Loading lake details...
Loading lake details...
Grassy Lake
63°F
Grassy Lake
Winton, MN · St. Louis County
63°F water256 acres15 ft deep
Right Now
74°
Mostly Clear
Water
63°
Wind
11 mph
WNW
Gusts
25 mph
Pressure
29.50
steady
LakeMonster planner
Plan Grassy Lake
Grassy Lake
Active temps make wind edges, shallow cover, and feeding windows more important. The planning constraint is finding the right window.
Best first move
Scout a wind-touched point or bank next to deeper water.
use a search bait first, then slow down after the first contact A workable forecast window starts near 6am with about 12 mph wind.
8 lake data sources in this readSee dataHideLatest source updated Jul 21, 5:19 AM CDT
- Current water temp
- 63°F
- Water temp history
- 453 readings
- Hourly weather
- 224 hours
- Solunar timing
- 3/5
- Satellite imagery
- 289 captures
- Thermal imagery
- 734 captures
- Map structure
- available
- Nearby lakes
- 3 options
The quick read is a planning aid, not a safety or access determination. The assistant will state uncertainty when the page does not contain a specific observation.
Forecast - Tue, Jul 21
High / Low
64° / 54°
Wind
10 mph
gusts 30 mph
Precip
65%
UV
4
Sunrise
5:30 AM
Sunset
8:57 PM
7-Day Weather Outlook
Every forecast metric for the week ahead, plus best days for fishing, boating, swimming, and paddling.
9 day forecast
Best Days This Week
Quick recommendations based on wind, precip, pressure, solunar, and temperature.
Best for Fishing
Wed, Jul 29
67/100
Wed, Jul 29 scores 67/100: Solunar 4/5, Wind 5 mph.
Best for Boating
Wed, Jul 22
90/100
Wed, Jul 22 scores 90/100: Wind 8 mph, Rain 0%.
Best for Swimming
Tue, Jul 28
80/100
Tue, Jul 28 scores 80/100: Air 77°F, Rain 0%.
Best for Paddling
Wed, Jul 22
85/100
Wed, Jul 22 scores 85/100: Wind 8 mph, Rain 0%.
Temperature Range
High Low
Precip & Wind
Rain % Wind mph
Daily Breakdown
Swipe to see all 9 days
| Metric | Tue21 | Wed22 | Thu23 | Fri24 | Sat25 | Sun26 | Mon27 | Tue28 | Wed29 |
|---|---|---|---|---|---|---|---|---|---|
| Condition | Drizzle | Partly Cloudy | Drizzle | Drizzle | Thunderstorms | Thunderstorms | Rain | Partly Cloudy | Mostly Clear |
| High / Low | 64°/54° | 72°/51° | 79°/57° | 84°/63° | 85°/65° | 89°/66° | 88°/68° | 77°/61° | 77°/58° |
| Precip | 65% | 0% | 50% | 49% | 54% | 48% | 49% | 0% | 15% |
| Wind | 14 mphgust 30 | 8 mphgust 16 | 11 mphgust 20 | 14 mphgust 28 | 12 mphgust 26 | 7 mphgust 14 | 12 mphgust 21 | 9 mphgust 19 | 5 mphgust 13 |
| Pressure | 29.79" stable | 30.06" rising | 29.98" falling | 29.85" falling | 29.76" falling | 29.71" falling | 29.64" falling | 29.80" rising | 29.98" rising |
| UV Index | 4 | 5 | 7 | 6 | 6 | 6 | 8 | 6 | 8 |
| Sunrise | 5:30 AM | 5:31 AM | 5:33 AM | 5:34 AM | 5:35 AM | 5:36 AM | 5:37 AM | 5:39 AM | 5:40 AM |
| Sunset | 8:57 PM | 8:55 PM | 8:54 PM | 8:53 PM | 8:52 PM | 8:51 PM | 8:49 PM | 8:48 PM | 8:47 PM |
| Bite Rating | 3/5first quarter | 3/5first quarter | 2/5first quarter | 3/5waxing gibbous | 2/5waxing gibbous | 3/5waxing gibbous | 3/5waxing gibbous | 4/5FULL | 4/5FULL |
Today Read
Grassy LakeWind read
Moderate
10 mph avg
Water read
63°
Cool-water mix
Air range
54° / 64°
today
Precip
65%
watch timing
Today's forecast for Grassy Lake has moderate wind, 54F to 64F air temperatures, 65% chance of precipitation, and 63F water.
Fishing Forecast
first quarter
3/5
Major
6:44 PM - 9:14 PM
Minor
1:55 PM - 3:25 PM
Try Premium Features
Detailed temperature readings across your lake.
No credit card required for preview
July 18, 2026
Water Temperature History
Current
68°
Jul 26
Low
32°
Feb 15
Average
52°
Last 12 Months
Warmest avg: July (68°F)
Coolest avg: February (37°F)
Rapid warming: April → May (+17°F)
Sharpest cooling: August → September (-12°F)
Weather Forecast
Wind speed, gusts, and pressure trends for trip timing.
7 day view
Hourly Wind Forecast
Swipe days or tap points
21
12am - 11pm
Wind SpeedWind Gust
Tap pointsPeak Wind
14 mph
10am
Peak Gust
30 mph
highest gust
Pressure
29.55 inHg
steady
Visibility
9 mi
97% clouds
Tap chart for details, swipe left or right for different days.Tap chart for details • Swipe for different days
Daily Pressure Forecast
Pressure stability helps plan windows
Pressure
Tap for detailsTap chart points for pressure details
Nearby Lakes
Fishing Forecast
3/5first quarter
Major6:44 PM - 9:14 PM
Minor1:55 PM - 3:25 PM
Water at 63°F -- good for cool-water species.
Nearby Lakes
Lake facts
About Grassy Lake
Direct answers from the lake profile and latest available condition data. Verify access, regulations, weather alerts, and safety conditions with local authorities.
The latest available LakeMonster reading for Grassy Lake, updated Jul 21, 2026, shows 63°F surface water temperature, mostly clear, 11 mph wind. Conditions can vary across the lake and change quickly, so check local weather, access notices, and on-water observations before acting.
Grassy Lake has 256 acres and a reported maximum depth of about 15 feet based on the latest lake profile available to LakeMonster.
Grassy Lake is listed in Winton, St. Louis County, MN. Check the responsible local or state agency for current access rules, permits, closures, and boating restrictions.