Updated 14 Sep 2026 · recomputed nightly
Is August 2027 a good month to visit Seattle?
Packed — the typical August day in Seattle is busier than 87% of its year.
If you are coming for something that only happens in August, that is the trade. If not, February is quieter.
Calm · Lively · Busy · Packed rank a day against Seattle's own year — not a headcount.
August is one of Seattle's busiest months: warm and showery, around 25°C / 77°F, and Packed on 16 of 31 days.
It depends. The typical August day in Seattle is Packed, and 27 of the 31 days in our window run Busy or Packed, so most days feel crowded. Expect around 25 °C by day, with rain on about 6 days. Public holidays in Canada and the UK add to it. Cruise ships call on 27 of the 31 days, 4 at once on Sunday 8 August. Mid August is the month's quietest stretch in Seattle — the typical day at 82%, against 88% in early August. For similar weather with fewer people, come in September or October. The crush is at the Overlook Walk stairs; the quiet is at Pioneer Square when nothing is on. The calmest day is Wednesday 4 August, the busiest Friday 6 August.
In short, worth it for the peak buzz, if you can take the crowds.
Among the 12 months we forecast for Seattle, August ranks 2nd for crowd pressure. Its heaviest day is Fri 6 Aug, busier than 98% of the year; its lightest is Wed 4 Aug at 61%.
Preparing pays off in a month like this: timed-entry tickets and pre-booked tours turn the queue time into sightseeing time. see the options →
Nothing extreme to plan around — rain on 6 of 31 days.
The one thing you wear all day, every day of the trip.
See walking shoes →
A folding one lives in the day bag and weighs nothing.
See umbrellas →
How busy is Seattle in August?
The busiest days are the 6th, 13th, 20th and 30th, and 23 more. Away from those, most days sit Lively.
Cruise ships are in port on 27 of 31 days; the heaviest is Sun 8 Aug, 4 ships in at once. Those mornings fill the squares first — start early, or save them for indoors.
The month is not one thing: its lightest day sits at 61% of the year and its heaviest at 98%, so where you land inside it matters. All five Sundays run Packed. Daylight runs about 14 hours.
Either side of it, September is a little calmer.
The calmest days include the 4th, 11th and 18th — 4 days share that level, so there is room to choose.
Sun 01 Aug Packed busier than 93% of days here · ⚓3
- Norwegian Encore — guest capacity 3,998 07:00–15:00
- Star Princess — guest capacity 4,320 07:00–15:00
- ms Noordam — guest capacity 1,972 07:00–15:00
Record Seattle on Sun 1 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 10,290 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Tue 3 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-01 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 02 Aug Packed busier than 87% of days here · ⚓2 · Canada public holiday
- MSC Poesia — guest capacity 2,550 07:00–16:00
- Quantum Of The Seas — guest capacity 4,162 06:00–16:00
Record Seattle on Mon 2 Aug 2027 is forecast Packed. 2 cruise ships scheduled, at least 6,712 guests at double occupancy; ships in port 06:00–16:00. Why: Canada public holiday; UK public holiday. Nearest calmer day: Tue 3 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-02 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 03 Aug Busy busier than 67% of days here · ⚓1
- Carnival Legend — guest capacity 2,124 07:00–15:00
Record Seattle on Tue 3 Aug 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,124 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Wed 4 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-03 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Wed 04 Aug Lively busier than 61% of days here
Record Seattle on Wed 4 Aug 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-08-04 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Thu 05 Aug Busy busier than 77% of days here · ⚓3
- Brilliant Lady — guest capacity 2,770 07:00–17:00
- Carnival Spirit — guest capacity 2,124 07:00–15:00
- Oceania Riviera — guest capacity 1,258 08:00–17:00
Record Seattle on Thu 5 Aug 2027 is forecast Busy. 3 cruise ships scheduled, at least 6,152 guests at double occupancy; ships in port 07:00–17:00. Nearest calmer day: Wed 4 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-05 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Fri 06 Aug Packed busier than 98% of days here · ⚓3
- Celebrity Edge — guest capacity 2,918 06:00–16:00
- Norwegian Joy — guest capacity 3,804 06:00–15:00
- Voyager Of The Seas — guest capacity 3,416 06:00–16:00
Record Seattle on Fri 6 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 10,138 guests at double occupancy; ships in port 06:00–16:00. Nearest calmer day: Thu 5 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-06 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sat 07 Aug Packed busier than 92% of days here · ⚓3
- Norwegian Bliss — guest capacity 4,056 06:00–15:00
- Royal Princess — guest capacity 3,560 07:00–15:00
- ms Eurodam — guest capacity 2,104 07:00–15:00
Record Seattle on Sat 7 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Nearest calmer day: Thu 5 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-07 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 08 Aug Packed busier than 96% of days here · ⚓4
- MS Roald Amundsen — guest capacity 530
- Norwegian Encore — guest capacity 3,998 07:00–15:00
- Star Princess — guest capacity 4,320 07:00–15:00
- ms Noordam — guest capacity 1,972 07:00–15:00
