Late summer · Weather & things to do
Seattle in August
Seattle's warmest month brings highs averaging 75°F (24°C), lows of 56°F (14°C) and about 1.1 in (29 mm) of rain.
At 90/100 for comfort (the top score of the year), it's one of the best months to visit.
- Avg high
- 75°F (24°C)
- Avg low
- 56°F (14°C)
- Rain
- 1.1 in (29 mm)
- Humidity
- 76%
- Cloud cover
- 48%
- Daylight
- ~14 h 05 min
- Comfort score
- 90/100 · Great
What August feels like
Highs settle around 75°F (24°C), warm enough for short sleeves most of the day.
Lows average 56°F (14°C).
It's one of the drier stretches, with only about 1.1 in (29 mm) of rain.
Plan around August
August is one of Seattle's best months on the climate data.
- Last warm month for a while: September highs fall to 69°F.
- Comfort holds steady from July (89 → 90/100).
- August sits inside the Jun – Sep window our Pacific Northwest route recommends.
- August sits inside the May – Sep window our Puget Sound Islands route recommends.
- Our Seattle, Snoqualmie Pass & Leavenworth route is planned for Late Nov – Dec, a window set by the holiday season rather than the weather — August falls outside it.
What to pack for August
- Light, breathable clothes75°F afternoons
- Sunscreen, sunglasses and a hathigh UV on clear days
- Comfortable walking shoesmost picks involve some walking
What to do in Seattle in August
August is good outdoor weather here, so these picks lean toward the open air.
Hiram M. Chittenden Locks
Ballard Locks move boats between Lake Washington and Puget Sound; fish ladder windows show migrating salmon.
Why now Our curated notes say it's best Jul–Sep.
Elliott's Oyster House
Waterfront seafood institution on Pier 56 with a long raw-oyster list.
Why now August scores 90/100 for comfort, good conditions for being outside.
Westlake Park
Downtown plaza that hosts the city's tree lighting, a holiday carousel and light-wrapped trees each December.
Why now Highs near 75°F and 1.1 in of monthly rain make this an easy outdoor pick.
The Pink Door
Italian-American restaurant behind an unmarked pink door in Post Alley, open since 1981, with cabaret and trapeze nights.
Why now One to do outside while the weather is on your side.
Discovery Park
Seattle's largest park: bluff meadows, forest loop trail and a beach walk to West Point Lighthouse.
Zig Zag Café
Classic cocktail bar tucked down the Pike Street Hillclimb steps below the market.
Nearby in August
- Bainbridge Island in August~9 mi · highs 75°F, 1.1 in rain · similar daytime temperatures, about as wet
- Snoqualmie Pass in August~45 mi · highs 69°F, 1.5 in rain · 3°C (6°F) cooler by day, about as wet
- Olympic NP in August~61 mi · highs 59°F, 1.7 in rain · 9°C (15°F) cooler by day, about as wet
- San Juan Island in August~71 mi · highs 70°F, 1.1 in rain · 3°C (5°F) cooler by day, about as wet
These averages also cover Pike Place Market & Waterfront and Seattle Center & Queen Anne.
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Seattle in August: quick answers
Is August a good time to visit Seattle?
Yes. On the climate data it's one of the best months, scoring 90/100. Expect highs of 75°F (24°C) and 1.1 in (29 mm) of rain. August is inside the Jun – Sep window our Pacific Northwest route recommends.
How hot is Seattle in August?
Average highs are 75°F (24°C) and average lows 56°F (14°C), making it the warmest month by daytime highs.
Does it rain a lot in Seattle in August?
Not much: about 1.1 in (29 mm) of rain falls across August on average, the 2nd-driest month of the year. The annual total is about 48.4 in (1230 mm).
What should I pack for Seattle in August?
Bring light, breathable clothes (75°F afternoons), sunscreen, sunglasses and a hat (high UV on clear days) and comfortable walking shoes (most picks involve some walking).
Routes in season in August
- Pacific Northwest Jun – Sep
- Puget Sound Islands May – Sep
Planning Seattle in August?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.