IllinoisNatural lake, 1,582 acres, Lake County
Grass Lake wind forecast
7-day outlook
Daylight hours, 8am to 7pm local time. Wind in knots.
-
TodayOct 26
8-11kt
NE, gusts 17
High 62°F, rain 4%
Good -
TueOct 27
6-10kt
SE, gusts 16
High 67°F, rain 0%
Good -
WedOct 28
4-8kt
SSW, gusts 13
High 72°F, rain 2%
Good -
ThuOct 29
2-10kt
WSW, gusts 16
High 73°F, storms possible
Stay ashore -
FriOct 30
1-4kt
E, gusts 8
High 70°F, rain 27%
Light wind -
SatOct 31
2-5kt
SE, gusts 9
High 68°F, rain 32%
Use caution -
SunNov 1
2-4kt
SSE, gusts 7
High 68°F, rain 33%
Light wind
Hour by hour, next 3 days
This week on Grass
Over the next 7 days on Grass Lake, the windiest stretch looks like Monday, with gusts to about 17 kt. Friday is the calmest day in the outlook, topping out near 4 kt.
Tuesday is the pick for sailing, and Friday 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 Thursday. 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 Grass, 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.
Grass Lake forecast questions
What is the wind forecast for Grass Lake this weekend?
In the National Weather Service forecast from October 26: Saturday: SE wind 2 to 5 kt, gusts to 9 kt, high near 68°F. Sunday: SSE wind 2 to 4 kt, gusts to 7 kt, high near 68°F. The live cards above always show the latest update.
When is the best day to sail on Grass Lake this week?
Based on the National Weather Service forecast from October 26, Tuesday looks best, with SE wind around 6 to 10 kt and gusts near 16 kt. Forecasts beyond three days shift, so check the live day cards above and look again the night before.
Where does the Grass 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 Grass is blown out, these are the closest alternatives. Tap through for their wind forecasts.