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CaliforniaReservoir, 2,735 acres, El Dorado County

Union Valley Reservoir wind forecast

Union Valley Reservoir, California
Photo: sdold, CC BY-SA 3.0

7-day outlook

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

  1. TodayOct 26

    2-8kt

    SW, gusts 19

    High 55°F, rain 10%

    Use caution
  2. TueOct 27

    2-6kt

    SW, gusts 14

    High 54°F, rain 0%

    Use caution
  3. WedOct 28

    1-4kt

    WSW, gusts 9

    High 57°F, rain 0%

    Light wind
  4. ThuOct 29

    1-5kt

    SW, gusts 14

    High 54°F, rain 2%

    Use caution
  5. FriOct 30

    2-6kt

    SW, gusts 15

    High 50°F, rain 16%

    Use caution
  6. SatOct 31

    1-5kt

    SW, gusts 12

    High 46°F, rain 49%

    Use caution
  7. SunNov 1

    1-6kt

    NNW, gusts 11

    High 48°F, rain 32%

    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 Union Valley

Over the next 7 days on Union Valley Reservoir, the windiest stretch looks like Monday, with gusts to about 19 kt. Wednesday is the calmest day in the outlook, topping out near 4 kt.

Tuesday is the pick for sailing, and Wednesday 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 Union Valley, 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.

Union Valley Reservoir forecast questions

What is the wind forecast for Union Valley Reservoir this weekend?

In the National Weather Service forecast from October 26: Saturday: SW wind 1 to 5 kt, gusts to 12 kt, high near 46°F. Sunday: NNW wind 1 to 6 kt, gusts to 11 kt, high near 48°F. The live cards above always show the latest update.

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

Based on the National Weather Service forecast from October 26, Tuesday looks best, with SW wind around 2 to 6 kt and gusts near 14 kt. Forecasts beyond three days shift, so check the live day cards above and look again the night before.

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