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PennsylvaniaReservoir, 1,150 acres

Blue Marsh Lake wind forecast

Blue Marsh Lake, Pennsylvania
Photo: BerksCountyUpdate, CC BY-SA 4.0

7-day outlook

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

  1. TodayOct 26

    1-7kt

    WNW, gusts 11

    High 69°F, rain 1%

    Use caution
  2. TueOct 27

    3-5kt

    N, gusts 10

    High 65°F, rain 0%

    Use caution
  3. WedOct 28

    1-4kt

    SE, gusts 6

    High 64°F, rain 0%

    Light wind
  4. ThuOct 29

    0-6kt

    SW, gusts 10

    High 71°F, rain 0%

    Use caution
  5. FriOct 30

    1-5kt

    W, gusts 10

    High 74°F, rain 0%

    Use caution
  6. SatOct 31

    0-4kt

    SSE, gusts 7

    High 71°F, rain 1%

    Light wind
  7. SunNov 1

    1-7kt

    S, gusts 12

    High 70°F, rain 52%

    Use caution

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 Blue Marsh

Over the next 7 days on Blue Marsh Lake, the windiest stretch looks like Sunday, with gusts to about 12 kt. Wednesday is the calmest day in the outlook, topping out near 4 kt.

Monday 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 Blue Marsh, 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.

Blue Marsh Lake forecast questions

What is the wind forecast for Blue Marsh Lake this weekend?

In the National Weather Service forecast from October 26: Saturday: SSE wind 0 to 4 kt, gusts to 7 kt, high near 71°F. Sunday: S wind 1 to 7 kt, gusts to 12 kt, high near 70°F, 52% chance of rain. The live cards above always show the latest update.

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

Based on the National Weather Service forecast from October 26, Monday looks best, with WNW wind around 1 to 7 kt and gusts near 11 kt. Forecasts beyond three days shift, so check the live day cards above and look again the night before.

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