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Ennis Lake is one of the reservoirs LakeRadar tracks in Montana. Fish documented in the area include Rainbow Trout and Brown Trout. Its recorded surface area is approximately 3,715 acres. A nearby water gauge supplies level and temperature readings where available. Coverage here includes an hourly and 7-day forecast, wind and gust outlook, water readings, fishing conditions, and activity scores for boating, paddling, and swimming. Nearby alternatives include Henrys Lake. Forecasts for Ennis Lake come from the National Weather Service and refresh several times a day.
Updated
No active alerts for this lake as of the last check (Oct 9, 12:39 AM MDT). Alerts are re-checked automatically; see the official source for updates.
Best good fishing window, averaging 81/100 across these hours. Wind 13 mph from the south. Dawn hours (06:00 local). Derived from the hourly forecast; official alerts are not forecast and are checked separately.
| Metric | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 58° | 57° | 55° | 54° | 53° | 52° | 50° | 51° | 51° | 52° | 59° | 66° | 71° | 75° | 76° | 76° | 77° | 76° | 74° | 72° | 69° | 67° | 64° | 62° |
| Wind (kts) | 12 | 13 | 13 | 13 | 13 | 11 | 11 | 14 | 16 | 20 | 23 | 24 | 24 | 26 | 27 | 27 | 27 | 24 | 22 | 22 | 21 | 18 | 19 | 18 |
| Direction | S | S | S | S | S | S | S | S | S | S | S | SW | SW | SW | SW | SW | SW | SW | SW | S | S | S | S | S |
| Gusts (kts) | 19 | 21 | 21 | 21 | 21 | 19 | 19 | 23 | 25 | 29 | 28 | 30 | 32 | 35 | 36 | 36 | 36 | 34 | 33 | 35 | 35 | 34 | 34 | 32 |
| Precip % | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 1% | 1% | 0% | 0% | 0% | 0% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Fri, 12 AM MDT | 58°F | 14 mph SSE (158°) | 22 mph | 0% | 39% | Partly Cloudy |
| Fri, 1 AM MDT | 57°F | 15 mph S (180°) | 24 mph | 0% | 55% | Mostly Cloudy |
| Fri, 2 AM MDT | 55°F | 15 mph S (180°) | 24 mph | 0% | 44% | Partly Cloudy |
| Fri, 3 AM MDT | 54°F | 15 mph S (180°) | 24 mph | 0% | 23% | Mostly Clear |
| Fri, 4 AM MDT | 53°F | 15 mph S (180°) | 24 mph | 0% | 36% | Partly Cloudy |
| Fri, 5 AM MDT | 52°F | 13 mph S (180°) | 22 mph | 0% | 21% | Mostly Clear |
| Fri, 6 AM MDT | 50°F | 13 mph S (180°) | 22 mph | 0% | 18% | Sunny |
| Fri, 7 AM MDT | 51°F | 16 mph S (180°) | 27 mph | 0% | 28% | Mostly Sunny |
| Fri, 8 AM MDT | 51°F | 18 mph S (180°) | 29 mph | 0% | 27% | Mostly Sunny |
| Fri, 9 AM MDT | 52°F | 23 mph S (180°) | 33 mph | 0% | 16% | Sunny |
| Fri, 10 AM MDT | 59°F | 26 mph S (180°) | 32 mph | 0% | 15% | Sunny |
| Fri, 11 AM MDT | 66°F | 28 mph SSW (203°) | 35 mph | 0% | 7% | Sunny |
| Fri, 12 PM MDT | 71°F | 28 mph SSW (203°) | 37 mph | 0% | 14% | Sunny |
| Fri, 1 PM MDT | 75°F | 30 mph SSW (203°) | 40 mph | 0% | 8% | Sunny |
| Fri, 2 PM MDT | 76°F | 31 mph SSW (203°) | 41 mph | 0% | 9% | Sunny |
| Fri, 3 PM MDT | 76°F | 31 mph SSW (203°) | 41 mph | 0% | 8% | Sunny |
| Fri, 4 PM MDT | 77°F | 31 mph SSW (203°) | 41 mph | 0% | 25% | Sunny |
| Fri, 5 PM MDT | 76°F | 28 mph SSW (203°) | 39 mph | 0% | 33% | Mostly Sunny |
| Fri, 6 PM MDT | 74°F | 25 mph SSW (203°) | 38 mph | 1% | 49% | Partly Cloudy |
| Fri, 7 PM MDT | 72°F | 25 mph S (180°) | 40 mph | 1% | 51% | Mostly Cloudy |
| Fri, 8 PM MDT | 69°F | 24 mph S (180°) | 40 mph | 0% | 46% | Partly Cloudy |
