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Alcova Reservoir sits in Wyoming and is classified as a reservoir. It covers roughly 2,470 surface acres (about 4 square miles). Research-grade observations nearby include Rainbow Trout, Rocky Mountain Cutthroat Trout, and Lahontan Cutthroat Trout. A nearby water gauge supplies level and temperature readings where available. The page brings together an hourly and 7-day forecast, wind and gust outlook, water readings, fishing conditions, and activity scores for boating, paddling, and swimming. Current weather, wind, and activity conditions for Alcova Reservoir are updated throughout the day.
Updated
Alerts are published by official agencies and shown verbatim. View the official alert source.
High Wind Warning issued October 11 at 10:32AM MDT until October 12 at 6:00AM MDT by NWS Riverton WY
Overall Very Poor / Avoid (34/100) across 4 activities. Best right now: Fishing (47/100).
How the score is calculated →Best good fishing window, averaging 77/100 across these hours. Dawn hours (07:00 local). Sky is partly cloudy (37% cloud cover). Derived from the hourly forecast; official alerts are not forecast and are checked separately.
| Metric | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 65° | 67° | 70° | 69° | 68° | 67° | 66° | 64° | 62° | 61° | 60° | 59° | 58° | 57° | 56° | 55° | 54° | 52° | 53° | 53° | 54° | 56° | 58° | 60° |
| Wind (kts) | 13 | 13 | 15 | 16 | 16 | 18 | 18 | 17 | 19 | 17 | 18 | 22 | 25 | 27 | 25 | 18 | 17 | 18 | 16 | 15 | 16 | 18 | 18 | 18 |
| Direction | SW | SW | SW | SW | SW | SW | SW | S | SW | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | W |
| Gusts (kts) | 21 | 20 | 24 | 25 | 26 | 29 | 29 | 28 | 30 | 28 | 29 | 35 | 40 | 43 | 40 | 28 | 28 | 28 | 25 | 25 | 26 | 29 | 29 | 29 |
| Precip % | 25% | 43% | 15% | 18% | 14% | 36% | 36% | 10% | 15% | 5% | 5% | 4% | 4% | 3% | 4% | 4% | 4% | 4% | 3% | 4% | 5% | 6% | 7% | 12% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Sun, 1 PM MDT | 65°F | 15 mph SSW (203°) | 24 mph | 25% | 71% | Chance Showers And Thunderstorms |
| Sun, 2 PM MDT | 67°F | 15 mph SSW (203°) | 23 mph | 43% | 63% | Chance Showers And Thunderstorms |
| Sun, 3 PM MDT | 70°F | 17 mph SSW (203°) | 28 mph | 15% | 68% | Slight Chance Showers And Thunderstorms |
| Sun, 4 PM MDT | 69°F | 18 mph SSW (203°) | 29 mph | 18% | 54% | Slight Chance Showers And Thunderstorms |
| Sun, 5 PM MDT | 68°F | 18 mph SSW (203°) | 30 mph | 14% | 51% | Slight Chance Showers And Thunderstorms |
| Sun, 6 PM MDT | 67°F | 21 mph SSW (203°) | 33 mph | 36% | 49% | Chance Showers And Thunderstorms |
| Sun, 7 PM MDT | 66°F | 21 mph SSW (203°) | 33 mph | 36% | 74% | Chance Showers And Thunderstorms |
| Sun, 8 PM MDT | 64°F | 20 mph S (180°) | 32 mph | 10% | 59% | Slight Chance Showers And Thunderstorms |
| Sun, 9 PM MDT | 62°F | 22 mph SSW (203°) | 35 mph | 15% | 39% | Slight Chance Rain Showers |
| Sun, 10 PM MDT | 61°F | 20 mph S (180°) | 32 mph | 5% | 53% | Mostly Cloudy |
| Sun, 11 PM MDT | 60°F | 21 mph SSW (203°) | 33 mph | 5% | 40% | Partly Cloudy |
| Mon, 12 AM MDT | 59°F | 25 mph SSW (203°) | 40 mph | 4% | 33% | Partly Cloudy |
| Mon, 1 AM MDT | 58°F | 29 mph SSW (203°) | 46 mph | 4% | 34% | Partly Cloudy |
| Mon, 2 AM MDT | 57°F | 31 mph SSW (203°) | 50 mph | 3% | 34% | Partly Cloudy |
| Mon, 3 AM MDT | 56°F | 29 mph SW (225°) | 46 mph | 4% | 33% | Partly Cloudy |
| Mon, 4 AM MDT | 55°F | 21 mph SW (225°) | 32 mph | 4% | 39% | Partly Cloudy |
| Mon, 5 AM MDT | 54°F | 20 mph SW (225°) | 32 mph | 4% | 31% | Partly Cloudy |
| Mon, 6 AM MDT | 52°F | 21 mph SW (225°) | 32 mph | 4% | 27% | Mostly Sunny |
| Mon, 7 AM MDT | 53°F | 18 mph SW (225°) | 29 mph | 3% | 37% | Mostly Sunny |
| Mon, 8 AM MDT | 53°F | 17 mph SW (225°) | 29 mph | 4% | 34% | Mostly Sunny |
| Mon, 9 AM MDT | 54°F | 18 mph SW (225°) | 30 mph | 5% | 14% | Sunny |
| Mon, 10 AM MDT | 56°F | 21 mph WSW (248°) | 33 mph | 6% | 15% | Sunny |
| Mon, 11 AM MDT | 58°F | 21 mph WSW (248°) | 33 mph | 7% | 21% | Sunny |
| Mon, 12 PM MDT | 60°F | 21 mph WSW (248°) | 33 mph | 12% | 34% | Mostly Sunny |
| Mon, 1 PM MDT | 62°F | 22 mph WSW (248°) | 35 mph | 15% | 42% | Slight Chance Rain Showers |
Official National Weather Service hourly forecast. Showing 10 of 25 hours. Wind arrows point the way the wind is blowing; the compass point and degrees show where it comes from.
