Petenwell Lake

WISCONSIN


Lake Level 923.57 FEET 1/1/2026 Full Pool: 0.0 History, Alerts, More... click here	Advertise with us

Petenwell Lake News

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November 2025 Water Resources Outlook

NWS Southeast River Forecast Center

Date: 11/20/2025

November 2025 review of Southeast Rivers for the past month and an outlook on factors that will impact future streamflows…

October 2025 Water Resources Outlook

NWS Southeast River Forecast Center

Date: 10/20/2025

The Southeast River Forecast Center October 2025 Water Resources Outlook. This outlook reviews recent influences on Southeast US streamflow's and provides an outlook of the coming months streamflow influences…

September 2025 Water Resources Outlook

NWS Southeast River Forecast Center

Date: 9/22/2025

The Southeast River Forecast Center September 2025 Water Resources Outlook. This outlook reviews recent influences on southeast US streamflow's and provides an outlook of the coming months streamflow influences…

What Will the Long July 4 Holiday Weekend Be Like on the Water for Boaters?

BoatUS News

Date: 6/30/2025

TowBoatUS predicts more than 2,500 requests for on-water assistance SPRINGFIELD, Va., June 30, 2025 – When NOAA, The Weather Channel and even the Farmer’s Almanac all agree this summer will be hotter than average, boaters know they will need to prepare for the heat. However, on America’s July 4…

Water Resources Outlook for September 2023

National Weather Service

Date: 9/21/2023

Southeast River Forecast Center Water Resources Outlook for September 2023 addressing flooding and drought issues across the southeast U.S…

2:40:13 AM

UPCOMING EVENTS

1/1/2026 - New Year's Day

3/15/2026 - Daylight Saving Time Begins

11/1/2026 - Daylight Saving Time Ends

3/14/2027 - Daylight Saving Time Begins

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• Surface Area: 23,040 Acres

Lake Petenwell is a man-made lake in central Wisconsin, in Adams, Juneau, and Wood counties next to Castle Rock Lake. It covers over 23,000 acres and is 42 feet deep. Lake Petenwell is Wisconsin's second largest lake at 23,040 acres or approximately 36 square miles. It was created in 1948 by the Wisconsin River Power Company with the construction of a dam across the Wisconsin River near Necedah. It has a maximum depth of 42 feet and is used for skiing, sailing and fishing. Private lakefront property is very limited as most of the virgin shoreline is undeveloped forest. Wildlife includes wintering bald eagles. Game fish include walleye, northern pike, bass, panfish, and muskellunge.
The area around the lake has restaurants, a community theater, a golf course and two casinos.
Lake Petenwell has blue-green algae blooms in the summer, the toxicity of which is unknown. The algae, which exists naturally in most lakes, is magnified on Lake Petenwell as a result of industrial and agricultural sources upstream. The Wisconsin Department of Natural Resources has recommended that humans and pets not use the waterway for recreational use.

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