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Lake Washington is a lake in Washington. It covers roughly 21,747 surface acres (about 34 square miles). Nearby alternatives include Lake Washington, Lake Sammamish, and American Lake. 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 Washington.
Updated
Latest source update is older than expected. Use caution and check the official source.
The last automated check (Oct 9, 12:31 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 (84/100) across 5 activities. Best right now: Boating (99/100).
How the score is calculated →Best excellent fishing window, averaging 92/100 across these hours. Wind 8 mph from the north. Dusk hours (18:00 local). Derived from the hourly forecast; official alerts are not forecast and are checked separately.
| Metric | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 57° | 57° | 57° | 57° | 57° | 57° | 56° | 58° | 58° | 58° | 59° | 59° | 60° | 60° | 59° | 59° | 59° | 57° | 56° | 56° | 55° | 55° | 54° | 53° |
| Wind (kts) | 2 | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 7 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 4 | 4 | 4 | 5 |
| Direction | E | S | S | S | S | S | SW | SW | SW | S | N | N | NE | NE | NE | NE | NE | E | E | E | E | E | SE | S |
| Gusts (kts) | 4 | 6 | 10 | 12 | 14 | 16 | 18 | 18 | 16 | 13 | 10 | 10 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 7 | 7 | 8 |
| Precip % | 0% | 0% | 1% | 1% | 17% | 39% | 78% | 65% | 56% | 37% | 50% | 60% | 59% | 32% | 26% | 29% | 36% | 32% | 27% | 31% | 29% | 21% | 11% | 12% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Fri, 1 AM PDT | 57°F | 2 mph E (90°) | 5 mph | 0% | 59% | Mostly Cloudy |
| Fri, 2 AM PDT | 57°F | 5 mph SSE (158°) | 7 mph | 0% | 64% | Mostly Cloudy |
| Fri, 3 AM PDT | 57°F | 7 mph S (180°) | 12 mph | 1% | 84% | Mostly Cloudy |
| Fri, 4 AM PDT | 57°F | 9 mph S (180°) | 14 mph | 1% | 89% | Cloudy |
| Fri, 5 AM PDT | 57°F | 10 mph S (180°) | 16 mph | 17% | 91% | Slight Chance Light Rain |
| Fri, 6 AM PDT | 57°F | 12 mph S (180°) | 18 mph | 39% | 89% | Chance Light Rain |
| Fri, 7 AM PDT | 56°F | 13 mph SSW (203°) | 21 mph | 78% | 94% | Light Rain |
| Fri, 8 AM PDT | 58°F | 13 mph SW (225°) | 21 mph | 65% | 94% | Light Rain Likely |
| Fri, 9 AM PDT | 58°F | 12 mph SW (225°) | 18 mph | 56% | 91% | Light Rain Likely |
| Fri, 10 AM PDT | 58°F | 8 mph S (180°) | 15 mph | 37% | 83% | Chance Light Rain |
| Fri, 11 AM PDT | 59°F | 6 mph N (0°) | 12 mph | 50% | 67% | Chance Light Rain |
| Fri, 12 PM PDT | 59°F | 6 mph N (0°) | 12 mph | 60% | 73% | Light Rain Likely |
| Fri, 1 PM PDT | 60°F | 6 mph NNE (23°) | 10 mph | 59% | 73% | Light Rain Likely |
| Fri, 2 PM PDT | 60°F | 5 mph NNE (23°) | 9 mph | 32% | 65% | Chance Light Rain |
| Fri, 3 PM PDT | 59°F | 5 mph NNE (23°) | 9 mph | 26% | 82% | Chance Light Rain |
| Fri, 4 PM PDT | 59°F | 5 mph NE (45°) | 8 mph | 29% | 82% | Chance Light Rain |
| Fri, 5 PM PDT | 59°F | 5 mph NE (45°) | 8 mph | 36% | 79% | Chance Light Rain |
| Fri, 6 PM PDT | 57°F | 3 mph ENE (68°) | 7 mph | 32% | 78% | Chance Light Rain |
| Fri, 7 PM PDT | 56°F | 3 mph E (90°) | 7 mph | 27% | 81% | Chance Light Rain |
| Fri, 8 PM PDT | 56°F | 3 mph E (90°) | 7 mph | 31% | 80% | Chance Light Rain |
| Fri, 9 PM PDT | 55°F | 5 mph E (90°) | 7 mph | 29% | 82% | Chance Light Rain |
| Fri, 10 PM PDT | 55°F | 5 mph E (90°) | 8 mph | 21% | 70% | Slight Chance Light Rain |
| Fri, 11 PM PDT | 54°F | 5 mph ESE (113°) | 8 mph | 11% | 59% | Mostly Cloudy |
| Sat, 12 AM PDT | 53°F | 6 mph SSE (158°) | 9 mph | 12% | 35% | Partly Cloudy |
| Sat, 1 AM PDT | 52°F | 6 mph SSE (158°) | 8 mph | 15% | 37% | Slight 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 | Today October 8, 2026 | This Afternoon October 8, 2026 | Tonight October 8, 2026 | Tonight October 8, 2026 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 70° | 70° | 55° | 55° | 55° | 62° | 49° | 60° | 47° | 62° | 45° | 64° | 47° | 62° |
| Wind | NNW 2 mph | NW 2 mph | ENE 1 to 12 mph | ESE 2 to 12 mph | SE 2 to 10 mph | ESE 5 to 13 mph | SE 6 mph | ENE 2 to 8 mph | N 2 to 8 mph | N 5 to 9 mph | NNE 1 to 7 mph | NNE 2 mph | E 2 mph | S 3 mph |
| Gusts | — | 4 mph | 17 mph | 17 mph | 16 mph | 21 mph | 9 mph | 12 mph | 12 mph | 14 mph | 12 mph | 4 mph | 4 mph | 5 mph |
| Precip % | 1% | 0% | 25% | 25% | 17% | 78% | 32% | 9% | 0% | 0% | 0% | 0% | 2% | 19% |
| Forecast |
Nearby river temperature: 58.5°F at DUWAMISH RIVER AT GOLF COURSE AT TUKWILA, WA (9.7 mi away) · Oct 9, 7:45 AM UTC
Good for fishing (87/100), from 6 available inputs. Supporting this: Wind 2 mph from the west-northwest. Measured water temperature 58°F from a representative gauge 9.7 mi away. Provisional data. 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 2 mph from the west-northwest. Gusts to 4 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 (71/100), 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 2 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 2 mph from the west-northwest. Gusts to 4 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.
Located in WA, Lake Washington is a prominent freshwater lake known for its freshwater recreation and accessible shoreline. From open-water cruising and watersports to morning kayak tours, the lake attracts visitors throughout the warmer months. Managing stewardship is overseen by state and local natural resource agencies, ensuring sustainable multi-use access.
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 Coho Salmon, Pumpkinseed Sunfish, Common Carp, Yellow Perch. 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 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 9, 1:08 AM PDT