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lakeglance

MinnesotaNatural lake, 1,938 acres, Lake County

South Arm Knife Lake wind forecast

Shoreline: USGS National Hydrography Dataset

7-day outlook

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

  1. TodayOct 26

    1-3kt

    NNE, gusts 8

    High 44°F, rain 0%

    Light wind
  2. TueOct 27

    5-7kt

    ESE, gusts 18

    High 46°F, rain 92%

    Use caution
  3. WedOct 28

    4-6kt

    SW, gusts 16

    High 60°F, rain 48%

    Use caution
  4. ThuOct 29

    2-6kt

    WNW, gusts 15

    High 52°F, rain 0%

    Use caution
  5. FriOct 30

    2-4kt

    WNW, gusts 10

    High 52°F, rain 6%

    Light wind
  6. SatOct 31

    3-5kt

    SSE, gusts 12

    High 53°F, rain 35%

    Use caution
  7. SunNov 1

    2-4kt

    WSW, gusts 11

    High 55°F, rain 32%

    Light wind

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 South Arm Knife

Over the next 7 days on South Arm Knife Lake, the windiest stretch looks like Tuesday, with gusts to about 18 kt. Monday is the calmest day in the outlook, topping out near 3 kt.

Saturday 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 South Arm Knife, 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.

South Arm Knife Lake forecast questions

What is the wind forecast for South Arm Knife Lake this weekend?

In the National Weather Service forecast from October 26: Saturday: SSE wind 3 to 5 kt, gusts to 12 kt, high near 53°F. Sunday: WSW wind 2 to 4 kt, gusts to 11 kt, high near 55°F. The live cards above always show the latest update.

When is the best day to sail on South Arm Knife Lake this week?

Based on the National Weather Service forecast from October 26, Saturday looks best, with SSE wind around 3 to 5 kt and gusts near 12 kt. Forecasts beyond three days shift, so check the live day cards above and look again the night before.

Where does the South Arm Knife 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 South Arm Knife is blown out, these are the closest alternatives. Tap through for their wind forecasts.