Updated 14 Sep 2026 · recomputed nightly
Is May 2027 a good month to visit Seattle?
Busy — the typical May day in Seattle is busier than 75% of its year.
If you are coming for something that only happens in May, that is the trade. If not, February is quieter.
Calm · Lively · Busy · Packed rank a day against Seattle's own year — not a headcount.
This month's verified events: Memorial Day (31).
May 2027 is peak-season Seattle: mild and wet, around 18°C / 64°F with rain on about 11 days, and Busy on 15 of 31 days.
No. The typical May day in Seattle is Busy, and 24 of the 31 days in our window run Busy or Packed, so most days feel crowded. Expect around 18 °C by day, with rain on about 11 days. Public holidays in the UK add to it. Cruise ships call on 28 of the 31 days, 3 at once on Sunday 9 May. Memorial Day falls on 31 May. Mid May is the month's quietest stretch in Seattle — the typical day at 68%, against 84% in late May. For similar weather with fewer people, come in October. The crush is at the Overlook Walk stairs; the quiet is at Pioneer Square when nothing is on. The calmest day is Wednesday 12 May, the busiest Monday 31 May.
In short, a hard sell — heavy crowds without the best of the weather.
Among the 12 months we forecast for Seattle, May ranks 4th for crowd pressure. Its heaviest day is Mon 31 May, busier than 99% of the year; its lightest is Wed 12 May at 55%.
⚠︎ Weekends run heavy — the 1st, 2nd, 8th, 9th, 15th, 16th, 22nd, 23rd, 29th and 30th all sit Busy or Packed. If your dates can flex, a midweek arrival is the single easiest win.
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 →
Pack for wet first — rain on 11 of 31 days.
A folding one lives in the day bag and weighs nothing.
See umbrellas →
Wet stone is the thing to plan around in a month this wet.
See walking shoes →
How busy is Seattle in May?
The busiest days are the 4th, 8th, 28th and 31st, and 20 more. Away from those, most days sit Lively. The calmest stretch is the 11th–13th.
Cruise ships are in port on 28 of 31 days; the heaviest is Sun 9 May, 3 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 55% of the year and its heaviest at 99%, so where you land inside it matters. All five Saturdays run Busy or Packed. Daylight runs about 15 hours.
Either side of it, April is far calmer and June is busier still.
Weekends run heavy — the 1st, 2nd, 8th, 9th, 15th, 16th, 22nd, 23rd, 29th and 30th all sit Busy or Packed. If your dates can flex, a midweek arrival is the single easiest win.
Sat 01 May Packed busier than 86% of days here · ⚓3 · China public holiday
- 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 1 May 2027 is forecast Packed. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Why: China public holiday. Nearest calmer day: Fri 30 Apr (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-2027-05-01 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 02 May Busy busier than 72% of days here · ⚓3
- National Geographic Quest — guest capacity 50
- Norwegian Encore — guest capacity 3,998 07:00–15:00
- ms Noordam — guest capacity 1,972 07:00–15:00
Record Seattle on Sun 2 May 2027 is forecast Busy. 3 cruise ships scheduled, at least 6,020 guests at double occupancy. Nearest calmer day: Fri 30 Apr (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-2027-05-02 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 03 May Busy busier than 74% of days here · ⚓2 · UK public holiday
- MSC Poesia — guest capacity 2,550 07:00–16:00
- Quantum Of The Seas — guest capacity 4,162 16:00–?