| Fri, 9 PM MDT | 67°F | 21 mph S (180°) | 39 mph | 0% | 47% | Partly Cloudy |
| Fri, 10 PM MDT | 64°F | 22 mph S (180°) | 39 mph | 0% | 39% | Partly Cloudy |
| Fri, 11 PM MDT | 62°F | 21 mph S (180°) | 37 mph | 0% | 44% | Partly Cloudy |
| Sat, 12 AM MDT | 59°F | 18 mph SSW (203°) | 32 mph | 2% | 61% | 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 | Overnight October 9, 2026 | Friday October 9, 2026 | Friday Night October 9, 2026 | Saturday October 10, 2026 | Saturday Night October 10, 2026 | Sunday October 11, 2026 | Sunday Night 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 49° | 78° | 48° | 60° | 30° | 33° | 28° | 45° | 31° | 51° | 34° | 52° | 33° | 50° |
| Wind | SSE 15 mph | S 13 to 31 mph | S 3 to 25 mph | NNW 2 to 10 mph | N 14 to 24 mph | NNE 8 to 12 mph | N 2 to 13 mph | N 1 mph | 0 mph | SW 1 mph | SSW 3 mph | SW 5 mph | WSW 3 to 7 mph | N 3 mph |
| Gusts | 24 mph | 41 mph | 40 mph | 21 mph | 37 mph | 18 mph | 21 mph | 7 mph | 5 mph | 8 mph | 8 mph | 13 mph | 12 mph | 8 mph |
| Precip % | 0% | 0% | 42% | 96% | 100% | 100% | 89% | 72% | 25% | 19% | 24% | 24% | 53% | 44% |
| Forecast |
No active USGS or USACE telemetry gauge is currently mapped to Ennis Lake. Not available from a verified source for this lake.
Nearby river temperature: 58.3°F at Madison River bl Ennis Lake nr McAllister MT (2.2 mi away) · Oct 9, 6:00 AM UTC
Good for fishing (84/100), from 6 available inputs. Supporting this: Wind 5 mph from the south. Measured water temperature 58°F from a representative gauge 2.2 mi away. Provisional data. Not available from a verified source for this lake: pressure trend. Confidence is moderate (78%) because some inputs are unavailable or older than ideal.
Excellent for boating (96/100), from 4 available inputs. Supporting this: Wind 5 mph from the south. Gusts to 10 mph. 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 (83/100), from 4 available inputs. Supporting this: No active official alerts for this lake. Gusts exceed sustained wind by 5 mph, making the breeze puffy. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Good for kayaking (79/100), from 5 available inputs. Supporting this: Wind 5 mph from the south. Gusts to 10 mph. Combined air and water temperature is 114°F (below the 120°F safety guideline). Thermal protection recommended for paddle craft. Confidence is high (90%).
No verified water temperature source exists for this lake, so a swimming comfort score is not shown.
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Individual boat ramp GPS coordinates are maintained under the jurisdiction of MT Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
Anchored in the heart of MT, Ennis Lake serves as a central hub for boating excursions, weekend camping, and sport fishing. The lake features varied bottom contours and shoreline cover that support diverse aquatic life. Launch ramps and recreational amenities are overseen by state and local natural resource agencies.
Valid freshwater sport fishing license issued by Montana Fish, Wildlife & Parks (FWP) is required for anglers age 12+. 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, Brown 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 Ennis Lake 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 9, 12:39 AM MDT