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Anderson Ranch Reservoir is a reservoir located in Idaho.
Updated
No active alerts for this lake as of the last check (Oct 11, 1:06 PM MDT). Alerts are re-checked automatically; see the official source for updates.
Overall Good (86/100) across 4 activities. Best right now: Boating (92/100).
How the score is calculated →Best excellent fishing window, averaging 90/100 across these hours. Wind 5 mph from the north-northwest. Dawn hours (06:00 local). 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) | 51° | 51° | 51° | 49° | 50° | 47° | 45° | 45° | 45° | 44° | 43° | 42° | 40° | 39° | 39° | 38° | 36° | 35° | 33° | 32° | 36° | 40° | 42° | 44° |
| Wind (kts) | 6 | 5 | 6 | 6 | 8 | 9 | 9 | 9 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 7 | 7 | 6 | 7 | 6 | 6 | 6 | 6 |
| Direction | SW | W | W | W | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | W |
| Gusts (kts) | 10 | 9 | 10 | 10 | 13 | 16 | 16 | 15 | 16 | 14 | 15 | 12 | 11 | 10 | 10 | 11 | 13 | 12 | 11 | 12 | 9 | 10 | 9 | 10 |
| Precip % | 16% | 20% | 33% | 29% | 35% | 35% | 45% | 42% | 19% | 13% | 9% | 7% | 10% | 14% | 17% | 14% | 14% | 31% | 28% | 26% | 31% | 28% | 26% | 11% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Sun, 1 PM MDT | 51°F | 7 mph SW (225°) | 12 mph | 16% | 91% | Slight Chance Rain Showers |
| Sun, 2 PM MDT | 51°F | 6 mph WSW (248°) | 10 mph | 20% | 91% | Slight Chance Rain Showers |
| Sun, 3 PM MDT | 51°F | 7 mph WSW (248°) | 12 mph | 33% | 93% | Chance Rain Showers |
| Sun, 4 PM MDT | 49°F | 7 mph W (270°) | 12 mph | 29% | 92% | Chance Rain Showers |
| Sun, 5 PM MDT | 50°F | 9 mph W (270°) | 15 mph | 35% | 94% | Chance Rain Showers |
| Sun, 6 PM MDT | 47°F | 10 mph WNW (293°) | 18 mph | 35% | 94% | Chance Rain Showers |
| Sun, 7 PM MDT | 45°F | 10 mph WNW (293°) | 18 mph | 45% | 92% | Chance Rain Showers |
| Sun, 8 PM MDT | 45°F | 10 mph WNW (293°) | 17 mph | 42% | 88% | Chance Rain Showers |
| Sun, 9 PM MDT | 45°F | 10 mph WNW (293°) | 18 mph | 19% | 74% | Slight Chance Rain Showers |
| Sun, 10 PM MDT | 44°F | 10 mph NW (315°) | 16 mph | 13% | 60% | Mostly Cloudy |
| Sun, 11 PM MDT | 43°F | 9 mph NW (315°) | 17 mph | 9% | 47% | Partly Cloudy |
| Mon, 12 AM MDT | 42°F | 8 mph WNW (293°) | 14 mph | 7% | 49% | Partly Cloudy |
| Mon, 1 AM MDT | 40°F | 8 mph WNW (293°) | 13 mph | 10% | 63% | Mostly Cloudy |
| Mon, 2 AM MDT | 39°F | 7 mph WNW (293°) | 12 mph | 14% | 79% | Mostly Cloudy |
| Mon, 3 AM MDT | 39°F | 7 mph WNW (293°) | 12 mph | 17% | 84% | Slight Chance Rain Showers |
| Mon, 4 AM MDT | 38°F | 7 mph WNW (293°) | 13 mph | 14% | 79% | Mostly Cloudy |
| Mon, 5 AM MDT | 36°F | 8 mph NW (315°) | 15 mph | 14% | 73% | Mostly Cloudy |
| Mon, 6 AM MDT | 35°F | 8 mph NW (315°) | 14 mph | 31% | 76% | Chance Rain And Snow Showers |
| Mon, 7 AM MDT | 33°F | 7 mph WNW (293°) | 13 mph | 28% | 79% | Chance Rain And Snow Showers |
| Mon, 8 AM MDT | 32°F | 8 mph WNW (293°) | 14 mph | 26% | 85% | Chance Rain And Snow Showers |
| Mon, 9 AM MDT | 36°F | 7 mph WNW (293°) | 10 mph | 31% | 86% | Chance Rain And Snow Showers |
| Mon, 10 AM MDT | 40°F | 7 mph WNW (293°) | 12 mph | 28% | 78% | Chance Rain And Snow Showers |
| Mon, 11 AM MDT | 42°F | 7 mph WNW (293°) | 10 mph | 26% | 82% | Chance Rain And Snow Showers |
| Mon, 12 PM MDT | 44°F | 7 mph W (270°) | 12 mph | 11% | 73% | Mostly Cloudy |
| Mon, 1 PM MDT | 47°F | 8 mph W (270°) | 12 mph | 12% | 80% | Mostly Cloudy |
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) | 52° | 32° | 48° | 29° | 57° | 30° | 59° | 32° | 64° | 36° | 69° | 38° | 69° | 39° |
| Wind | WSW 6 to 9 mph | WNW 7 to 10 mph | WNW 7 to 10 mph | NW 7 to 10 mph | NW 5 to 16 mph | NNW 2 to 16 mph | WNW 2 to 8 mph | N 2 to 7 mph | SE 5 mph | ESE 3 to 8 mph | E 12 mph | E 8 to 14 mph | ESE 6 to 10 mph | NE 5 mph |
| Gusts | 15 mph | 18 mph | 15 mph | 16 mph | 24 mph | 25 mph | 15 mph | 14 mph | 12 mph | 10 mph | 23 mph | 23 mph | 14 mph | 8 mph |
| Precip % | 35% | 45% | 31% | 28% | 1% | 1% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% |
| Forecast |
Nearby river temperature: 51.8°F at SF BOISE RIVER AT ANDERSON RANCH DAM ID (2.2 mi away) · Oct 11, 6:15 PM UTC
Good for fishing (78/100), from 5 available inputs. Supporting this: Wind 7 mph from the southwest. 16% chance of precipitation. 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.
Excellent for boating (92/100), from 4 available inputs. Supporting this: Wind 7 mph from the southwest. No active official alerts for this lake. 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.
Good for sailing (88/100), from 4 available inputs. Supporting this: Wind 7 mph from the SW is workable but not ideal. No active official alerts for this lake. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Excellent for kayaking (90/100), from 5 available inputs. Supporting this: Wind 7 mph from the southwest. Gusts to 12 mph. 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 ID Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
Offering scenic water views and diverse outdoor activities, Anderson Ranch Reservoir is a premier destination in ID for boaters, anglers, and nature enthusiasts. Its waters support healthy gamefish populations alongside seasonal paddlecraft exploration. Review local launch regulations and safety guidelines before putting in for the day.
Valid freshwater sport fishing license issued by Idaho Department of Fish and Game (IDFG) 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, Mountain Whitefish, Sockeye Salmon, Smallmouth Bass. 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 Anderson Ranch 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, 1:06 PM MDT