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South DakotaReservoir, 4,753 acres

Angostura Reservoir wind forecast

Angostura Reservoir, South Dakota
Photo: U.S. Bureau of Reclamation photographer, Public domain

7-day outlook

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

  1. TodayOct 26

    7-12kt

    ENE, gusts 17

    High 43°F, rain 80%

    Good
  2. TueOct 27

    7-26kt

    WSW, gusts 42

    High 67°F, rain 0%

    Stay ashore
  3. WedOct 28

    5-12kt

    WNW, gusts 23

    High 64°F, rain 4%

    Use caution
  4. ThuOct 29

    5-8kt

    S, gusts 13

    High 67°F, rain 0%

    Good
  5. FriOct 30

    6-10kt

    E, gusts 18

    High 64°F, rain 11%

    Good
  6. SatOct 31

    4-7kt

    WNW, gusts 13

    High 62°F, rain 14%

    Good
  7. SunNov 1

    5-12kt

    SE, gusts 22

    High 61°F, rain 46%

    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 Angostura

Over the next 7 days on Angostura Reservoir, the windiest stretch looks like Tuesday, with gusts to about 42 kt. Saturday is the calmest day in the outlook, topping out near 7 kt.

Friday is the pick for sailing, and Thursday 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 Angostura, 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.

Angostura Reservoir forecast questions

What is the wind forecast for Angostura Reservoir this weekend?

In the National Weather Service forecast from October 26: Saturday: WNW wind 4 to 7 kt, gusts to 13 kt, high near 62°F. Sunday: SE wind 5 to 12 kt, gusts to 22 kt, high near 61°F. The live cards above always show the latest update.

When is the best day to sail on Angostura Reservoir this week?

Based on the National Weather Service forecast from October 26, Friday looks best, with E wind around 6 to 10 kt and gusts near 18 kt. Forecasts beyond three days shift, so check the live day cards above and look again the night before.

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