Question 1

What is the current water temperature at Lake Merwin?

Accepted Answer

The current water temperature at Lake Merwin is 41°F as of Invalid date. This temperature reading is based on our advanced satellite monitoring system and real-time data collection. Water temperature is a crucial factor for fishing success and water activities.

Question 2

How often is the Lake Merwin water temperature updated?

Accepted Answer

Water temperature data for Lake Merwin is updated daily through our satellite monitoring system. The last update was made on Invalid date. We use advanced thermal imaging and surface monitoring technology to provide accurate, real-time temperature readings.

Question 3

What activities are suitable for the current water temperature at Lake Merwin?

Accepted Answer

With the current water temperature of 41°F at Lake Merwin, conditions are best for cold-water fishing and limited water activities. The temperature typically fluctuates 2-3 degrees throughout the day. This data is monitored via satellite and updated regularly to help you plan your lake activities.

Question 4

How good is the fishing at Lake Merwin with the current water temperature?

Accepted Answer

The current water temperature of 41°F at Lake Merwin is suitable for fishing, though fish activity may vary. For best results, fish during early morning or late evening hours when fish are most active. Always check local fishing regulations and licenses before fishing.

Question 5

What is Lake Merwin and what activities are available?

Accepted Answer

Looking for an outdoor adventure that includes fishing and boating? Look no further than Merwin Reservoir in Cowlitz County, Washington. This 3,840-acre body of water is formed by the impressive Merwin Dam, completed in 1931 by the Inland Power and Light Company. While the reservoir's water levels can fluctuate depending on runoff, it's still an excellent destination for anglers looking to reel in kokanee or the popular Tiger Muskie, planted in the waters back in 1995.

Whether you're an experienced angler or just starting out, Merwin Reservoir offers a unique fishing experience that's sure to be memorable. With its picturesque surroundings and abundant fish species, it's a perfect place to spend a relaxing day on the water. And even though boat access can be tricky at times due to fluctuating water levels, it's well worth the effort to enjoy the natural beauty of this North Fork Lewis River impoundment located near the town of Ariel, on the south side of Highway SR 503.

So, grab your fishing gear and head to Merwin Reservoir for an unforgettable day of fishing and outdoor fun in the heart of Cowlitz County, Washington. With its diverse fish species and stunning surroundings, it's a must-visit destination for any angler or outdoor enthusiast looking to experience the natural beauty of the Pacific Northwest.

Question 6

How big and deep is Lake Merwin?

Accepted Answer

Lake Merwin is a substantial body of water covering 3840.00 acres (6.00 square miles) with a maximum depth of 0.00 meters (0 feet). This size and depth make it ideal for various activities including and water recreation.

Question 7

What are the current conditions at Lake Merwin?

Accepted Answer

Current conditions at Lake Merwin as of April 30, 2025: 
      Water temperature is 41°F, 
      weather is MostlyClear, 
      and water clarity is typical for the season. 
      These conditions are regularly updated to help you plan your visit.

Question 8

When is the best time to fish at Lake Merwin?

Accepted Answer

The best fishing times at Lake Merwin vary by season:
      Spring (March-May): Spring fishing at the lake is excellent for Rainbow trout, Smallmouth bass, Largemouth bass, Brown bullhead. Focus on shallow areas warming up first, and use light tackle as fish become more active after winter.
      Summer (June-August): During summer months, fish are most active early morning and late evening. Look for Rainbow trout, Smallmouth bass, Largemouth bass, Brown bullhead in deeper, cooler waters during mid-day.
      Fall (September-November): Fall brings excellent fishing opportunities as Rainbow trout, Smallmouth bass, Largemouth bass, Brown bullhead feed heavily before winter. Focus on areas with falling water temperatures.
      Winter (December-February): Ice fishing is popular during winter months. Target Rainbow trout, Smallmouth bass, Largemouth bass, Brown bullhead in shallower bays and near structure, always ensuring safe ice conditions.
      Additionally, early morning and late evening typically offer the best fishing conditions.

Question 9

What facilities and access points are available at Lake Merwin?

Accepted Answer

Lake Merwin offers the following facilities and amenities:

Please note that some facilities may have seasonal hours or closures. Check current conditions and regulations before your visit.

Question 10

What types of fish can I catch at Lake Merwin?

Accepted Answer

Lake Merwin is home to Rainbow trout, Smallmouth bass, Largemouth bass, Brown bullhead. Each species has specific patterns and preferences that can help you plan your fishing trip effectively.

Question 11

What are the best techniques and times to catch Rainbow trout at Lake Merwin?

