Seattle weather in August
“The kind of pleasant weather you build a trip around.”
Roughly 4 rainy days across the month, on average.
August is Seattle's warmest and driest month, with average highs of 25.6°C (78°F) and lows of 15.1°C (59°F). You'll enjoy around 11.5 hours of daily sunshine with minimal rainfall—just 28.2mm spread across 4.5 rainy days. It's the ideal time to experience the city's outdoor culture without heavy downpours.
This is peak summer in Seattle, bringing vibrant street festivals, farmers markets in full swing, and lively waterfront scenes. Pike Place Market buzzes with energy, and neighborhoods like Capitol Hill and Ballard host numerous outdoor events. Crowds are moderate to high, but the weather more than compensates for busier attractions.
For 2026, pack layers despite the warmth—mornings and evenings cool down noticeably. August is one of the best months to visit Seattle, offering reliable sunshine for hiking in the Cascades, kayaking, and exploring the San Juan Islands. Book accommodations early, as summer demand is strong.
What to pack for Seattle in August
August weather in Seattle calls for breathable layers. Mornings start cool, afternoons warm up pleasantly, and evenings require a light jacket. Bring versatile pieces that work across temperature swings and occasional showers.
- Lightweight cotton t-shirt or linen shirt
- Light rain jacket or windbreaker
- Comfortable walking shorts or chinos
- Closed-toe hiking shoes or sneakers
- Thin sweater or fleece for evenings
What to pack for Seattle in August
- →Breathable travel pantsAmazon · shop this
- →Reef-safe sunscreen SPF 50Amazon · shop this
- →Polarized sunglassesAmazon · shop this
- →Universal travel adapterAmazon · shop this
- →Compression packing cubesAmazon · shop this
- →Anti-theft crossbody bagAmazon · shop this
We may earn a small commission on any purchase — it doesn't change the price you pay.
Where to stay in Seattle
We don't review individual hotels — plenty of people do that well. What we do is send you to compare rooms in Seattle across trusted platforms.
Compare hotels on Booking.com→Things worth doing
Hike Mount Rainier or the Cascades, kayak Lake Union or Puget Sound, explore Pike Place Market and waterfront, visit Olympic Sculpture Park and museums.
August vs. the rest of the year
How this month compares in Seattle. Tap any month to read more.
highlighted months are among the best time to visit.
Best time to visit Seattle
August is one of the best months to visit Seattle — alongside May, June, July. Ten-year climate data confirms it: comfortable temperatures, manageable rainfall, and a healthy dose of sunshine.
See the full best-time-to-visit guide for SeattleOther places with a similar climate right now
Seattle in August — FAQ
Q01Is August a good time to visit Seattle?
Is August a good time to visit Seattle?
Yes — this is one of the best months of the year to visit. In August, Seattle averages a high of 26°C (78°F) and a low of 15°C (59°F), with 26mm of rainfall across roughly 4 rainy days.
Q02What is the average temperature in Seattle in August?
What is the average temperature in Seattle in August?
The average high temperature in Seattle during August is 26°C (78°F), with an average low of 15°C (59°F). These figures are averaged from ten years of daily records (2015–2024, Open-Meteo Archive).
Q03How many rainy days does Seattle have in August?
How many rainy days does Seattle have in August?
Seattle averages approximately 4 rainy days in August, with a total monthly rainfall of about 26mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days.
Q04What should I pack for Seattle in August?
What should I pack for Seattle in August?
For Seattle in August, pack layered clothing for changing temperatures, sunscreen and sunglasses, comfortable walking shoes. These recommendations are based on the ten-year weather averages for this specific month.
Q05How crowded is Seattle in August?
How crowded is Seattle in August?
Tourist crowds in Seattle during August are typically high — this is peak season, expect crowds and higher prices. Consider this when planning accommodation — prices track crowd levels closely.