Lake Wilhelm

Lake Wilhelm

New Lebanon, Mercer County, PA
3mi²
ft
Directions
Lake Information

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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Current Conditions

65°F°
Feels like 65°F°
Cloudy
Today's High
77°F°
Today's Low
53°F°

Water Temperature

56°F
Updated: (Apr 26)
Sign in to contribute temps.

Current water temperature for Lake Wilhelm is 56°F.

Current Snapshot

Wind2 mph SSE (Gust 7 mph)
Pressure
30.10 inHg
Visibility33 mi
Humidity38%
Cloud Cover97%

Forecast: Tuesday, Apr 29

Day 1 of 9

Hourly Insights

7 AM
56°F°
10 AM
68°F°
1 PM
75°F°
4 PM
74°F°
52%
7 PM
70°F°
36%

Temperature

High
77°F°
Low
53°F°

Precipitation

Chance52%
Amount0.45"
Typerain

Wind

11mph
Avg Speed
Gusts up to
36mph
CalmModerateStrong
Max Speed17 mph

Sun, Moon & UV

Sunrise10:20 AM
Sunset12:16 AM
Moon PhasewaxingCrescent
Max UV Index5 (Moderate)

Solunar Fishing Forecast

Action Rating
4/5

Todays action is rated a 4 (scale is 0 thru 5, 5 is the best)

Major Times (Best)

6:39 PM - 9:09 PM

7:30 AM - 10:00 AM

Minor Times (Good)

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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April 28th 2025

Lake Information

Elevation
N/A
Area
3 mi²
Coordinates
41.418, -80.145

Weather Forecast

Tuesday

77°F
53°F

Wednesday

64°F
38°F

Thursday

77°F
48°F

Friday

67°F
53°F

Saturday

53°F
42°F

Sunday

62°F
38°F

Monday

65°F
42°F

Tuesday

66°F
52°F

Wednesday

69°F
53°F
Tuesday - 4/29/2025
77°F
53°F
12am
55°F
56°F
30.06 hPa
2 mph
SSE
G: 9 mph
2am
56°F
56°F
30.04 hPa
3 mph
SSE
G: 10 mph
4am
55°F
56°F
30.03 hPa
6 mph
S
G: 19 mph
6am
55°F
56°F
30.03 hPa
8 mph
S
G: 21 mph
8am
59°F
56°F
30.02 hPa
10 mph
SSW
G: 25 mph
10am
68°F
56°F
29.98 hPa
14 mph
SSW
G: 35 mph
12pm
73°F
56°F
29.94 hPa
15 mph
SW
G: 32 mph
2pm
77°F
56°F
29.90 hPa
17 mph
SW
G: 35 mph
4pm
74°F
56°F
29.88 hPa
14 mph
SW
G: 33 mph
6pm
72°F
56°F
29.87 hPa
13 mph
SW
G: 30 mph
8pm
68°F
56°F
29.89 hPa
11 mph
WSW
G: 26 mph
10pm
62°F
56°F
29.97 hPa
11 mph
WNW
G: 26 mph

Water Temperature History

Trends for Lake Wilhelm

Current Temp

Sign in to view

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

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm09182736

Wind Direction

147°

Pressure

1018 mb

Cloud Cover

6%

Visibility

23 miles

Daily Pressure Forecast

TueWedThuFriSatSunMonTueWed0.008.8617.7226.5835.44
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Frequently Asked Questions About Lake Wilhelm

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