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Monarch Lake
48°F
Monarch Lake
Granby, CO · Grand County
48°F water148.2 acres82 ft deep8,350 ft elev3 fish species
Right Now
71°
Mostly Cloudy
Water
48°
Wind
3 mph
NNW
Gusts
8 mph
Pressure
29.80
rising
LakeMonster planner
Plan Monarch Lake
Monarch Lake
Transition temps can split fish between warming edges and deeper comfort zones. The planning constraint is finding the right window.
Best first move
Scout the first break or defined cover closest to a feeding flat.
fish slowly and keep the bait in the most stable water A workable forecast window starts near 6am with about 3 mph wind.
Listed targets to ask about: Brook trout · Rainbow trout
9 lake data sources in this readSee dataHideLatest source updated Jul 20, 11:41 PM MDT
- Current water temp
- 48°F
- Water temp history
- 394 readings
- Hourly weather
- 224 hours
- Solunar timing
- 3/5
- Fish species
- 3 listed
- Satellite imagery
- 224 captures
- Thermal imagery
- 923 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 - Mon, Jul 20
High / Low
81° / 53°
Wind
4 mph
gusts 18 mph
Precip
54%
UV
9
Sunrise
5:50 AM
Sunset
8:27 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
Tue, Jul 28
67/100
Tue, Jul 28 scores 67/100: Solunar 4/5, Wind 6 mph.
Best for Boating
Tue, Jul 28
77/100
Tue, Jul 28 scores 77/100: Wind 6 mph.
Best for Swimming
Tue, Jul 28
70/100
Tue, Jul 28 scores 70/100: Air 78°F, Wind 6 mph.
Best for Paddling
Tue, Jul 28
80/100
Tue, Jul 28 scores 80/100: Wind 6 mph.
Temperature Range
High Low
Precip & Wind
Rain % Wind mph
Daily Breakdown
Swipe to see all 9 days
| Metric | Mon20 | Tue21 | Wed22 | Thu23 | Fri24 | Sat25 | Sun26 | Mon27 | Tue28 |
|---|---|---|---|---|---|---|---|---|---|
| Condition | Thunderstorms | Thunderstorms | Thunderstorms | Rain | Thunderstorms | Thunderstorms | Thunderstorms | Drizzle | Drizzle |
| High / Low | 81°/53° | 78°/57° | 76°/55° | 70°/54° | 77°/54° | 77°/53° | 76°/55° | 73°/54° | 78°/53° |
| Precip | 54% | 66% | 82% | 73% | 56% | 57% | 55% | 57% | 31% |
| Wind | 9 mphgust 18 | 11 mphgust 20 | 7 mphgust 14 | 9 mphgust 19 | 6 mphgust 16 | 6 mphgust 16 | 5 mphgust 13 | 4 mphgust 11 | 6 mphgust 15 |
| Pressure | 29.83" stable | 29.96" rising | 30.02" rising | 30.07" rising | 30.06" stable | 30.06" stable | 30.03" falling | 30.05" rising | 30.06" rising |
| UV Index | 9 | 9 | 7 | 7 | 8 | 9 | 8 | 7 | 10 |
| Sunrise | 5:50 AM | 5:51 AM | 5:52 AM | 5:53 AM | 5:54 AM | 5:54 AM | 5:55 AM | 5:56 AM | 5:57 AM |
| Sunset | 8:27 PM | 8:26 PM | 8:26 PM | 8:25 PM | 8:24 PM | 8:23 PM | 8:22 PM | 8:21 PM | 8:20 PM |
| Bite Rating | 3/5waxing crescent | 2/5first quarter | 2/5first quarter | 3/5first quarter | 2/5waxing gibbous | 2/5waxing gibbous | 3/5waxing gibbous | 3/5waxing gibbous | 4/5FULL |
Today Read
Monarch LakeWind read
Calm
4 mph avg
Water read
48°
Cold-water pattern
Air range
53° / 81°
today
Precip
54%
watch timing
Today's forecast for Monarch Lake has calm wind, 53F to 81F air temperatures, 54% chance of precipitation, and 48F water.
Fishing Forecast
waxing crescent
3/5
Major
5:57 PM - 8:27 PM
Minor
12:28 PM - 1:58 PM
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July 18, 2026
Fish Species
3Water Temperature History
Current
49°
Jul 26
Low
32°
Feb 16
Average
48°
Last 12 Months
Warmest avg: August (56°F)
Coolest avg: February (39°F)
Rapid warming: May → June (+8°F)
Sharpest cooling: January → February (-14°F)
Weather Forecast
Wind speed, gusts, and pressure trends for trip timing.
7 day view
Hourly Wind Forecast
Swipe days or tap points
20
12am - 11pm
Wind SpeedWind Gust
Tap pointsPeak Wind
9 mph
6pm
Peak Gust
14 mph
highest gust
Pressure
29.85 inHg
rising
Visibility
25 mi
10% 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
3/5waxing crescent
Major5:57 PM - 8:27 PM
Minor12:28 PM - 1:58 PM
Water at 48°F -- target deep areas.
Fish Species
3Nearby Lakes
Lake facts
About Monarch 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 Monarch Lake, updated Jul 20, 2026, shows 48°F surface water temperature, mostly cloudy, 3 mph wind. Conditions can vary across the lake and change quickly, so check local weather, access notices, and on-water observations before acting.
Monarch Lake has 148.2 acres and a reported maximum depth of about 82 feet based on the latest lake profile available to LakeMonster.
Monarch Lake is listed in Granby, Grand County, CO. Check the responsible local or state agency for current access rules, permits, closures, and boating restrictions.
LakeMonster lists Brook trout, Rainbow trout, Cutthroat trout for Monarch Lake. A species listing does not guarantee current activity; use current temperature, weather, recent reports, and local regulations when planning.