Record Seattle on Sun 8 Aug 2027 is forecast Packed. 4 cruise ships scheduled, at least 10,820 guests at double occupancy. Nearest calmer day: Tue 10 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-08 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 09 Aug Packed busier than 88% of days here · ⚓3
- MS Roald Amundsen — guest capacity 530
- MSC Poesia — guest capacity 2,550 07:00–16:00
- Quantum Of The Seas — guest capacity 4,162 06:00–16:00
Record Seattle on Mon 9 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 7,242 guests at double occupancy. Nearest calmer day: Tue 10 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-09 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 10 Aug Busy busier than 70% of days here · ⚓2
- Carnival Legend — guest capacity 2,124 07:00–15:00
- MS Roald Amundsen — guest capacity 530
Record Seattle on Tue 10 Aug 2027 is forecast Busy. 2 cruise ships scheduled, at least 2,654 guests at double occupancy. Nearest calmer day: Wed 11 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-10 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Wed 11 Aug Lively busier than 61% of days here
Record Seattle on Wed 11 Aug 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-08-11 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Thu 12 Aug Busy busier than 77% of days here · ⚓3
- Brilliant Lady — guest capacity 2,770 07:00–17:00
- Carnival Spirit — guest capacity 2,124 07:00–15:00
- Oceania Riviera — guest capacity 1,258 08:00–17:00
Record Seattle on Thu 12 Aug 2027 is forecast Busy. 3 cruise ships scheduled, at least 6,152 guests at double occupancy; ships in port 07:00–17:00. Nearest calmer day: Wed 11 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-12 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Fri 13 Aug Packed busier than 98% of days here · ⚓3
- Celebrity Edge — guest capacity 2,918 06:00–16:00
- Norwegian Joy — guest capacity 3,804 06:00–15:00
- Voyager Of The Seas — guest capacity 3,416 06:00–16:00
Record Seattle on Fri 13 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 10,138 guests at double occupancy; ships in port 06:00–16:00. Nearest calmer day: Thu 12 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-13 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sat 14 Aug Packed busier than 92% of days here · ⚓3
- Norwegian Bliss — guest capacity 4,056 06:00–15:00
- Royal Princess — guest capacity 3,560 07:00–15:00
- ms Eurodam — guest capacity 2,104 07:00–15:00
Record Seattle on Sat 14 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Nearest calmer day: Thu 12 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-14 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 15 Aug Packed busier than 93% of days here · ⚓3
- Norwegian Encore — guest capacity 3,998 07:00–15:00
- Star Princess — guest capacity 4,320 07:00–15:00
- ms Noordam — guest capacity 1,972 07:00–15:00
Record Seattle on Sun 15 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 10,290 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Tue 17 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-15 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 16 Aug Packed busier than 87% of days here · ⚓2 · Canada public holiday
- MSC Poesia — guest capacity 2,550 07:00–16:00
- Quantum Of The Seas — guest capacity 4,162 06:00–16:00
Record Seattle on Mon 16 Aug 2027 is forecast Packed. 2 cruise ships scheduled, at least 6,712 guests at double occupancy; ships in port 06:00–16:00. Why: Canada public holiday; KR public holiday. Nearest calmer day: Tue 17 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-16 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 17 Aug Busy busier than 67% of days here · ⚓1
- Carnival Legend — guest capacity 2,124 07:00–15:00
Record Seattle on Tue 17 Aug 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,124 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Wed 18 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-17 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Wed 18 Aug Lively busier than 61% of days here
Record Seattle on Wed 18 Aug 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-08-18 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Thu 19 Aug Busy busier than 67% of days here · ⚓1
- Carnival Spirit — guest capacity 2,124 07:00–15:00
Record Seattle on Thu 19 Aug 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,124 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Wed 18 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-19 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Fri 20 Aug Packed busier than 98% of days here · ⚓3
- Celebrity Edge — guest capacity 2,918 06:00–16:00
- Norwegian Joy — guest capacity 3,804 06:00–15:00
- Voyager Of The Seas — guest capacity 3,416 06:00–16:00
Record Seattle on Fri 20 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 10,138 guests at double occupancy; ships in port 06:00–16:00. Nearest calmer day: Thu 19 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-20 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sat 21 Aug Packed busier than 92% of days here · ⚓3
- Norwegian Bliss — guest capacity 4,056 06:00–15:00
- Royal Princess — guest capacity 3,560 07:00–15:00
- ms Eurodam — guest capacity 2,104 07:00–15:00
Record Seattle on Sat 21 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Nearest calmer day: Thu 19 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-21 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 22 Aug Packed busier than 93% of days here · ⚓3
