Seattle, Washington Weather in August

August weather

August is Seattle's warmest month, with highs around 24°C and little rain. Days are often sunny, and evenings cool down nicely. You can spend the day walking Pike Place Market, taking a ferry, or relaxing at Alki Beach.

The dry spell suits hikes on Discovery Park's trails, too. Skip long, exposed walks in the middle of a sunny afternoon if you're sensitive to heat. The air can feel a little sticky, but it's rarely a reason to stay indoors.

Events and crowds

Seafair brings summer events across the city, including hydroplane races on Lake Washington and Blue Angels flight performances. Expect crowds and traffic near the lake during Seafair's main weekend.

Families who enjoy planes and loud, lively events may love Seafair, but it's not a quiet weekend.

August is peak season, so hotels and flights usually cost more than in the quieter winter months. Popular spots like Pike Place Market and the waterfront can feel busy, especially on sunny weekends. September is cooler and wetter, while July is also dry and warm, so August isn't the only good month for a Seattle visit.

A local tip

For a calmer break from downtown crowds, take the ferry from the Seattle waterfront to Bainbridge Island. The ride gives you open-water views and a different feel from the city streets. Walk-on passengers can explore Winslow on foot, with cafés and shops close to the terminal.

On Seafair weekend, avoid driving around Lake Washington if you can. Traffic near the races and flight displays can slow down your day.