Accepted Answer

For Rainbow trout at Lake Merwin:
- Best seasons: Spring, Fall
- Active times: Morning, Late afternoon
- Preferred water temperature: 50-60°F
- Typical depth: 3-9 feet in spring, deeper in summer
- Habitat: Streams, Rivers, Lakes
- Spawning season: Spring

Recommended techniques:
- Fishing methods: Fly fishing, Spincasting
- Effective lures: Small spinners, Spoons, Fly patterns
- Natural bait options: Worms, Salmon eggs, Insects

Tackle recommendations:
- Rod: Ultralight to light power rod
- Reel: Spinning or fly reel
- Line: 2-6 lb test

Question 12

What are the best techniques and times to catch Smallmouth bass at Lake Merwin?

Accepted Answer

For Smallmouth bass at Lake Merwin:
- Best seasons: Spring, Fall
- Active times: Morning, Late Afternoon
- Preferred water temperature: 65-75°F
- Typical depth: Shallow in spring/fall, deeper in summer
- Habitat: Streams, Rivers, Lakes, Reservoirs
- Spawning season: Spring

Recommended techniques:
- Fishing methods: Drop shotting, Jigging, Casting
- Effective lures: Jigs, Tube baits, Soft plastics
- Natural bait options: Crayfish, Minnows, Worms

Tackle recommendations:
- Rod: Medium power rod
- Reel: Spinning reel
- Line: 6-15 lb test

Question 13

What are the best techniques and times to catch Largemouth bass at Lake Merwin?

Accepted Answer

For Largemouth bass at Lake Merwin:
- Best seasons: Spring, Fall
- Active times: Dawn, Dusk
- Preferred water temperature: 65-80°F
- Typical depth: Shallow in spring/fall, deeper in summer
- Habitat: Lakes, Ponds, Rivers, Reservoirs
- Spawning season: Late Spring

Recommended techniques:
- Fishing methods: Pitching and flipping, Trolling, Casting
- Effective lures: Plastic worms, Crankbaits, Spinnerbaits
- Natural bait options: Shiners, Frogs, Worms

Tackle recommendations:
- Rod: Medium-heavy power rod
- Reel: Baitcasting reel
- Line: 10-20 lb test

Question 14

What are the best techniques and times to catch Brown bullhead at Lake Merwin?

Accepted Answer

For Brown bullhead at Lake Merwin:
- Best seasons: Spring, Summer, Fall
- Active times: Night
- Preferred water temperature: 65-80°F
- Typical depth: 3-15 feet
- Habitat: Ponds, Lakes, Rivers
- Spawning season: Late Spring

Recommended techniques:
- Fishing methods: Bottom fishing
- Effective lures: Soft plastics
- Natural bait options: Worms, Cut bait

Tackle recommendations:
- Rod: Medium rod
- Reel: Spinning reel
- Line: 6-12 lb test

Question 15

What are the best fishing seasons at Lake Merwin?

Accepted Answer

Spring: Best for catching Rainbow trout, Smallmouth bass, Largemouth bass, Brown bullhead

Fall: Best for catching Rainbow trout, Smallmouth bass, Largemouth bass, Brown bullhead

Summer: Best for catching Brown bullhead

Question 16

What water recreation activities are available at Lake Merwin?

Accepted Answer

Lake Merwin offers various recreational opportunities including:
      - Fishing

Additional lake information:
      - Lake size: 3840.00 acres (6.00 square miles)
      - Maximum depth: 0.00 meters

The lake is particularly suitable for fishing and boating 
      during current conditions. Always check weather forecasts and local regulations before activities.

Question 17

What's the best time to visit Lake Merwin, and how's the weather?

Accepted Answer

The best time to visit Lake Merwin depends on your planned activities:
      - Summer (June-August): Ideal for swimming, boating, and water sports
      - Spring/Fall: Excellent fishing and fewer crowds
      - Winter: Ice fishing when conditions permit
      Current weather is MostlyClear. 
      Check our real-time updates for water temperature and conditions before your visit.

Question 18

What permits and regulations should I know about for Lake Merwin?

Accepted Answer

For Lake Merwin, you should be aware of:
      - Fishing license requirements (check state regulations)
      - Boat registration requirements

For specific requirements and current regulations:
      
      - Contact local authorities
      - Visit the DNR website
      - Visit official websites listed below

Question 19

Where can I find more information about Lake Merwin?

Accepted Answer

You can find detailed information about Lake Merwin through these official resources:
        
        - Additional Information
        
        These resources provide up-to-date information about:
        
        - Current lake conditions
        - Facility hours and availability
        - Special notices and alerts
        
        - Seasonal updates and events
        
        Official websites: https://wdfw.wa.gov/fishing/locations/lowland-lakes/lake-merwin

Question 20

What is the water temperature at Lake Merwin in January?