Record Seattle on Mon 3 May 2027 is forecast Busy. 2 cruise ships scheduled, at least 6,712 guests at double occupancy. Why: UK public holiday; KR public holiday. Nearest calmer day: Wed 5 May (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-2027-05-03 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 04 May Packed busier than 93% of days here · ⚓2
- Carnival Legend — guest capacity 2,124 07:00–15:00
- Quantum Of The Seas — guest capacity 4,162 06:00–02:00
Record Seattle on Tue 4 May 2027 is forecast Packed. 2 cruise ships scheduled, at least 6,286 guests at double occupancy; ships in port 06:00–15:00. Nearest calmer day: Mon 3 May (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-2027-05-04 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Wed 05 May Lively busier than 56% of days here · KR public holiday
Record Seattle on Wed 5 May 2027 is forecast Lively. Why: KR public holiday. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-05-05 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Thu 06 May Lively busier than 62% of days here · ⚓2
- Carnival Spirit — guest capacity 2,124 07:00–15:00
- Safari Quest — guest capacity 16
Record Seattle on Thu 6 May 2027 is forecast Lively. 2 cruise ships scheduled, at least 2,140 guests at double occupancy. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-05-06 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Fri 07 May Busy busier than 77% of days here · ⚓3
- Celebrity Summit — guest capacity 2,158 11:00–20:00
- Serenade Of The Seas — guest capacity 2,148 08:00–17:00
- Voyager Of The Seas — guest capacity 3,416 16:00–?
Record Seattle on Fri 7 May 2027 is forecast Busy. 3 cruise ships scheduled, at least 7,722 guests at double occupancy. Nearest calmer day: Thu 6 May (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-2027-05-07 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sat 08 May Packed busier than 87% of days here · ⚓3 · United States public holiday
- 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 8 May 2027 is forecast Packed. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Why: United States public holiday. Nearest calmer day: Fri 7 May (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-2027-05-08 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 09 May Packed busier than 85% 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 9 May 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 10 May (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-2027-05-09 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 10 May Busy busier than 75% 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 10 May 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: Tue 11 May (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-2027-05-10 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 11 May Lively busier than 61% of days here · ⚓1
- Carnival Legend — guest capacity 2,124 07:00–15:00
Record Seattle on Tue 11 May 2027 is forecast Lively. 1 cruise ship scheduled, at least 2,124 guests at double occupancy; ships in port 07:00–15:00. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-05-11 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Wed 12 May Lively busier than 55% of days here
Record Seattle on Wed 12 May 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-05-12 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Thu 13 May Lively busier than 62% of days here · ⚓1 · KR public holiday
- Carnival Spirit — guest capacity 2,124 07:00–15:00
Record Seattle on Thu 13 May 2027 is forecast Lively. 1 cruise ship scheduled, at least 2,124 guests at double occupancy; ships in port 07:00–15:00. Why: KR public holiday. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-05-13 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Fri 14 May Busy busier than 68% of days here · ⚓1
- Voyager Of The Seas — guest capacity 3,416 06:00–16:00
Record Seattle on Fri 14 May 2027 is forecast Busy. 1 cruise ship scheduled, at least 3,416 guests at double occupancy; ships in port 06:00–16:00. Nearest calmer day: Thu 13 May (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-2027-05-14 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sat 15 May Busy busier than 84% 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 15 May 2027 is forecast Busy. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Nearest calmer day: Thu 13 May (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-2027-05-15 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 16 May Packed busier than 85% 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 16 May 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: Sat 15 May (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-2027-05-16 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 17 May Busy busier than 75% 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 17 May 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: Thu 13 May (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-2027-05-17 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 18 May Busy busier than 66% of days here · ⚓2
- Azamara Quest — guest capacity 722 08:00–22:00
- Carnival Legend — guest capacity 2,124 07:00–15:00
Record Seattle on Tue 18 May 2027 is forecast Busy. 2 cruise ships scheduled, at least 2,846 guests at double occupancy; ships in port 07:00–22:00. Nearest calmer day: Thu 13 May (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-2027-05-18 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Wed 19 May Busy busier than 68% of days here · ⚓1
- Norwegian Joy — guest capacity 3,804 15:00–?
