IdahoReservoir, 2,288 acres, Boise County, Elmore County
Arrowrock Reservoir wind forecast
7-day outlook
Daylight hours, 8am to 7pm local time. Wind in knots.
-
TodayOct 26
3-13kt
SSW, gusts 18
High 58°F, storms possible
Stay ashore -
TueOct 27
3-6kt
SW, gusts 8
High 50°F, rain 8%
Good -
WedOct 28
2-7kt
SSE, gusts 11
High 55°F, rain 1%
Good -
ThuOct 29
2-5kt
SE, gusts 9
High 58°F, rain 2%
Use caution -
FriOct 30
2-4kt
WSW, gusts 10
High 56°F, rain 9%
Light wind -
SatOct 31
1-3kt
SE, gusts 9
High 54°F, rain 40%
Light wind -
SunNov 1
2-4kt
WNW, gusts 9
High 54°F, rain 37%
Light wind
Hour by hour, next 3 days
This week on Arrowrock
Over the next 7 days on Arrowrock Reservoir, the windiest stretch looks like Monday, with gusts to about 18 kt. Saturday is the calmest day in the outlook, topping out near 3 kt.
Wednesday 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.
Thunderstorms are in the forecast for Monday. Plan to be off the water before the first rumble; lightning can strike miles ahead of a storm.
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 Arrowrock, 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.
Arrowrock Reservoir forecast questions
What is the wind forecast for Arrowrock Reservoir this weekend?
In the National Weather Service forecast from October 26: Saturday: SE wind 1 to 3 kt, gusts to 9 kt, high near 54°F. Sunday: WNW wind 2 to 4 kt, gusts to 9 kt, high near 54°F. The live cards above always show the latest update.
When is the best day to sail on Arrowrock Reservoir this week?
Based on the National Weather Service forecast from October 26, Wednesday looks best, with SSE wind around 2 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 Arrowrock 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 Arrowrock is blown out, these are the closest alternatives. Tap through for their wind forecasts.