Grayrocks Reservoir

Grayrocks Reservoir

Wheatland, Platte County, WY
5mi²
1340.00ft
Directions
Lake Information

Grayrocks Reservoir is a 3,501-acre man-made lake situated near Wheatland, Wyoming. The reservoir is a popular destination for outdoor enthusiasts due to the variety of recreational activities available, including fishing, boating, hunting, camping, and hiking. The reservoir's abundant fish population is a major draw for anglers, with black crappie, channel catfish, freshwater drum, largemouth bass, smallmouth bass, tiger muskie, walleye, and yellow perch all found within its waters. These fish provide an opportunity for both sport and sustenance for locals and visitors alike. In addition to fishing, Grayrocks Reservoir offers ample opportunities for boating, with multiple boat ramps and docks available for public use. The reservoir's calm waters make it a popular spot for kayaking and paddleboarding, while larger boats can take advantage of the lake's expansive size to explore its numerous coves and inlets. Hunting is another popular activity at Grayrocks Reservoir, with opportunities for both big game and waterfowl hunting available in the surrounding area. The reservoir's location near the Laramie Mountain Range provides ample opportunities for hiking and camping, with numerous trails and campsites available for visitors. Overall, Grayrocks Reservoir is a significant landmark in Wyoming, providing a variety of recreational opportunities for visitors and locals alike. Its diverse fish population, calm waters, and stunning natural surroundings make it a must-visit destination for anyone seeking an outdoor adventure.

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Current Conditions

51°F°
Feels like 40°F°
MostlyCloudy
Today's High
57°F°
Today's Low
34°F°

Water Temperature

53°F
Updated: (Apr 30)
Sign in to contribute temps.

Current water temperature for Grayrocks Reservoir is 53°F.

Current Snapshot

Wind13 mph NNW (Gust 18 mph)
Pressure
29.92 inHg
Visibility15 mi
Humidity62%
Cloud Cover86%

Forecast: Thursday, May 1

Day 1 of 9

Hourly Insights

7 AM
37°F°
10 AM
52°F°
1 PM
57°F°
6%
4 PM
54°F°
21%

Temperature

High
57°F°
Low
34°F°

Precipitation

Chance27%
Amount0.04"
Typerain

Wind

11mph
Avg Speed
Gusts up to
38mph
CalmModerateStrong
Max Speed24 mph

Sun, Moon & UV

Sunrise11:54 AM
Sunset1:58 AM
Moon PhasewaxingCrescent
Max UV Index5 (Moderate)

Solunar Fishing Forecast

Action Rating
2/5

Todays action is rated a 2 (scale is 0 thru 5, 5 is the best)

Major Times (Best)

10:30 PM - 1:00 AM

7:55 AM - 10:25 AM

Minor Times (Good)

2:13 PM - 3:43 PM

6:00 AM - 6:00 AM

Outlook for Thursday at Grayrocks Reservoir

Expect temperatures ranging from 34°F to 57°F. There's a 27% chance of rain, potentially bringing around 0.04" rain. Winds will be averaging 11 mph, with potential gusts reaching up to 38 mph. The maximum UV index will be 5 (Moderate), so plan sun protection accordingly. For anglers, today's fishing action is rated 2/5 (Todays action is rated a 2 (scale is 0 thru 5, 5 is the best)). Look for the best bite times during the major periods around 10:30 PM and 7:55 AM, or try the minor windows near 2:13 PM and 6:00 AM for potential early morning or evening action. Check back for the latest conditions and forecasts for Grayrocks Reservoir.

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May 1st 2025

Lake Information

Elevation
1340 ft
Area
5 mi²
Coordinates
42.150, -104.712

Weather Forecast

Thursday

57°F
34°F

Friday

65°F
33°F

Saturday

76°F
36°F

Sunday

75°F
42°F

Monday

65°F
45°F

Tuesday

56°F
43°F

Wednesday

61°F
40°F

Thursday

70°F
39°F

Friday

70°F
44°F
Thursday - 5/1/2025
57°F
34°F
12am
41°F
53°F
30.04 hPa
5 mph
W
G: 10 mph
2am
38°F
53°F
30.05 hPa
2 mph
WNW
G: 6 mph
4am
35°F
53°F
30.06 hPa
3 mph
W
G: 7 mph
6am
34°F
53°F
30.08 hPa
4 mph
W
G: 7 mph
8am
42°F
53°F
30.09 hPa
5 mph
W
G: 9 mph
10am
52°F
53°F
30.05 hPa
7 mph
NW
G: 17 mph
12pm
57°F
53°F
30.01 hPa
12 mph
NW
G: 22 mph
2pm
55°F
53°F
30.00 hPa
15 mph
NW
G: 25 mph
4pm
54°F
53°F
30.02 hPa
19 mph
NNW
G: 27 mph
6pm
53°F
53°F
30.05 hPa
22 mph
NNW
G: 31 mph
8pm
46°F
53°F
30.10 hPa
24 mph
NNW
G: 38 mph
10pm
42°F
53°F
30.17 hPa
11 mph
NW
G: 23 mph

Water Temperature History

Trends for Grayrocks Reservoir

Current Temp

Sign in to view

Latest recorded surface temperature.

Lowest in Period

34°F

On Apr 5

Coldest point in the Last 12 Months.

Average in Period

50°F

Typical temp during the Last 12 Months.

Temperature Trend: Last 12 Months

Surface temperature over the selected period.

Key Observations (Last 12 Months)

  • Warmest avg: July (79°F).
  • Coolest avg: February (35°F).
  • Rapid warming often occurs: April → May (+18°F).
  • Sharpest cooling trend: September → October (-15°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm010203040

Wind Direction

276°

Pressure

1017 mb

Cloud Cover

10%

Visibility

11 miles

Daily Pressure Forecast

ThuFriSatSunMonTueWedThuFri0.008.8617.7226.5835.44
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Frequently Asked Questions About Grayrocks Reservoir

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