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Cottage Grove Lake is a reservoir located in Oregon. Fish documented in the area include Largemouth Bass, Smallmouth Bass, Yellow Perch, and Bluegill. It covers roughly 1,150 surface acres (about 2 square miles). The deepest point reaches about 70 feet, and the surface sits near 791 feet above sea level. LakeRadar pulls readings from a mapped water gauge, so current water data is shown when the station reports. For this location, LakeRadar tracks an hourly and 7-day forecast, wind and gust outlook, water readings, fishing conditions, and activity scores for boating, paddling, and swimming. Other waters in the region include Cottage Grove Lake, Dorena Reservoir, and Dorena Lake. Use the conditions and forecast on this page to decide when to go boating, fishing, or paddling at Cottage Grove Lake.
Updated
No active alerts for this lake as of the last check (Oct 9, 12:23 AM PDT). Alerts are re-checked automatically; see the official source for updates.
Best excellent fishing window, averaging 92/100 across these hours. Measured water temperature 66°F from a representative gauge 1.6 mi away. Provisional data. Wind 3 mph from the north. Derived from the hourly forecast; official alerts are not forecast and are checked separately.
| Metric | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 53° | 52° | 50° | 49° | 48° | 47° | 47° | 47° | 47° | 49° | 52° | 58° | 61° | 64° | 67° | 66° | 64° | 62° | 57° | 53° | 51° | 49° | 46° | 45° |
| Wind (kts) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 4 | 4 | 3 | 4 | 5 | 6 | 6 |
| Direction | — | — | — | — | — | — | — | — | — | — | N | N | N | N | NW | NW | N | N | N | N | N | N | N | N |
| Gusts (kts) | 3 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 4 | 4 | 4 | 4 | 5 | 8 | 11 | 12 | 11 | 11 | 12 | 15 | 17 | 17 |
| Precip % | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 1% | 2% | 3% | 5% | 9% | 23% | 25% | 32% | 17% | 9% | 4% | 2% | 1% | 0% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Fri, 12 AM PDT | 53°F | Calm | 4 mph | 0% | 3% | Clear |
| Fri, 1 AM PDT | 52°F | Calm | 2 mph | 0% | 5% | Clear |
| Fri, 2 AM PDT | 50°F | Calm | 4 mph | 0% | 9% | Mostly Clear |
| Fri, 3 AM PDT | 49°F | Calm | 2 mph | 0% | 17% | Mostly Clear |
| Fri, 4 AM PDT | 48°F | Calm | 2 mph | 0% | 12% | Mostly Clear |
| Fri, 5 AM PDT | 47°F | Calm | 2 mph | 0% | 20% | Patchy Fog |
| Fri, 6 AM PDT | 47°F | Calm | 2 mph | 0% | 42% | Areas Of Fog |
| Fri, 7 AM PDT | 47°F | Calm | 2 mph | 0% | 52% | Areas Of Fog |
| Fri, 8 AM PDT | 47°F | Calm | 2 mph | 0% | 58% | Areas Of Fog |
| Fri, 9 AM PDT | 49°F | Calm | 4 mph | 0% | 52% | Areas Of Fog |
| Fri, 10 AM PDT | 52°F | 1 mph NNW (338°) | 5 mph | 1% | 67% | Patchy Fog |
| Fri, 11 AM PDT | 58°F | 1 mph N (0°) | 5 mph | 2% | 63% | Partly Sunny |
| Fri, 12 PM PDT | 61°F | 1 mph NNW (338°) | 5 mph | 3% | 66% | Partly Sunny |
| Fri, 1 PM PDT | 64°F | 1 mph NNW (338°) | 5 mph | 5% | 61% | Partly Sunny |
| Fri, 2 PM PDT | 67°F | 2 mph NW (315°) | 6 mph | 9% | 59% | Partly Sunny |
| Fri, 3 PM PDT | 66°F | 2 mph NW (315°) | 9 mph | 23% | 88% | Slight Chance Light Rain |
| Fri, 4 PM PDT | 64°F | 3 mph NNW (338°) | 13 mph | 25% | 85% | Chance Light Rain |
| Fri, 5 PM PDT | 62°F | 5 mph N (0°) | 14 mph | 32% | 89% | Chance Light Rain |
