Lake Wisconsin

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Lake Wisconsin near the Merrimac Ferry

Today’s Forecast:

78°F
Current Temperature
Partly Cloudy
Station: KDLL
Observed at: 2:55 pm
Wind: 9 mph | Humidity: 47%

This Afternoon:Partly sunny, with a high near 81. Southwest wind around 10 mph.
Tonight:Mostly clear, with a low around 61. South wind 5 to 10 mph.
Saturday:A slight chance of showers and thunderstorms between 11am and noon. Mostly sunny, with a high near 86. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

Today’s Report:

Boating

Excellent
  100 /100

Excellent for boating. High near 80°F. Low rain risk (1%). Light wind (10 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Use Caution 48/100

🛶 Paddling

Use Caution
  49 /100

Use Caution for paddling. High near 80°F. Low rain risk (1%). Breezy winds (10 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Marginal weather factor
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Use Caution 48/100

🥾 Hiking

Excellent
  90 /100

Excellent for hiking. High near 80°F. Low rain risk (1%). Light wind (10 mph).

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Use Caution 44/100

🐟 Fishing

Excellent
  94 /100

Excellent for fishing. High near 80°F. Low rain risk (1%). Light wind (10 mph).

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Use Caution 46/100

About Lake Wisconsin

Lake Wisconsin is a broad stretch of the Wisconsin River between the Baraboo area and Lodi, with shoreline communities, bluffs, islands, boat landings, and plenty of room for a full day on the water. It is one of the best places in south-central Wisconsin for boating, fishing, paddling, lakeside stops, and a relaxed summer-day feel.

This is a place where the weather matters. A warm, calm day can be great for boating, fishing, paddling, or spending time along the shore. Wind can make open sections of the lake choppy, though, and summer thunderstorms can change water plans quickly. Checking the timing of wind, rain, and storms before heading out can make the difference between an easy lake day and a frustrating one.

Lake Wisconsin spans Sauk and Columbia counties and covers more than 7,000 acres, with public boat-landings access and a fishery that includes panfish, bass, northern pike, walleye, catfish, and trout. The surrounding area also gives you easy access to scenic overlooks, river towns, parks, and short drives toward Baraboo, Devil’s Lake, Merrimac, Lodi, and Prairie du Sac.

Okee, WI and Gibraltar Rock

Gibraltar Rock lookout with trees, a rock, and scenic view
Gibraltar Rock Scene by Tony Herman

And don’t forget about Okee, which is a small Lake Wisconsin community with an easygoing, close-to-the-water feel and quick access to boating, fishing, paddling, and lakeside time.

It also puts you near Gibraltar Rock State Natural Area, one of the area’s best spots for a short hike with a big payoff. The flat-topped bluff rises about 200 feet above the surrounding landscape and offers wide views across Lake Wisconsin, the Wisconsin River Valley, and the Baraboo Hills. It is a great option on a cooler or breezier day when being out on the water is less appealing, but it is worth paying attention to trail conditions, wind, and storms before heading up to the overlook.

Merrimac Ferry Rides

Just across the lake from Okee, the Merrimac Ferry is part of the experience of exploring the Lake Wisconsin area. The free ferry carries vehicles, cyclists, and pedestrians across the Wisconsin River between Okee and Merrimac, turning a simple crossing into a short scenic break with views of the water and surrounding bluffs.

The crossing takes only about seven minutes, though waits can be longer on busy summer weekends. Because service is seasonal and can be affected by weather or river conditions, it is smart to check the current ferry status before building it into your route. (Wisconsin Department of Transportation)

Make the Most of a Lake Wisconsin Day

Calm mornings are often the best time to get on the water. Paddlers can take advantage of lighter wind, anglers can get an early start, and boaters have a better chance of comfortable conditions before afternoon traffic and weather changes pick up.

When the lake is breezy, consider shifting to a shoreline walk, a scenic drive, a meal in a nearby river town, or a hike at a nearby park instead of pushing a small boat or paddle craft into rougher water. The area is close enough to other outdoor options that you do not have to let one weather change end the day.

Weather Tips for Lake Wisconsin

  • Wind: Wind is one of the biggest factors on Lake Wisconsin. Even a nice-looking day can get choppy on broader, exposed sections of the lake.
  • Thunderstorms: Summer storms can develop fast. Watch the timing, keep an eye on the sky, and get off the water early when lightning is possible.
  • Heat and sun: Open water reflects sunlight and offers little shade. Bring water, sunscreen, and a plan for breaks during hot afternoons.
  • River flow and water levels: Lake conditions can change with weather and river flow. After heavier rain, use extra caution around current, debris, ramps, and shoreline conditions.
  • Cooler seasons: Spring and fall can be great for fishing, hiking, and quiet lake views, but water remains cold longer than the air temperature may suggest.

Plan Around the Conditions

The best Lake Wisconsin days usually begin early and stay flexible. Use the calmer part of the day for boating or paddling, then save lunch, sightseeing, a shoreline stop, or a nearby hike for later. A good forecast helps, but paying attention to wind and storm timing is what really helps you get the most out of the lake.

7-Day Forecast for Lake Wisconsin:

78°F
Current Temperature
Partly Cloudy
Station: KDLL
Observed at: 2:55 pm
Wind: 9 mph | Humidity: 47%
Fri
81° 61°
0%
Sat
86° 69°
16%
Sun
91° 72°
17%
Mon
92° 68°
45%
Tue
90° 65°
5%
Wed
89° 65°
8%
Thu
89° 66°
23%

7-Day High Temperature Trend

81° Fri 86° Sat 91° Sun 92° Mon 90° Tue 89° Wed 89° Thu

7-Day Low Temperature Trend

61° Fri 69° Sat 72° Sun 68° Mon 65° Tue 65° Wed 66° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 20 Fri 12 Sat 12 Sun 4 Mon 20 Tue 20 Wed 12 Thu
Forecast data from the National Weather Service  |  Last Updated: July 24, 2026 3:49 pm CDT