
Lake Wilhelm
Lake Wilhelm is a picturesque man-made lake situated within Maurice K. Goddard State Park in Mercer County, Pennsylvania, and is a popular destination for fishing and boating enthusiasts. The lake was formed by damming Sandy Creek in 1971 and has since then become a major attraction for outdoor recreation in the area. The lake is surrounded by lush greenery and rolling hills, providing visitors with stunning views of the landscape. The park itself features a wide range of activities for visitors to enjoy, including hiking trails, picnic areas, camping facilities, and an extensive network of biking trails. One of the main attractions of Lake Wilhelm is the abundance of fish species that can be caught in its waters. Anglers can expect to reel in species such as bass, walleye, musky, northern pike, and catfish, among others. The lake's prime location and well-managed fish populations make it a popular destination for fishing tournaments. The lake is also known for its clean water and healthy fish populations, making it a favorite spot for catch-and-release fishing. Boating is another popular activity at Lake Wilhelm. The lake features two marinas, boat launches, and plenty of dock space, making it easy for visitors to enjoy a day out on the water. The lake has a 20 horsepower limit on boats, making it a safe place for boaters of all skill levels. The calm waters and picturesque surroundings provide an ideal setting for kayaking, paddleboarding, and canoeing. Aside from fishing and boating, visitors to Lake Wilhelm can enjoy a variety of other outdoor activities in the surrounding state park. The park offers miles of hiking trails that wind through dense forests, rolling hills, and along the lake's shoreline. Picnic areas, pavilions, and campsites provide visitors with ample opportunities to enjoy the beautiful surroundings, and the park's extensive network of biking trails offers a thrilling way to explore the area. In summary, Lake Wilhelm is a beautiful and popular destination for outdoor enthusiasts, particularly those interested in fishing and boating. The lake's well-managed fish populations and clean water, coupled with the park's many other amenities, make it an ideal spot for families and individuals looking to enjoy a day out in nature. With so many activities available, visitors to Lake Wilhelm are sure to find something to suit their interests and make lasting memories.
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Lake Wilhelm
Lake Wilhelm is a picturesque man-made lake situated within Maurice K. Goddard State Park in Mercer County, Pennsylvania, and is a popular destination for fishing and boating enthusiasts. The lake was formed by damming Sandy Creek in 1971 and has since then become a major attraction for outdoor recreation in the area. The lake is surrounded by lush greenery and rolling hills, providing visitors with stunning views of the landscape. The park itself features a wide range of activities for visitors to enjoy, including hiking trails, picnic areas, camping facilities, and an extensive network of biking trails. One of the main attractions of Lake Wilhelm is the abundance of fish species that can be caught in its waters. Anglers can expect to reel in species such as bass, walleye, musky, northern pike, and catfish, among others. The lake's prime location and well-managed fish populations make it a popular destination for fishing tournaments. The lake is also known for its clean water and healthy fish populations, making it a favorite spot for catch-and-release fishing. Boating is another popular activity at Lake Wilhelm. The lake features two marinas, boat launches, and plenty of dock space, making it easy for visitors to enjoy a day out on the water. The lake has a 20 horsepower limit on boats, making it a safe place for boaters of all skill levels. The calm waters and picturesque surroundings provide an ideal setting for kayaking, paddleboarding, and canoeing. Aside from fishing and boating, visitors to Lake Wilhelm can enjoy a variety of other outdoor activities in the surrounding state park. The park offers miles of hiking trails that wind through dense forests, rolling hills, and along the lake's shoreline. Picnic areas, pavilions, and campsites provide visitors with ample opportunities to enjoy the beautiful surroundings, and the park's extensive network of biking trails offers a thrilling way to explore the area. In summary, Lake Wilhelm is a beautiful and popular destination for outdoor enthusiasts, particularly those interested in fishing and boating. The lake's well-managed fish populations and clean water, coupled with the park's many other amenities, make it an ideal spot for families and individuals looking to enjoy a day out in nature. With so many activities available, visitors to Lake Wilhelm are sure to find something to suit their interests and make lasting memories.
Read more detailsCurrent Conditions
Water Temperature
Current water temperature for Lake Wilhelm is 56°F.
Current Snapshot
Forecast: Tuesday, Apr 29
Thunderstorms
Hourly Insights
Temperature
Precipitation
Wind
Sun, Moon & UV
Solunar Fishing Forecast
Todays action is rated a 4 (scale is 0 thru 5, 5 is the best)
6:39 PM - 9:09 PM
7:30 AM - 10:00 AM
10:41 AM - 12:11 PM
4:00 AM - 4:00 AM
Outlook for Tuesday at Lake Wilhelm
Expect temperatures ranging from 53°F to 77°F. There's a 52% chance of rain, potentially bringing around 0.45" rain. Winds will be averaging 11 mph, with potential gusts reaching up to 36 mph. The maximum UV index will be 5 (Moderate), so plan sun protection accordingly. For anglers, today's fishing action is rated 4/5 (Todays action is rated a 4 (scale is 0 thru 5, 5 is the best)). Look for the best bite times during the major periods around 6:39 PM and 7:30 AM, or try the minor windows near 10:41 AM and 4:00 AM for potential early morning or evening action. Check back for the latest conditions and forecasts for Lake Wilhelm.
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Lake Information
Nearby Lakes
Water Temperature History
Trends for Lake Wilhelm
Current Temp
Latest recorded surface temperature.
Lowest in Period
36°F
On Dec 22
Coldest point in the Last 12 Months.
Average in Period
58°F
Typical temp during the Last 12 Months.
Temperature Trend: Last 12 Months
Surface temperature over the selected period.
Key Observations (Last 12 Months)
- Warmest avg: August (79°F).
- Coolest avg: December (37°F).
- Rapid warming often occurs: April → May (+14°F).
- Sharpest cooling trend: November → December (-15°F).
Weather Forecast
Wind speed and pressure trends
Hourly Wind Forecast
Wind Direction
147°
Pressure
1018 mb
Cloud Cover
6%
Visibility
23 miles
Daily Pressure Forecast


Frequently Asked Questions About Lake Wilhelm
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