| Period | This Afternoon October 11, 2026 | Tonight October 11, 2026 | Columbus Day October 12, 2026 | Monday Night October 12, 2026 | Tuesday October 13, 2026 | Tuesday Night October 13, 2026 | Wednesday October 14, 2026 | Wednesday Night October 14, 2026 | Thursday October 15, 2026 | Thursday Night October 15, 2026 | Friday October 16, 2026 | Friday Night October 16, 2026 | Saturday October 17, 2026 | Saturday Night October 17, 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 70° | 52° | 66° | 38° | 63° | 34° | 52° | 32° | 54° | 27° | 60° | 32° | 68° | 38° |
| Wind | SSW 15 to 18 mph | SSW 20 to 31 mph | SW 12 to 22 mph | N 3 to 8 mph | W 3 to 9 mph | NNE 9 mph | NNE 6 to 9 mph | NW 5 mph | NW 6 to 9 mph | NNE 2 to 6 mph | S 5 mph | SSW 3 to 8 mph | SW 15 to 22 mph | SW 13 mph |
| Gusts | 30 mph | 50 mph | 35 mph | 16 mph | 20 mph | 20 mph | 18 mph | 13 mph | 18 mph | 14 mph | 14 mph | 14 mph | 35 mph | 25 mph |
| Precip % | 43% | 36% | 36% | 80% | 54% | 89% | 81% | 53% | 40% | 12% | 0% | 0% | 0% | 0% |
| Forecast |
No active USGS or USACE telemetry gauge is currently mapped to Alcova Reservoir. Not available from a verified source for this lake.
Poor for fishing (47/100), from 5 available inputs. Supporting this: Sky is cloudy (71% cloud cover). 25% chance of precipitation. The forecast mentions thunderstorms, which carries a risk penalty. Not available from a verified source for this lake: pressure trend, water temperature. Confidence is moderate (74%) because some inputs are unavailable or older than ideal.
Very Poor / Avoid for boating (25/100), from 4 available inputs. Supporting this: 25% chance of precipitation. Working against it: Active severe alert: High Wind Warning. High Wind Warning is in effect for this lake; the score is already below the 30 cap. The forecast mentions thunderstorms, which carries a risk penalty. Not available from a verified source for this lake: visibility and conditions, verified water access. Confidence is moderate (84%) because some inputs are unavailable or older than ideal.
Very Poor / Avoid for sailing (30/100), from 4 available inputs. Supporting this: Wind 15 mph from the SSW is in the preferred sailing range. Gusts exceed sustained wind by 9 mph, making the breeze puffy. Working against it: Active severe alert: High Wind Warning. High Wind Warning is in effect for this lake. Sailing scores are capped at 30. The forecast mentions thunderstorms, which carries a risk penalty. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Very Poor / Avoid for kayaking (28/100), from 5 available inputs. Supporting this: 25% chance of precipitation. Air temperature 65°F. Working against it: Active severe alert: High Wind Warning. High Wind Warning is in effect for this lake; the score is already below the 30 cap. The forecast mentions thunderstorms, which carries a risk penalty. Confidence is high (90%).
Water temperature is not available from a verified source for this lake. No swimming score is shown without it.
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Individual boat ramp GPS coordinates are maintained under the jurisdiction of WY Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
Alcova Reservoir is an established freshwater reservoir in WY that delivers excellent freshwater boating, fishing, and outdoor recreation. The waterbody's bathymetry and shoreline vegetation provide productive habitat for gamefish year-round. Public recreation areas and boat launch facilities are overseen by state and local natural resource agencies.
Valid freshwater sport fishing license issued by Wyoming Game and Fish Department (WGFD) is required for anglers age 14+. Digital license on mobile is accepted.
Mandatory Clean, Drain & Dry inspection. Out-of-area craft require on-site Aquatic Invasive Species (AIS Quagga/Zebra) inspection or decontamination before launch. USCG life jackets required for all.
Public shoreline and boating access managed by State & Local Authorities. Verify seasonal gate hours, launch fees, and parking rules before travel.
High-speed motorboating, pontoon cruising, wakeboarding, and water skiing across main channels. Target gamefish include Rainbow Trout, Rocky Mountain Cutthroat Trout, Lahontan Cutthroat Trout. Morning hours typically provide optimal glassy conditions for kayak and stand-up paddleboard (SUP) touring.
Warm water temperatures, peak swimming, active watersports, and open full-service campgrounds. Highest weekly attendance; plan early arrivals on summer weekends.
Spring pre-spawn and fall feeding transitions create prime trophy angling conditions. Cooler air, lower boat traffic, and vibrant seasonal shoreline foliage.
Northern cold winter conditions with freezing air temperatures and potential surface ice formation. Ramps and water systems may be winterized. Confirm open status before visiting.
No external source rows are cited by the data currently shown on this page.
Updated
Scores are heuristics, not safety guarantees. LakeRadar scores summarize available conditions and are not a substitute for official warnings, local rules, or on-water judgment.
All telemetry for Alcova Reservoir is synchronized directly from authorized federal and state monitoring networks (USGS, NWS, NOAA, and state environmental authorities). Observations are strictly instrumented readings — unmonitored sensors are transparently disclosed rather than synthetic estimates.
Last source audit: Oct 11, 1:04 PM MDT