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Lake Shannon is a reservoir located in Washington. It covers roughly 2,190 surface acres (about 3 square miles). If you are planning a trip, Baker Lake, Diablo Lake, and Ross Lake 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 Lake Shannon.
Updated
Latest source update is older than expected. Use caution and check the official source.
The last automated check (Oct 9, 11:45 AM PDT) found no active alerts for this lake, but that check is older than LakeRadar's alert freshness window, so the current alert status could not be confirmed.
Confirm before heading out: official alerts for this area or weather.gov/alerts. LakeRadar scores summarize available conditions and are not a substitute for official warnings, local rules, or on-water judgment.
Overall Good (85/100) across 4 activities. Best right now: Sailing (91/100).
How the score is calculated →Best good fishing window, averaging 89/100 across these hours. Wind 5 mph from the west-southwest. Dusk hours (18:00 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) | 53° | 52° | 53° | 52° | 51° | 50° | 48° | 47° | 47° | 46° | 46° | 46° | 46° | 46° | 46° | 45° | 45° | 45° | 45° | 45° | 44° | 45° | 46° | 48° |
| Wind (kts) | 8 | 7 | 7 | 7 | 6 | 6 | 4 | 4 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 |
| Direction | W | W | W | W | W | W | W | SW | S | S | S | S | SW | SW | S | SW | S | S | — | — | SE | — | W | W |
| Gusts (kts) | 13 | 13 | 12 | 12 | 11 | 10 | 9 | 7 | 6 | 5 | 4 | 4 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 |
| Precip % | 22% | 17% | 12% | 5% | 3% | 7% | 12% | 27% | 35% | 50% | 61% | 64% | 57% | 49% | 61% | 47% | 61% | 26% | 25% | 13% | 9% | 6% | 4% | 5% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Fri, 12 PM PDT | 53°F | 9 mph WSW (248°) | 15 mph | 22% | 72% | Slight Chance Light Rain |
| Fri, 1 PM PDT | 52°F | 8 mph WSW (248°) | 15 mph | 17% | 61% | Slight Chance Light Rain |
| Fri, 2 PM PDT | 53°F | 8 mph WSW (248°) | 14 mph | 12% | 53% | Partly Sunny |
| Fri, 3 PM PDT | 52°F | 8 mph WSW (248°) | 14 mph | 5% | 52% | Partly Sunny |
| Fri, 4 PM PDT | 51°F | 7 mph WSW (248°) | 13 mph | 3% | 42% | Mostly Sunny |
| Fri, 5 PM PDT | 50°F | 7 mph WSW (248°) | 12 mph | 7% | 54% | Partly Sunny |
| Fri, 6 PM PDT | 48°F | 5 mph WSW (248°) | 10 mph | 12% | 51% | Mostly Cloudy |
| Fri, 7 PM PDT | 47°F | 5 mph SW (225°) | 8 mph | 27% | 69% | Chance Light Rain |
| Fri, 8 PM PDT | 47°F | 3 mph S (180°) | 7 mph | 35% | 77% | Chance Light Rain |
| Fri, 9 PM PDT | 46°F | 2 mph S (180°) | 6 mph | 50% | 79% | Chance Light Rain |
| Fri, 10 PM PDT | 46°F | 2 mph SSE (158°) | 5 mph | 61% | 77% | Light Rain Likely |
| Fri, 11 PM PDT | 46°F | 2 mph SSE (158°) | 5 mph | 64% | 76% | Light Rain Likely |
| Sat, 12 AM PDT | 46°F | 1 mph SSW (203°) | 4 mph | 57% | 80% | Light Rain Likely |
| Sat, 1 AM PDT | 46°F | 1 mph SSW (203°) | 2 mph | 49% | 77% | Chance Light Rain |
| Sat, 2 AM PDT | 46°F | 1 mph SSE (158°) | 2 mph | 61% | 81% | Light Rain Likely |
| Sat, 3 AM PDT | 45°F | 1 mph SSW (203°) | 2 mph | 47% | 75% | Chance Light Rain |
| Sat, 4 AM PDT | 45°F | 1 mph SSE (158°) | 2 mph | 61% | 74% | Light Rain Likely |
| Sat, 5 AM PDT | 45°F | 1 mph S (180°) | 2 mph | 26% | 78% | Chance Light Rain |
| Sat, 6 AM PDT | 45°F | Calm | 2 mph | 25% | 86% | Chance Light Rain |
| Sat, 7 AM PDT | 45°F | Calm | 2 mph | 13% | 89% | Cloudy |
| Sat, 8 AM PDT | 44°F | 1 mph ESE (113°) | 2 mph | 9% | 73% | Mostly Cloudy |
| Sat, 9 AM PDT | 45°F | Calm | 2 mph | 6% | 74% | Mostly Cloudy |
| Sat, 10 AM PDT | 46°F | 1 mph W (270°) | 2 mph | 4% | 72% | Mostly Cloudy |
| Sat, 11 AM PDT | 48°F | 1 mph W (270°) | 4 mph | 5% | 38% | Mostly Sunny |
| Sat, 12 PM PDT | 51°F | 2 mph WNW (293°) | 5 mph | 5% | 26% | 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 | Today 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) | 55° | 44° | 54° | 39° | 58° | 39° | 58° | 43° | 58° | 48° | 57° | 46° | 62° | 49° |
| Wind | WSW 9 mph | S 1 to 5 mph | NW 0 to 6 mph | NNE 6 to 13 mph | N 3 to 7 mph | NNE 3 to 10 mph | SSW 1 to 5 mph | NNW 1 to 5 mph | SSE 2 mph | SSE 5 mph | S 2 mph | NNE 1 to 5 mph | NE 1 to 5 mph | NE 1 to 12 mph |
| Gusts | 16 mph | 10 mph | 12 mph | 22 mph | 9 mph | 17 mph | 7 mph | 9 mph | 5 mph | 9 mph | 5 mph | 10 mph | 7 mph | 8 mph |
| Precip % | 22% | 64% | 25% | 0% | 0% | 0% | 0% | 1% | 36% | 47% | 40% | 12% | 9% | 9% |
| Forecast |
Good for fishing (79/100), from 5 available inputs. Supporting this: Wind 9 mph from the west-southwest. Sky is cloudy (72% cloud cover). 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.
Good for boating (87/100), from 4 available inputs. Supporting this: Wind 9 mph from the west-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.
Excellent for sailing (91/100), from 4 available inputs. Supporting this: Wind 9 mph from the WSW is in the preferred sailing range. No active official alerts for this lake. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Good for kayaking (85/100), from 5 available inputs. Supporting this: Wind 9 mph from the west-southwest. No active official alerts for this lake. 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 WA Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
As a core recreational asset in WA, Lake Shannon draws water enthusiasts for angling, paddling, and watersports throughout the season. Its diverse shoreline features public parks, boat launches, and scenic day-use areas overseen by state and local natural resource agencies. Please respect designated no-wake zones and wildlife preservation areas.
Valid freshwater sport fishing license issued by Washington Department of Fish and Wildlife (WDFW) is required for anglers age 15+. 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, Coho Salmon, Bull Trout, Chinook Salmon. 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 Lake Shannon 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, 12:58 PM PDT