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Map of Alcova Reservoir
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IntermediateBoth

Alcova Reservoir

Wyoming, United StatesDirections
Open Water suggested3–31 m (10–100 ft) depthBoth entry

Alcova Reservoir at a glance

Alcova Reservoir is an intermediate both dive site in Wyoming, United States with depths of 3–30.5 m (10–100 ft). Typically most favorable Sep · from 3 years of archive data. Divers commonly see Crayfish, Rainbow trout, and Walleye. Check the latest conditions and entry details before you go.

Moderate window now· until 18:00, then favorable until 19:00 · sunset 18:08

Wind forecast for this hour · 17:00 · run 6 h ago
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Tap a factor for its source and model point

Site hazards: High-altitude dive profile; wind exposure on the open reservoir; boat traffic; past diver fatality reported.

Read the full hazards ↓

Dive windows this week

Mon17:00–18:00 moderate, 18:00–19:00 favorable

11 kn wind (11 kn wind)

Tue17:00–18:00 moderate, 18:00–19:00 favorable

18 kn wind (18 kn wind)

Wed8:00–13:00 moderate

16 kn wind (16 kn wind)

Thu8:00–19:00 favorable

10 kn wind (10 kn wind)

Fri8:00–11:00 favorable, 11:00–19:00 moderate

11 kn wind (11 kn wind)

Sat8:00–14:00 favorable, 14:00–16:00 moderate, 16:00–19:00 favorable

10 kn wind (10 kn wind)

Sun8:00–13:00 moderate, 13:00–18:00 favorable

10 kn wind (10 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wind forecasts. Numbers under each bar are daylight averages.

First light 7:04 · Sunrise 7:33 · Sunset 18:08 · some windows run past sunset

Source: Open-Meteo wind · updated 26 Oct, 11:21 GMT-6

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Alcova Reservoir

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Known for: Crayfish, Rainbow trout, Walleye
Best time: June through August.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 53% of days have historically been favorable, wind has typically been 15 knots
  2. February, 24% of days have historically been favorable, wind has typically been 19 knots
  3. March, 34% of days have historically been favorable, wind has typically been 17 knots
  4. April, 50% of days have historically been favorable, wind has typically been 15 knots
  5. May, 53% of days have historically been favorable, wind has typically been 14 knots
  6. June, 41% of days have historically been favorable, wind has typically been 15 knots
  7. July, 53% of days have historically been favorable, wind has typically been 14 knots
  8. August, 47% of days have historically been favorable, wind has typically been 14 knots
  9. September, 64% of days have historically been favorable, wind has typically been 13 knots, historically most favorable
  10. October, 53% of days have historically been favorable, wind has typically been 13 knots
  11. November, 37% of days have historically been favorable, wind has typically been 16 knots
  12. December, 35% of days have historically been favorable, wind has typically been 16 knots

September has typically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Data updated June 2026

Site details

A roughly 2,470-acre reservoir about 30 minutes southwest of Casper on Highway 220, around 100 feet deep, and the most accessible regularly dived site in central Wyoming. The dam area and Sandy Beach generally have the best visibility from June through August. The rocky bottom is stocked with trout, walleye and perch, and freshwater crawfish are common. Best accessed by boat, though some shore entries require only a short walk with gear.

boatshore

High-altitude dive profile; wind exposure on the open reservoir; boat traffic; past diver fatality reported.

Reviews

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