Lake Washington, WA

Today’s Forecast:

Today’s Report:

About Lake Washington

Lake Washington is a Washington destination for boating, paddling, beaches, shoreline parks, and long cycling routes around a large urban lake.

Make the Most of a Lake Washington Day

Check wind direction, cold-water conditions, boat traffic, and crossing distance before launching. Shoreline trails offer a useful backup when open water becomes choppy.

Weather Tips for Lake Washington

• Check rain timing, wind, visibility, temperature, and local access before choosing the day’s route.
• Cold water, waves, current, wind, and lightning should guide water plans more than sunshine alone.
• After steady rain, favor paved or well-drained surfaces until natural trails recover.
• Summer smoke, winter access, shoulder-season closures, and shorter fall daylight can matter even during an otherwise mild forecast.

Nearby Towns and Areas

This page can also be useful when planning outdoor time near:

• Kirkland
• Mercer Island
• Seward Park
• Juanita Beach
• Magnuson Park
• Gene Coulon Park
• Burke-Gilman Trail

Plan Around the Conditions

Use the forecast to choose the best version of a Lake Washington day. Match wind, precipitation, smoke, water conditions, trail surfaces, road access, temperature, and daylight to the activity that gives your group the safest and most comfortable plan.

7-Day Forecast for Lake Washington

Lake Washington Weather by Season

Winter

Winter at Lake Washington is cool and wet west of the Cascades, with occasional lowland snow or ice. Shaded roads, bridges, docks, and trails can remain slick after other surfaces clear.

Spring

Spring around Lake Washington brings changing conditions, rising rivers, wet trails, and lingering mountain snow. Cold water from rain and snowmelt remains a major planning factor. Mountain and eastern thunderstorms become increasingly possible later in the season.

Summer

Summer at Lake Washington is usually the driest and most dependable season, but wildfire smoke, fire restrictions, heat, and afternoon thunderstorms can interrupt plans. Use calmer mornings for boating or paddling and keep a shore-based backup. Dry vegetation makes local fire rules especially important.

Fall

Fall at Lake Washington brings cooler temperatures, shorter daylight, changing color, and the return of wetter weather west of the Cascades. Water cools faster than the air, increasing cold-water consequences. Check seasonal facility hours and allow extra time on busy event or salmon-viewing weekends.

Key Climate Data Points

• Annual average temperature: around 52°F, using the relevant local or regional elevation context.
• Annual snowfall: snow is usually limited near the lakeshore, while Cascade foothills receive much more, with substantial year-to-year and elevation variation.
• Warmest months: July and August are normally warmest.
• Coolest months: December and January are typically coolest.
• Wettest season: November through January.
• Driest season: July and August.
• Best outdoor window: June through September for boating and paddling, with spring and fall good for cycling.