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WisconsinReservoir, 10,602 acres, Jefferson County

Lake Koshkonong wind forecast

Shoreline: USGS National Hydrography Dataset

7-day outlook

Daylight hours, 8am to 7pm local time. Wind in knots.

  1. TodayOct 26

    6-11kt

    ENE, gusts 16

    High 60°F, rain 2%

    Good
  2. TueOct 27

    7-9kt

    SE, gusts 15

    High 68°F, rain 5%

    Good
  3. WedOct 28

    5-9kt

    S, gusts 15

    High 71°F, rain 11%

    Good
  4. ThuOct 29

    3-9kt

    WSW, gusts 15

    High 71°F, storms possible

    Stay ashore
  5. FriOct 30

    3-6kt

    SE, gusts 10

    High 69°F, rain 30%

    Use caution
  6. SatOct 31

    5-7kt

    SE, gusts 12

    High 67°F, rain 43%

    Good
  7. SunNov 1

    4-6kt

    S, gusts 10

    High 67°F, rain 35%

    Good

Hour by hour, next 3 days

Wind and gusts0 to 30+ ktScoreGood, caution, stay ashoreNightBest windowArrows point where the wind blows to.

This week on Koshkonong

Over the next 7 days on Lake Koshkonong, the windiest stretch looks like Monday, with gusts to about 16 kt. Friday is the calmest day in the outlook, topping out near 6 kt.

Monday is the pick for sailing, and Friday looks best for kayaks and paddleboards. Mornings are usually calmer than afternoons, so check the hourly strip for the exact window.

Thunderstorms are in the forecast for Thursday. Plan to be off the water before the first rumble; lightning can strike miles ahead of a storm.

Reading a lake wind forecast

Sustained wind is the average over a couple of minutes; gusts are the short peaks. On inland water the gap between the two matters as much as the average. A steady 12 kt is a pleasant sail, while 8 kt gusting 20 kt knocks small boats flat and tires out paddlers.

Lake Koshkonong is large enough for wind to build real waves. When the forecast direction lines up with the long open stretches of the lake, expect bigger chop than the wind speed alone suggests, and plan routes that keep you near a sheltered shore on the way back.

The National Weather Service forecast covers a 2.5 km grid, so local effects like a sea breeze off a big lake, a cold front or afternoon thunderstorms can arrive earlier or stronger than shown. Check the forecast again on the morning you go, and keep an eye on small craft advisories.

Lake Koshkonong forecast questions

What is the wind forecast for Lake Koshkonong this weekend?

In the National Weather Service forecast from October 26: Saturday: SE wind 5 to 7 kt, gusts to 12 kt, high near 67°F. Sunday: S wind 4 to 6 kt, gusts to 10 kt, high near 67°F. The live cards above always show the latest update.

When is the best day to sail on Lake Koshkonong this week?

Based on the National Weather Service forecast from October 26, Monday looks best, with ENE wind around 6 to 11 kt and gusts near 16 kt. Forecasts beyond three days shift, so check the live day cards above and look again the night before.

Where does the Lake Koshkonong wind forecast come from?

From the National Weather Service gridded forecast for the 2.5 km cell over the lake. It is the same forecast local NWS offices use, updated several times a day. We convert wind to knots and add our own go or no-go call for each activity.

What wind is too strong for a kayak or paddleboard?

We flag paddling as risky once sustained wind passes about 8 kt or gusts pass 12 kt, and advise staying ashore above 12 kt sustained or 18 kt gusts. Offshore wind is the most dangerous because it pushes you away from the launch.

Nearby lakes

If Koshkonong is blown out, these are the closest alternatives. Tap through for their wind forecasts.