Loading page content…
Loading page content…
Loading lake conditions…
Official National Weather Service (NWS) point forecast and real-time wind conditions for Lake Washington (Washington). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 60°F · Low 54°F
Peak gusts: 12 mph · Lake surface chop expected
Humidity: 91% · Barometer: 29.95 inHg
USGS water monitoring available for Lake Washington.
Excellent for boating (91/100), from 4 available inputs. Supporting this: Wind 8 mph from the south. 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.
Good for fishing (85/100), from 5 available inputs. Supporting this: Wind 8 mph from the south. 1% chance of precipitation. 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 kayaking (89/100), from 5 available inputs. Supporting this: Wind 8 mph from the south. 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. Supporting this: No active official alerts for this lake. 1% chance of precipitation. Working against it: Air temperature 56°F. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 4 AM | 56°F | 8 mph | S | ⚡ 14 mph | 1% | Cloudy |
| 5 AM | 56°F | 10 mph | S | ⚡ 15 mph | 17% | Slight Chance Light Rain |
| 6 AM | 56°F | 12 mph | S | ⚡ 18 mph | 41% | Chance Light Rain |
| 7 AM | 55°F | 13 mph | SW | ⚡ 20 mph | 79% | Light Rain |
| 8 AM | 57°F | 13 mph | SW | ⚡ 20 mph | 64% | Light Rain Likely |
| 9 AM | 57°F | 10 mph | SW | ⚡ 18 mph | 56% | Light Rain Likely |
| 10 AM | 57°F | 8 mph | W | ⚡ 15 mph | 37% | Chance Light Rain |
| 11 AM | 58°F | 6 mph | N | ⚡ 12 mph | 49% | Chance Light Rain |
| 12 PM | 59°F | 6 mph | N | ⚡ 12 mph | 59% | Light Rain Likely |
| 1 PM | 59°F | 6 mph | N | ⚡ 10 mph | 58% | Light Rain Likely |
| 2 PM | 60°F | 5 mph | NE | ⚡ 10 mph | 32% | Chance Light Rain |
| 3 PM | 59°F | 5 mph | NE | ⚡ 9 mph | 26% | Chance Light Rain |
| 4 PM | 59°F | 3 mph | NE | ⚡ 8 mph | 29% | Chance Light Rain |
| 5 PM | 58°F | 3 mph | NE | ⚡ 7 mph | 36% | Chance Light Rain |
| 6 PM | 56°F | 3 mph | E | ⚡ 7 mph | 33% | Chance Light Rain |
| 7 PM | 55°F | 3 mph | E | ⚡ 7 mph | 28% | Chance Light Rain |
| 8 PM | 54°F | 3 mph | E | ⚡ 7 mph | 32% | Chance Light Rain |
| 9 PM | 54°F | 3 mph | E | ⚡ 7 mph | 31% | Chance Light Rain |
| 10 PM | 53°F | 5 mph | E | ⚡ 7 mph | 23% | Slight Chance Light Rain |
| 11 PM | 53°F | 5 mph | SE | ⚡ 8 mph | 12% | Mostly Cloudy |
| 12 AM | 52°F | 5 mph | S | ⚡ 8 mph | 13% | Partly Cloudy |
| 1 AM | 51°F | 5 mph | S | ⚡ 8 mph | 17% | Slight Chance Light Rain |
| 2 AM | 51°F | 5 mph | S | ⚡ 8 mph | 15% | Slight Chance Light Rain |
| 3 AM | 50°F | 5 mph | S | ⚡ 8 mph | 11% | Partly Cloudy |
Mirror-like to gentle rippled water. Optimal conditions for paddleboarding, kayaking, swimming, and beginner water skiing or wakeboarding.
Pleasant breeze with small wavelets. Great for sailing, pleasure cruising, pontoon boats, and trolling for trout and bass.
Moderate waves with whitecaps likely. Requires skilled boat handling; kayaks, canoes, and stand-up paddleboards should stay close to sheltered bays.
Steep waves, cold spray, and hazardous open water. Avoid small craft voyages. Always check official National Weather Service lake wind advisories.
A slight chance of rain after 5am. Mostly cloudy. Low around 54, with temperatures rising to around 56 overnight. South southeast wind 2 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Rain. Mostly cloudy. High near 61, with temperatures falling to around 58 in the afternoon. Northwest wind 3 to 13 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain before 5am. Mostly cloudy, with a low around 48. East southeast wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Partly sunny, with a high near 59. East northeast wind 2 to 7 mph.
Mostly clear, with a low around 46. North wind 2 to 7 mph.
Sunny, with a high near 61.
Clear, with a low around 43.
Sunny, with a high near 63.
Partly cloudy, with a low around 46.
A slight chance of rain after 5pm. Partly sunny, with a high near 61.
A chance of rain. Mostly cloudy, with a low around 51.
A chance of rain before 5pm. Mostly cloudy, with a high near 62.
Partly cloudy, with a low around 49.
Mostly sunny, with a high near 64.
Lake Washington currently reports 55°F with wind velocity near 9 mph from the S. Atmospheric forecasts and 24-hour hour-by-hour wind timelines are updated hourly from the National Weather Service gridpoint matching the lake's coordinates.
At Lake Washington and surrounding mountain valleys, diurnal heating of the surrounding terrain causes strong thermal pressure differentials known locally as afternoon breezes (such as the Washoe Zephyr at Lake Tahoe). Wind speeds typically peak between 1:00 PM and 5:00 PM before calming near sunset.
For stand-up paddleboarding (SUP), canoeing, and light kayaks, winds under 7 mph (light breeze) offer the safest, glassiest surface conditions. Between 8–14 mph, small wavelets develop, suitable for sailboats and powerboats. Winds exceeding 15 mph create steep whitecaps and rapid drift; winds over 21 mph warrant small craft warnings.
All weather and wind telemetry is fetched directly from the National Weather Service (NOAA - WFO SEW) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Lake Washington without artificial smoothing or third-party estimates.
Yes. Live hydrological sensor readings, 30-day elevation histories, full-pool benchmarks, and USGS station provenance are available on our dedicated Lake Washington Water Level & Temperature page.
View Lake Washington Water Level & Temperature →