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Cottage Grove Lake is a reservoir located in Oregon. The water surface spans about 1,150 acres, making it a mid-sized body of water. If you are planning a trip, Cottage Grove Lake, Dorena Reservoir, and Fern Ridge Reservoir are also nearby. Below you will find an hourly and 7-day forecast, wind and gust outlook, and activity scores for boating, paddling, and swimming. Check the hourly forecast and activity outlook below before heading out to Cottage Grove Lake.
Updated
Alerts are published by official agencies and shown verbatim. View the official alert source.
Frost Advisory issued October 9 at 10:37AM PDT until October 11 at 9:00AM PDT by NWS Portland OR
Overall Good (78/100) across 5 activities. Best right now: Fishing (89/100).
How the score is calculated →Best excellent fishing window, averaging 93/100 across these hours. Measured water temperature 66°F from a representative gauge 0.0 mi away. Provisional data. Wind 2 mph from the north. Derived from the hourly forecast; official alerts are not forecast and are checked separately.
| Metric | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 61° | 57° | 52° | 50° | 48° | 46° | 44° | 43° | 41° | 40° | 39° | 38° | 37° | 37° | 37° | 37° | 40° | 45° | 49° | 53° | 56° | 57° | 58° | 58° |
| Wind (kts) | 4 | 4 | 3 | 4 | 5 | 5 | 5 | 4 | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 2 | 3 | 3 | 3 |
| Direction | N | N | N | N | N | N | N | N | N | NE | NE | — | — | — | — | — | — | NE | N | N | N | N | N | N |
| Gusts (kts) | 12 | 12 | 11 | 12 | 15 | 16 | 15 | 12 | 9 | 7 | 5 | 4 | 3 | 3 | 3 | 3 | 3 | 4 | 5 | 6 | 8 | 9 | 9 | 9 |
| Precip % | 28% | 14% | 5% | 1% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 1% | 1% | 1% | 2% | 4% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Fri, 5 PM PDT | 61°F | 5 mph NNW (338°) | 14 mph | 28% | 88% | Chance Rain Showers |
| Fri, 6 PM PDT | 57°F | 5 mph N (0°) | 14 mph | 14% | 90% | Cloudy |
| Fri, 7 PM PDT | 52°F | 3 mph N (0°) | 13 mph | 5% | 83% | Mostly Cloudy |
| Fri, 8 PM PDT | 50°F | 5 mph N (0°) | 14 mph | 1% | 79% | Mostly Cloudy |
| Fri, 9 PM PDT | 48°F | 6 mph N (0°) | 17 mph | 0% | 72% | Mostly Cloudy |
| Fri, 10 PM PDT | 46°F | 6 mph N (0°) | 18 mph | 0% | 67% | Mostly Cloudy |
| Fri, 11 PM PDT | 44°F | 6 mph N (0°) | 17 mph | 0% | 57% | Mostly Cloudy |
| Sat, 12 AM PDT | 43°F | 5 mph N (0°) | 14 mph | 0% | 47% | Partly Cloudy |
| Sat, 1 AM PDT | 41°F | 3 mph N (0°) | 10 mph | 0% | 51% | Mostly Cloudy |
| Sat, 2 AM PDT | 40°F | 1 mph NNE (23°) | 8 mph | 0% | 21% | Patchy Fog |
| Sat, 3 AM PDT | 39°F | 1 mph NNE (23°) | 6 mph | 0% | 27% | Patchy Fog |
| Sat, 4 AM PDT | 38°F | Calm | 5 mph | 0% | 31% | Areas Of Fog |
| Sat, 5 AM PDT | 37°F | Calm | 4 mph | 0% | 32% | Areas Of Fog |
| Sat, 6 AM PDT | 37°F | Calm | 4 mph | 0% | 33% | Areas Of Fog |
| Sat, 7 AM PDT | 37°F | Calm | 4 mph | 0% | 43% | Areas Of Fog |
| Sat, 8 AM PDT | 37°F | Calm | 4 mph | 0% | 47% | Areas Of Fog |
| Sat, 9 AM PDT | 40°F | Calm | 4 mph | 0% | 38% | Patchy Fog |
| Sat, 10 AM PDT | 45°F | 1 mph NNE (23°) | 5 mph | 0% | 40% | Mostly Sunny |
| Sat, 11 AM PDT | 49°F | 1 mph N (0°) | 6 mph | 0% | 41% | Mostly Sunny |
| Sat, 12 PM PDT | 53°F | 2 mph N (0°) | 7 mph | 1% | 29% | Mostly Sunny |
| Sat, 1 PM PDT | 56°F | 2 mph N (0°) | 9 mph | 1% | 29% | Mostly Sunny |
| Sat, 2 PM PDT | 57°F | 3 mph N (0°) | 10 mph | 1% | 31% | Mostly Sunny |
| Sat, 3 PM PDT | 58°F | 3 mph N (0°) | 10 mph | 2% | 46% | Mostly Sunny |
| Sat, 4 PM PDT | 58°F | 3 mph N (0°) | 10 mph | 4% | 44% | Mostly Sunny |
| Sat, 5 PM PDT | 59°F | 2 mph N (0°) | 10 mph | 2% | 48% | Mostly Sunny |
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 9, 2026 | Tonight 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 | Thursday Night October 15, 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 68° | 37° | 60° | 35° | 64° | 34° | 66° | 36° | 69° | 42° | 71° | 42° | 75° | 44° |
| Wind | NNW 5 mph | NNE 0 to 6 mph | NE 0 to 3 mph | NNE 2 mph | NE 2 to 9 mph | NE 2 to 9 mph | NE 3 mph | NE 0 to 3 mph | NW 1 mph | NNW 1 mph | NNW 2 mph | N 2 mph | N 2 mph | E 1 mph |
| Gusts | 14 mph | 18 mph | 10 mph | 10 mph | 23 mph | 23 mph | 10 mph | 10 mph | 6 mph | 6 mph | 7 mph | 7 mph | 7 mph | 7 mph |
| Precip % | 28% | 14% | 4% | 1% | 0% | 0% | 0% | 1% | 5% | 15% | 7% | 2% | 2% | 2% |
| Forecast |
COAST FORK WILLAMETTE R BLW COTTAGE GROVE DAM, OR · Oct 9, 1:20 AM UTC
Good for fishing (89/100), from 6 available inputs. Supporting this: Measured water temperature 66°F from a representative gauge 0.0 mi away. Provisional data. Wind 5 mph from the north-northwest. Not available from a verified source for this lake: pressure trend. Confidence is moderate (72%) because some inputs are unavailable or older than ideal.
Good for boating (80/100), from 4 available inputs. Supporting this: Wind 5 mph from the north-northwest. Gusts to 14 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 (68/100), from 4 available inputs. Supporting this: Gusts exceed sustained wind by 9 mph, making the breeze puffy. 28% chance of precipitation. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Good for kayaking (82/100), from 5 available inputs. Supporting this: Wind 5 mph from the north-northwest. Gusts to 14 mph. 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.
Cottage Grove Lake is a popular freshwater reservoir located in OR, providing great recreation for boaters, kayakers, and outdoor travelers. With public access points distributed along the water's edge, launching a boat or paddleboard is straightforward and convenient. Facilities and day-use grounds are overseen by state and local natural resource agencies.
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, Bluegill, Rainbow 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.
Mild year-round outdoor climate. Uncrowded waters, active winter bass and crappie fishing, and open year-round boat launch access.
NWS API Web Service · License: U.S. Government work · Attribution: Data provided by the National Weather Service (api.weather.gov)
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, 5:15 PM PDT