wind 2-4 mph
Henry Hagg Lake Mostly cloudy throughout the day. 81 miles from Lake Merwin Gaston, OR
Water: 0° H: 56° L: 49°
Wind 4-11 mph
Mineral Lake Possible light rain overnight. 84 miles from Lake Merwin Mineral, WA
Water: 37° H: 57° L: 50°
Wind 5-15 mph
Alder Lake Possible light rain overnight. 91 miles from Lake Merwin Eatonville, WA
Water: 39° H: 56° L: 45°
Wind 3-6 mph
Barney Reservoir Mostly cloudy throughout the day. 93 miles from Lake Merwin Hillsboro, OR
Water: 38° H: 57° L: 52°
Wind 7-21 mph
Lake Lawrence Mostly cloudy throughout the day. 96 miles from Lake Merwin Yelm, WA
Water: 42° H: 53° L: 44°
Wind 7-18 mph
Packwood Lake Mostly cloudy throughout the day. 97 miles from Lake Merwin Packwood, WA
Water: 36° H: 58° L: 52°
Wind 7-19 mph
Harts Lake Mostly cloudy throughout the day. 101 miles from Lake Merwin Harts Lake, WA