Accepted Answer

In January, the water temperature at Lake Merwin is approximately 51.50°F. 
        This information helps in planning activities like water activities.

Question 21

What is the water temperature at Lake Merwin in February?

Accepted Answer

In February, the water temperature at Lake Merwin is approximately 50.00°F. 
        This information helps in planning activities like water activities.

Question 22

What is the water temperature at Lake Merwin in March?

Accepted Answer

In March, the water temperature at Lake Merwin is approximately 47.95°F. 
        This information helps in planning activities like water activities.

Question 23

What is the water temperature at Lake Merwin in April?

Accepted Answer

In April, the water temperature at Lake Merwin is approximately 57.57°F. 
        This information helps in planning activities like water activities.

Question 24

What is the water temperature at Lake Merwin in May?

Accepted Answer

In May, the water temperature at Lake Merwin is approximately 59.36°F. 
        This information helps in planning activities like water activities.

Question 25

What is the water temperature at Lake Merwin in June?

Accepted Answer

In June, the water temperature at Lake Merwin is approximately 61.14°F. 
        This information helps in planning activities like water activities.

Question 26

What is the water temperature at Lake Merwin in July?

Accepted Answer

In July, the water temperature at Lake Merwin is approximately 70.50°F. 
        This information helps in planning activities like water activities.

Question 27

What is the water temperature at Lake Merwin in August?

Accepted Answer

In August, the water temperature at Lake Merwin is approximately 70.71°F. 
        This information helps in planning activities like water activities.

Question 28

What is the water temperature at Lake Merwin in September?

Accepted Answer

In September, the water temperature at Lake Merwin is approximately 65.48°F. 
        This information helps in planning activities like water activities.

Question 29

What is the water temperature at Lake Merwin in October?

Accepted Answer

In October, the water temperature at Lake Merwin is approximately 64.36°F. 
        This information helps in planning activities like water activities.

Question 30

What is the water temperature at Lake Merwin in November?

Accepted Answer

In November, the water temperature at Lake Merwin is approximately 61.50°F. 
        This information helps in planning activities like water activities.

Question 31

What is the water temperature at Lake Merwin in December?

Accepted Answer

In December, the water temperature at Lake Merwin is approximately 57.43°F. 
        This information helps in planning activities like water activities.

Question 32

What are the current fishing conditions at Lake Merwin?

Accepted Answer

Current water temperature at Lake Merwin is 41°F. 
        Check local fishing reports for the most active species.

Question 33

What is the maximum depth of Lake Merwin?

Accepted Answer

Lake Merwin has a maximum depth of 0.00 meters (0 feet). This depth provides excellent habitat for various fish species and supports diverse aquatic life. The lake's depth profile makes it suitable for both shallow-water fishing and deep-water activities.

Question 34

How big is Lake Merwin?

Accepted Answer

Lake Merwin covers an area of 3840.00 acres (6.00 square miles) at full pool. The lake is currently holding 3696.31 acres of water, which represents 96.3% of its total capacity. This substantial size makes it an important recreational resource for Cowlitz County, offering extensive opportunities for fishing, boating, and other water activities.

Question 35

Where is Lake Merwin located?

Accepted Answer

Lake Merwin is located in Na, Cowlitz County, WA. The lake is accessible to the public and serves as a popular destination for outdoor activities. Its location in Cowlitz County makes it easily accessible from Na and surrounding communities.

Question 36

What is the current water level at Lake Merwin?

Accepted Answer

Lake Merwin is currently holding 3696.31 acres of water, compared to its full capacity of 3840.00 acres. This represents 96.3% of its total capacity. The lake is at a healthy level, ideal for all water activities. These water levels are monitored regularly and impact various recreational activities on the lake.

Lake Merwin

Lake Merwin

Current Conditions

Water Temperature

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Forecast: Tuesday, Apr 29

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Temperature

Precipitation

Wind

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Solunar Fishing Forecast

Outlook for Tuesday at Lake Merwin

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Lake Information

Common Fish Species

Rainbow trout

Smallmouth bass

Largemouth bass

Nearby Lakes

Lake Sammamish

Lake Chelan

Lake Stevens

Hagg Lake

Water Temperature History

Temperature Trend: Last 12 Months

Key Observations (Last 12 Months)

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Frequently Asked Questions About Lake Merwin

What is the current water temperature at Lake Merwin?

What is the size and depth of Lake Merwin?

What county and state is Lake Merwin in?

How often is the Lake Merwin water temperature updated?