AlaskaNatural lake, 1,202 acres, Matanuska-Susitna Borough
Flat Horn Lake wind forecast
7-day outlook
Daylight hours, 8am to 7pm local time. Wind in knots.
-
MonOct 26
2-15kt
SSE, gusts 23
High 45°F, rain 10%
Use caution -
TueOct 27
7-10kt
NNW, gusts 14
High 40°F, rain 2%
Good -
WedOct 28
1-4kt
N, gusts 6
High 38°F, rain 65%
Light wind -
ThuOct 29
3-4kt
N, gusts 9
High 39°F, rain 62%
Light wind -
FriOct 30
5-7kt
SSE, gusts 18
High 42°F, rain 90%
Use caution -
SatOct 31
3-4kt
ENE, gusts 11
High 39°F, rain 50%
Light wind -
SunNov 1
3-5kt
N, gusts 11
High 36°F, rain 27%
Use caution
Hour by hour, next 3 days
This week on Flat Horn
Over the next 7 days on Flat Horn Lake, the windiest stretch looks like Monday, with gusts to about 23 kt. Wednesday is the calmest day in the outlook, topping out near 4 kt.
Tuesday is the pick for sailing, and Sunday 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 Flat Horn, 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.
Flat Horn Lake forecast questions
What is the wind forecast for Flat Horn Lake this weekend?
In the National Weather Service forecast from October 25: Saturday: ENE wind 3 to 4 kt, gusts to 11 kt, high near 39°F, 50% chance of rain. Sunday: N wind 3 to 5 kt, gusts to 11 kt, high near 36°F. The live cards above always show the latest update.
When is the best day to sail on Flat Horn Lake this week?
Based on the National Weather Service forecast from October 25, Tuesday looks best, with NNW wind around 7 to 10 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 Flat Horn 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 Flat Horn is blown out, these are the closest alternatives. Tap through for their wind forecasts.