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Arpan, SD · Butte County
Right Now
Windy
Water
55°
Wind
15 mph
NW
Gusts
22 mph
Pressure
29.86
steady
Forecast - Sat, May 23
High / Low
72° / 40°
Wind
6 mph
gusts 18 mph
Precip
0%
UV
6
Sunrise
11:18 AM
Sunset
2:25 AM
Today Read
Belle Fourche Reservoir (Orman Dam)Wind read
Calm
6 mph avg
Water read
55°
Cool-water mix
Air range
40° / 72°
today
Precip
0%
low concern
Today's forecast for Belle Fourche Reservoir (Orman Dam) has calm wind, 40F to 72F air temperatures, 0% chance of precipitation, and 55F water.
The planner reads this page's water temp, forecast, fish species, solunar timing, reports, and imagery context so you can decide what to throw, when to go, and when to move.
Today's AI read
Transition temps can split fish between warming edges and deeper comfort zones. Wind matters today; use it only where control stays safe. With a weak solunar score, favor stable weather windows.
Uses this lake data
Trip read from the AI planner
Short window onlyFishing Forecast
first quarter
Major
1:04 AM - 3:34 AM
Minor
6:17 PM - 7:47 PM
Detailed temperature readings across your lake.
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Fish Species
8Water Temperature History
Current
61°
May 31
Low
33°
Jan 18
Average
56°
Last 12 Months
Warmest avg: July (77°F)
Coolest avg: January (34°F)
Rapid warming: February → March (+11°F)
Sharpest cooling: October → November (-18°F)
Wind speed, gusts, and pressure trends for trip timing.
Swipe days or tap points
12am - 11pm
Peak Wind
11 mph
7pm
Peak Gust
18 mph
highest gust
Pressure
29.92 inHg
rising
Visibility
16 mi
5% clouds
Tap chart for details, swipe left or right for different days.Tap chart for details • Swipe for different days
Pressure stability helps plan windows
Tap chart points for pressure details
Nearby Lakes
Fishing Forecast
2/5first quarter
Water at 55°F -- good for cool-water species.
Fish Species
8Nearby Lakes
FAQ
Belle Fourche Reservoir (Orman Dam) covers 8040.00 acres (12.56 square miles) with a maximum depth of 18.28 meters (~60 feet).
Belle Fourche Reservoir (Orman Dam) is located in Arpan, Butte County, SD. It is accessible to the public for outdoor activities.