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PennsylvaniaNatural lake, 1,567 acres, Mercer County

Lake Wilhelm wind forecast

Lake Wilhelm, Pennsylvania
Photo: Designism, CC0

7-day outlook

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

  1. TodayOct 26

    3-5kt

    W, gusts 8

    High 67°F, rain 1%

    Use caution
  2. TueOct 27

    1-3kt

    NE, gusts 5

    High 65°F, rain 0%

    Light wind
  3. WedOct 28

    4-5kt

    SSE, gusts 8

    High 68°F, rain 0%

    Good
  4. ThuOct 29

    5-9kt

    SSW, gusts 13

    High 70°F, rain 0%

    Good
  5. FriOct 30

    3-6kt

    WNW, gusts 9

    High 69°F, rain 3%

    Good
  6. SatOct 31

    3-4kt

    SE, gusts 7

    High 67°F, rain 4%

    Light wind
  7. SunNov 1

    5-7kt

    SSE, gusts 12

    High 66°F, rain 56%

    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 Wilhelm

Over the next 7 days on Lake Wilhelm, the windiest stretch looks like Thursday, with gusts to about 13 kt. Tuesday is the calmest day in the outlook, topping out near 3 kt.

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

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.

On a lake the size of Wilhelm, waves stay modest, but nearby hills, trees and buildings bend the wind. Expect shifts and puffs, especially close to shore, and treat the forecast speed as an average across open water.

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 Wilhelm forecast questions

What is the wind forecast for Lake Wilhelm this weekend?

In the National Weather Service forecast from October 26: Saturday: SE wind 3 to 4 kt, gusts to 7 kt, high near 67°F. Sunday: SSE wind 5 to 7 kt, gusts to 12 kt, high near 66°F, 56% chance of rain. The live cards above always show the latest update.

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

Based on the National Weather Service forecast from October 26, Thursday looks best, with SSW wind around 5 to 9 kt and gusts near 13 kt. Forecasts beyond three days shift, so check the live day cards above and look again the night before.

Where does the Lake Wilhelm 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 Wilhelm is blown out, these are the closest alternatives. Tap through for their wind forecasts.