Record Seattle on Wed 19 May 2027 is forecast Busy. 1 cruise ship scheduled, at least 3,804 guests at double occupancy. Nearest calmer day: Thu 13 May (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-2027-05-19 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Thu 20 May Busy busier than 71% of days here · ⚓2
- Brilliant Lady — guest capacity 2,770 07:00–17:00
- Carnival Spirit — guest capacity 2,124 07:00–15:00
Record Seattle on Thu 20 May 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: Tue 25 May (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-2027-05-20 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Fri 21 May Busy busier than 74% 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 21 May 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: Tue 25 May (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-2027-05-21 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sat 22 May Busy busier than 84% 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 22 May 2027 is forecast Busy. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Nearest calmer day: Tue 25 May (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-2027-05-22 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 23 May Packed busier than 85% 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 23 May 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: Sat 22 May (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-2027-05-23 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 24 May Busy busier than 81% of days here · ⚓3 · Canada public holiday
- MSC Poesia — guest capacity 2,550 07:00–16:00
- Oceania Riviera — guest capacity 1,258 08:00–17:00
- Quantum Of The Seas — guest capacity 4,162 06:00–16:00
Record Seattle on Mon 24 May 2027 is forecast Busy. 3 cruise ships scheduled, at least 7,970 guests at double occupancy; ships in port 06:00–17:00. Why: Canada public holiday. Nearest calmer day: Tue 25 May (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-2027-05-24 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Tue 25 May Lively busier than 61% of days here · ⚓1
- Carnival Legend — guest capacity 2,124 07:00–15:00
Record Seattle on Tue 25 May 2027 is forecast Lively. 1 cruise ship scheduled, at least 2,124 guests at double occupancy; ships in port 07:00–15:00. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-05-25 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Wed 26 May Lively busier than 55% of days here
Record Seattle on Wed 26 May 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/seattle/#d-2027-05-26 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Thu 27 May Busy busier than 72% of days here · ⚓3
- Brilliant Lady — guest capacity 2,770 07:00–17:00
- Carnival Spirit — guest capacity 2,124 07:00–15:00
- Silver Whisper — guest capacity 388 17:00–?
Record Seattle on Thu 27 May 2027 is forecast Busy. 3 cruise ships scheduled, at least 5,282 guests at double occupancy. Nearest calmer day: Wed 26 May (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-2027-05-27 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Fri 28 May Packed busier than 91% 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 28 May 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 27 May (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-2027-05-28 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sat 29 May Busy busier than 84% 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 29 May 2027 is forecast Busy. 3 cruise ships scheduled, at least 9,720 guests at double occupancy; ships in port 06:00–15:00. Nearest calmer day: Wed 26 May (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-2027-05-29 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Sun 30 May Packed busier than 85% 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 30 May 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: Sat 29 May (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-2027-05-30 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Mon 31 May Packed busier than 99% of days here · ⚓2 · United States public holiday · Memorial Day
Event on this day
31 May 2027The long weekend that opens the warm season. It carries the Northwest Folklife Festival at Seattle Center and it is usually the first weekend of the year when the whole region goes out.
- 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 31 May 2027 is forecast Packed. 2 cruise ships scheduled, at least 6,712 guests at double occupancy; ships in port 06:00–16:00. Why: United States public holiday; UK public holiday; Memorial Day. Nearest calmer day: Tue 1 Jun (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-2027-05-31 (Avoid-Crowds, as of 14 Sep 2026; recomputed nightly.)
Which week of May is quietest in Seattle?
Mid May is the month's quietest stretch in Seattle — the typical day at 68%, against 84% in late May.
Can't move the dates? How to avoid the worst crowds
- The heaviest port day is Sun 9 May — 3 ships in at once. See the marquee sights on a lighter day, or be there for opening time.
- Need flexibility? The 11th–13th is the month's calmest stretch — the easiest window to move around in.
- 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.
May weather in Seattle
Mild — around 18°C / 64°F, with a light jacket for the evenings, with rain on about 11 days, so keep a layer handy. The days are long too — close to 15 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 May
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.