| Fri, 6 PM PDT | 57°F | 5 mph N (0°) | 13 mph | 17% | 84% | Slight Chance Light Rain |
| Fri, 7 PM PDT | 53°F | 3 mph N (0°) | 13 mph | 9% | 77% | Mostly Cloudy |
| Fri, 8 PM PDT | 51°F | 5 mph N (0°) | 14 mph | 4% | 77% | Mostly Cloudy |
| Fri, 9 PM PDT | 49°F | 6 mph N (0°) | 17 mph | 2% | 56% | Mostly Cloudy |
| Fri, 10 PM PDT | 46°F | 7 mph N (0°) | 20 mph | 1% | 57% | Mostly Cloudy |
| Fri, 11 PM PDT | 45°F | 7 mph N (0°) | 20 mph | 0% | 25% | Mostly Clear |
| Sat, 12 AM PDT | 43°F | 5 mph NNE (23°) | 15 mph | 0% | 27% | Partly 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) | 47° | 68° | 37° | 60° | 35° | 63° | 34° | 66° | 37° | 67° | 43° | 68° | 42° | 74° |
| Wind | 0 mph | NNW 0 to 5 mph | NNE 1 to 7 mph | NE 3 mph | NNE 3 mph | NNE 2 to 9 mph | NE 2 to 9 mph | NNE 3 mph | ENE 2 mph | SW 2 mph | SSW 1 mph | WSW 2 mph | NE 2 mph | NNE 2 mph |
| Gusts | 4 mph | 14 mph | 20 mph | 10 mph | 10 mph | 22 mph | 22 mph | 8 mph | 8 mph | 6 mph | 6 mph | 7 mph | 7 mph | 5 mph |
| Precip % | 0% | 32% | 17% | 6% | 3% | 0% | 1% | 1% | 13% | 13% | 24% | 24% | 4% | 2% |
| Forecast |
COAST FORK WILLAMETTE R BLW COTTAGE GROVE DAM, OR · Oct 8, 10:20 PM UTC
Excellent for fishing (92/100), from 6 available inputs. Supporting this: Measured water temperature 65°F from a representative gauge 1.6 mi away. Provisional data. Wind 0 mph from the north-northeast. Not available from a verified source for this lake: pressure trend. Confidence is moderate (82%) because some inputs are unavailable or older than ideal.
Excellent for boating (100/100), from 4 available inputs. Supporting this: Wind 0 mph from the north-northeast. Gusts to 2 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.
Fair for sailing (63/100), from 4 available inputs. Supporting this: Gusts are within 2 mph of sustained wind, so the breeze is steady. No active official alerts for this lake. Working against it: Wind 0 mph is light; expect limited sailing. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Good for kayaking (83/100), from 5 available inputs. Supporting this: Wind 0 mph from the north-northeast. Gusts to 2 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%).
Surface water measured at 66°F. Air and water contrast evaluate recreational immersion comfort.
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Individual boat ramp GPS coordinates are maintained under the jurisdiction of OR Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
In OR, Cottage Grove Lake stands as a valued freshwater reservoir offering scenic outdoor recreation and critical regional water resources. Visitors enjoy powerboating, sailing, and tranquil shoreline fishing across its varied channels. Check state agency updates for current fishing creel limits and aquatic species inspections.
Valid freshwater sport fishing license issued by Oregon Department of Fish and Wildlife (ODFW) 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 Largemouth Bass, Smallmouth Bass, Yellow Perch, Bluegill. 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.
Mild year-round outdoor climate. Uncrowded waters, active winter bass and crappie fishing, and open year-round boat launch access.
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 Cottage Grove 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, 12:23 AM PDT