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Lake Washington is a lake in Washington. The deepest point reaches about 214 feet, and the surface sits near 21 feet above sea level. At around 21,747 acres (about 34 square miles), it is a large waterbody. Research-grade observations nearby include Chinook Salmon, Coho Salmon, Yellow Perch, and Common Carp. Other waters in the region include Lake Washington, Lake Sammamish, and Lake Stevens. LakeRadar pulls readings from a mapped water gauge, so current water data is shown when the station reports. 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. This page combines the live forecast, wind, and conditions for Lake Washington so you can plan a visit.
Updated
Latest source update is older than expected. Use caution and check the official source.
The last automated check (Oct 8, 10:06 PM 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 (83/100) across 5 activities. Best right now: Boating (99/100).
How the score is calculated →Best good fishing window, averaging 84/100 across these hours. Wind 2 mph from the east-northeast. 0% chance of precipitation. 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) | 57° | 56° | 56° | 56° | 56° | 57° | 56° | 56° | 57° | 55° | 57° | 57° | 58° | 59° | 60° | 61° | 60° | 59° | 59° | 56° | 55° | 55° | 54° | 53° |
| Wind (kts) | 2 | 2 | 3 | 3 | 6 | 8 | 10 | 11 | 11 | 11 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Direction | NE | E | E | SE | S | S | S | S | SW | SW | N | NE | N | N | NE | NE | NE | E | E | E | E | SE | SE | SE |
| Gusts (kts) | 3 | 4 | 5 | 5 | 9 | 12 | 14 | 16 | 18 | 17 | 16 | 13 | 11 | 10 | 9 | 9 | 8 | 7 | 6 | 6 | 6 | 7 | 7 | 7 |
| Precip % | 0% | 0% | 0% | 1% | 1% | 2% | 26% | 42% | 69% | 85% | 62% | 30% | 50% | 54% | 44% | 33% | 28% | 19% | 15% | 18% | 37% | 36% | 40% | 47% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Thu, 11 PM PDT | 57°F | 2 mph NE (45°) | 4 mph | 0% | 63% | Mostly Cloudy |
| Fri, 12 AM PDT | 56°F | 2 mph ENE (68°) | 5 mph | 0% | 54% | Mostly Cloudy |
| Fri, 1 AM PDT | 56°F | 3 mph E (90°) | 6 mph | 0% | 71% | Mostly Cloudy |
| Fri, 2 AM PDT | 56°F | 3 mph SE (135°) | 6 mph | 1% | 63% | Mostly Cloudy |
| Fri, 3 AM PDT | 56°F | 7 mph SSE (158°) | 10 mph | 1% | 82% | Mostly Cloudy |
| Fri, 4 AM PDT | 57°F | 9 mph S (180°) | 14 mph | 2% | 91% | Cloudy |
| Fri, 5 AM PDT | 56°F | 12 mph S (180°) | 16 mph | 26% | 92% | Chance Light Rain |
| Fri, 6 AM PDT | 56°F | 13 mph S (180°) | 18 mph | 42% | 90% | Chance Light Rain |
| Fri, 7 AM PDT | 57°F | 13 mph SSW (203°) | 21 mph | 69% | 96% | Light Rain Likely |
| Fri, 8 AM PDT | 55°F | 13 mph SSW (203°) | 20 mph | 85% | 95% | Light Rain |
| Fri, 9 AM PDT | 57°F | 7 mph N (0°) | 18 mph | 62% | 94% | Light Rain Likely |
| Fri, 10 AM PDT | 57°F | 7 mph NE (45°) | 15 mph | 30% | 92% | Chance Light Rain |
| Fri, 11 AM PDT | 58°F | 7 mph N (0°) | 13 mph | 50% | 75% | Chance Light Rain |
| Fri, 12 PM PDT | 59°F | 6 mph N (0°) | 12 mph | 54% | 69% | Chance Light Rain |
| Fri, 1 PM PDT | 60°F | 6 mph NE (45°) | 10 mph | 44% | 68% | Chance Light Rain |
| Fri, 2 PM PDT | 61°F | 5 mph NE (45°) | 10 mph | 33% | 80% | Chance Light Rain |
| Fri, 3 PM PDT | 60°F | 5 mph NE (45°) | 9 mph | 28% | 74% | Chance Light Rain |
| Fri, 4 PM PDT | 59°F | 3 mph ENE (68°) | 8 mph | 19% | 80% | Slight Chance Light Rain |
| Fri, 5 PM PDT | 59°F | 3 mph ENE (68°) | 7 mph | 15% | 84% | Slight Chance Light Rain |
| Fri, 6 PM PDT | 56°F | 3 mph ENE (68°) | 7 mph | 18% | 84% | Slight Chance Light Rain |
| Fri, 7 PM PDT | 55°F | 3 mph ENE (68°) | 7 mph | 37% | 84% | Chance Light Rain |
| Fri, 8 PM PDT | 55°F | 3 mph ESE (113°) | 8 mph | 36% | 81% | Chance Light Rain |
| Fri, 9 PM PDT | 54°F | 3 mph ESE (113°) | 8 mph | 40% | 81% | Chance Light Rain |
| Fri, 10 PM PDT | 53°F | 3 mph ESE (113°) | 8 mph | 47% | 81% | Chance Light Rain |
| Fri, 11 PM PDT | 53°F | 6 mph SE (135°) | 9 mph | 30% | 88% | Chance Light Rain |
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 8, 2026 | Tonight October 8, 2026 | Tonight October 8, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 69° | 54° | 54° | 62° | 48° | 59° | 46° | 61° | 43° | 63° | 46° | 62° | 50° | 62° |
| Wind | NW 2 mph | ENE 1 to 12 mph | ESE 1 to 12 mph | NE 3 to 13 mph | ESE 6 mph | ESE 1 to 7 mph | N 2 to 7 mph | N 3 to 8 mph | NNE 1 to 7 mph | NNE 2 mph | E 2 mph | S 3 mph | S 2 to 6 mph | E 5 mph |
| Gusts | 4 mph | 16 mph | 16 mph | 21 mph | 9 mph | 10 mph | 10 mph | 13 mph | 10 mph | 2 mph | 2 mph | 5 mph | 8 mph | 6 mph |
| Precip % | 0% | 26% | 26% | 85% | 47% | 18% | 1% | 0% | 0% | 1% | 16% | 50% | 50% | 19% |
| Forecast |
Nearby river temperature: 58.6°F at DUWAMISH RIVER AT GOLF COURSE AT TUKWILA, WA (10.4 mi away) · Oct 9, 5:45 AM UTC
Good for fishing (86/100), from 6 available inputs. Supporting this: Measured water temperature 58°F from a representative gauge 10.4 mi away. Provisional data. Wind 1 mph from the west-northwest. 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 (99/100), from 4 available inputs. Supporting this: Wind 1 mph from the west-northwest. 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 (67/100), from 4 available inputs. Supporting this: Gusts are within 1 mph of sustained wind, so the breeze is steady. No active official alerts for this lake. Working against it: Wind 1 mph is light; expect limited sailing. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Excellent for kayaking (99/100), from 5 available inputs. Supporting this: Wind 1 mph from the west-northwest. Gusts to 2 mph. 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 WA Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
Lake Washington stands as a well-regarded freshwater lake in WA, recognized for its rich fishery and accessible open-water recreation. The waterbody offers excellent conditions for troll fishing, drift casting, and pleasure boating. Shoreline access points and public park amenities are overseen by state and local natural resource agencies.
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 Chinook Salmon, Coho Salmon, Yellow Perch, Common Carp. 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 Washington 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 8, 11:38 PM PDT