- Norwegian Encore — guest capacity 3,998 07:00–15:00
- Star Princess — guest capacity 4,320 07:00–15:00
- ms Noordam — guest capacity 1,972 07:00–15:00
Record Seattle on Sun 22 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 10,290 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Mon 23 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-22 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 23 Aug Busy busier than 84% of days here · ⚓2
- MSC Poesia — guest capacity 2,550 07:00–16:00
- Quantum Of The Seas — guest capacity 4,162 06:00–16:00
Record Seattle on Mon 23 Aug 2027 is forecast Busy. 2 cruise ships scheduled, at least 6,712 guests at double occupancy; ships in port 06:00–16:00. Nearest calmer day: Wed 25 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-23 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 24 Aug Busy busier than 73% of days here · ⚓2
- Brilliant Lady — guest capacity 2,770 07:00–17:00
- Carnival Legend — guest capacity 2,124 07:00–15:00
Record Seattle on Tue 24 Aug 2027 is forecast Busy. 2 cruise ships scheduled, at least 4,894 guests at double occupancy; ships in port 07:00–17:00. Nearest calmer day: Wed 25 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-24 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Wed 25 Aug Lively busier than 61% of days here
Record Seattle on Wed 25 Aug 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-08-25 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Thu 26 Aug Busy busier than 67% of days here · ⚓1
- Carnival Spirit — guest capacity 2,124 07:00–15:00
Record Seattle on Thu 26 Aug 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,124 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Wed 25 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-26 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Fri 27 Aug Busy busier than 82% of days here · ⚓2
- Celebrity Edge — guest capacity 2,918 06:00–16:00
- Voyager Of The Seas — guest capacity 3,416 06:00–16:00
Record Seattle on Fri 27 Aug 2027 is forecast Busy. 2 cruise ships scheduled, at least 6,334 guests at double occupancy; ships in port 06:00–16:00. Nearest calmer day: Wed 25 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-27 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sat 28 Aug Packed busier than 92% of days here · ⚓3
- Norwegian Bliss — guest capacity 4,056 06:00–15:00
- Royal Princess — guest capacity 3,560 07:00–15:00
- ms Eurodam — guest capacity 2,104 07:00–15:00
Record Seattle on Sat 28 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Nearest calmer day: Fri 27 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-28 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 29 Aug Packed busier than 87% of days here · ⚓2
- Norwegian Encore — guest capacity 3,998 07:00–15:00
- Star Princess — guest capacity 4,320 07:00–15:00
Record Seattle on Sun 29 Aug 2027 is forecast Packed. 2 cruise ships scheduled, at least 8,318 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Fri 27 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-29 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 30 Aug Packed busier than 98% of days here · ⚓3 · UK public holiday
- MSC Poesia — guest capacity 2,550 07:00–16:00
- Norwegian Joy — guest capacity 3,804 06:00–15:00
- Quantum Of The Seas — guest capacity 4,162 06:00–16:00
Record Seattle on Mon 30 Aug 2027 is forecast Packed. 3 cruise ships scheduled, at least 10,516 guests at double occupancy; ships in port 06:00–16:00. Why: UK public holiday. Nearest calmer day: Tue 31 Aug (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-30 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 31 Aug Busy busier than 67% of days here · ⚓1
- Carnival Legend — guest capacity 2,124 07:00–15:00
Record Seattle on Tue 31 Aug 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,124 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Wed 1 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/seattle/#d-2027-08-31 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Which week of August is quietest in Seattle?
Mid August is the month's quietest stretch in Seattle — the typical day at 82%, against 88% in early August.
Can't move the dates? How to avoid the worst crowds
- The heaviest port day is Sun 8 Aug — 4 ships in at once. See the marquee sights on a lighter day, or be there for opening time.
- On the busy days, the walk-up queues for the big sights are the biggest time-sink — a timed-entry ticket skips them, which is where a busy month is won or lost.
Travelling on a busy day?
Timed-entry and skip-the-line tickets turn queue time into sightseeing time — sort them before you fly.
August weather in Seattle
Comfortably warm — around 25°C / 77°F, easy shirtsleeve weather, with rain on about 6 days. The days are long too — close to 14 hours of light — so the evenings stay open for walking once the heat drops.
Book beds and the big-ticket sights well ahead, and start your days by eight — in a month this full, the early hours are the only uncrowded ones.
More about Seattle in August
Based on: United States' public holidays · the official airport-arrivals pattern (BTS T-100, measured 2023–2025; airport-arrivals proxy for visitor volume) · five years of weather records (2019–2023) · confirmed event dates · the published cruise schedule
Every figure is recomputed nightly from real cruise schedules, public and school holidays, and long-run climate normals. Gaps are shown, not filled.
