Updated 3 Nov 2026 · recomputed nightly
Is September 2027 a good month to visit Cozumel?
Calm — September is Cozumel's quietest month: the typical day is calmer than 92% of its year.
The weather is the trade-off here, not the crowds.
Calm · Lively · Busy · Packed rank a day against Cozumel's own year — not a headcount.
September is Cozumel with the crowds gone — Calm every day, hot and wet, around 31°C / 88°F with rain on about 19 days.
Yes, if the weather does not put you off. September in Cozumel is Calm on the typical day, and not one of the 30 days in our window is crowded enough to call Busy. Expect around 31 °C by day, with rain on about 19 days. Public holidays in Canada and United States add to it. Cruise ships call on 28 of the 30 days, 4 at once on Wednesday 22 September. Mid September is the month's quietest stretch in Cozumel — the typical day at 4%, against 10% in late September. The crush is at the pier blocks on three-ship days; the quiet is at the east side entire. The calmest day is Sunday 5 September, the busiest Wednesday 22 September.
In short, quiet and wide open, if the weather doesn't put you off.
Among the 12 months we forecast for Cozumel, September ranks 11th for crowd pressure. Its heaviest day is Wed 22 Sep, busier than 34% of the year; its lightest is Sun 5 Sep at 0%.
You won't need skip-the-line tickets here — that's rather the point. A month like this is the one for the longer visit — the guided walk, the food tour, the day out of town, with room and time to enjoy them. see what's on →
Pack for wet first — rain on 19 of 30 days.
A folding one lives in the day bag and weighs nothing.
See umbrellas →
Refilling costs nothing and saves the walk to find a shop.
See water bottles →
How busy is Cozumel in September?
It's quiet right through September — no crowded stretch to plan around.
Cruise ships are in port on 28 of 30 days; the heaviest is Wed 22 Sep, 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 0% of the year and its heaviest at 34%, so where you land inside it matters. Daylight runs about 12 hours.
Either side of it, August picks up.
Any day works. There is no need to plan your dates around the crowds.
Wed 01 Sep Calm busier than 6% of days here · ⚓2
- Carnival Dream — guest capacity 3,646 08:00–16:00
- MSC World America — guest capacity 5,240 09:00–19:00
Record Cozumel on Wed 1 Sep 2027 is forecast Calm. 2 cruise ships scheduled, at least 8,886 guests at double occupancy; ships in port 08:00–19:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-01 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Thu 02 Sep Calm busier than 24% of days here · ⚓5
- Carnival Breeze — guest capacity 3,690 09:00–17:00
- Celebrity Reflection — guest capacity 3,046 10:00–20:00
- Enchantment Of The Seas — guest capacity 2,284 07:00–17:00
- Liberty Of The Seas — guest capacity 3,678
- Margaritaville At Sea Islander — guest capacity 2,210
Record Cozumel on Thu 2 Sep 2027 is forecast Calm. 5 cruise ships scheduled, at least 14,908 guests at double occupancy. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-02 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Fri 03 Sep Calm busier than 20% of days here · ⚓3
- MSC Seascape — guest capacity 4,540 08:00–16:00
- Norwegian Aqua — guest capacity 3,571 10:00–18:00
- Star Of The Seas — guest capacity 5,610 07:00–17:00
Record Cozumel on Fri 3 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 13,721 guests at double occupancy; ships in port 07:00–18:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-03 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Sat 04 Sep Calm busier than 3% of days here · ⚓2
- Carnival Horizon — guest capacity 3,960 09:00–17:00
- Radiance Of The Seas — guest capacity 2,122 07:00–17:00
Record Cozumel on Sat 4 Sep 2027 is forecast Calm. 2 cruise ships scheduled, at least 6,082 guests at double occupancy; ships in port 07:00–17:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-04 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Sun 05 Sep Calm busier than 0% of days here
Record Cozumel on Sun 5 Sep 2027 is forecast Calm. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-05 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Mon 06 Sep Calm busier than 8% of days here · ⚓3 · United States public holiday
- Carnival Dream — guest capacity 3,646 08:00–16:00
- Disney Treasure — guest capacity 2,476 08:00–16:00
- Enchantment Of The Seas — guest capacity 2,284
Record Cozumel on Mon 6 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 8,406 guests at double occupancy. Why: United States public holiday; Canada public holiday. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-06 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Tue 07 Sep Calm busier than 5% of days here · ⚓4
- Carnival Paradise — guest capacity 2,124 08:00–16:00
- Hero Of The Seas — size unknown (uncounted)
- Liberty Of The Seas — guest capacity 3,678
- Margaritaville At Sea Islander — guest capacity 2,210 08:00–16:00
Record Cozumel on Tue 7 Sep 2027 is forecast Calm. 4 cruise ships scheduled, at least 8,012 guests at double occupancy, plus 1 of unknown size. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-07 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Wed 08 Sep Calm busier than 21% of days here · ⚓3
- Carnival Celebration — guest capacity 5,374 08:00–16:00
- Carnival Horizon — guest capacity 3,960 09:00–17:00
- MSC Grandiosa — guest capacity 4,888 07:00–19:00
Record Cozumel on Wed 8 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 14,222 guests at double occupancy; ships in port 07:00–19:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-08 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Thu 09 Sep Calm busier than 12% of days here · ⚓3
- Carnival Breeze — guest capacity 3,690 08:00–16:00
- Icon Of The Seas — guest capacity 5,610 07:00–17:00
- Radiance Of The Seas — guest capacity 2,122 07:00–17:00
Record Cozumel on Thu 9 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 11,422 guests at double occupancy; ships in port 07:00–17:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-09 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Fri 10 Sep Calm busier than 5% of days here · ⚓2
- Carnival Liberty — guest capacity 2,978 08:00–16:00
- MSC Seascape — guest capacity 4,540 08:00–16:00
Record Cozumel on Fri 10 Sep 2027 is forecast Calm. 2 cruise ships scheduled, at least 7,518 guests at double occupancy; ships in port 08:00–16:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-10 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Sat 11 Sep Calm busier than 13% of days here · ⚓4
- Carnival Dream — guest capacity 3,646 08:00–16:00
- Carnival Paradise — guest capacity 2,124 08:00–16:00
- Liberty Of The Seas — guest capacity 3,678
- Margaritaville At Sea Islander — guest capacity 2,210 08:00–16:00
Record Cozumel on Sat 11 Sep 2027 is forecast Calm. 4 cruise ships scheduled, at least 11,658 guests at double occupancy. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-11 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Sun 12 Sep Calm busier than 2% of days here · ⚓1
- Norwegian Escape — guest capacity 4,266 08:00–16:00
Record Cozumel on Sun 12 Sep 2027 is forecast Calm. 1 cruise ship scheduled, at least 4,266 guests at double occupancy; ships in port 08:00–16:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-12 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Mon 13 Sep Calm busier than 9% of days here · ⚓2
- Carnival Horizon — guest capacity 3,960 09:00–17:00
- Icon Of The Seas — guest capacity 5,610 08:00–18:00
Record Cozumel on Mon 13 Sep 2027 is forecast Calm. 2 cruise ships scheduled, at least 9,570 guests at double occupancy; ships in port 08:00–18:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-13 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Tue 14 Sep Calm busier than 1% of days here · ⚓1
- Radiance Of The Seas — guest capacity 2,122 07:00–17:00
Record Cozumel on Tue 14 Sep 2027 is forecast Calm. 1 cruise ship scheduled, at least 2,122 guests at double occupancy; ships in port 07:00–17:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-14 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Wed 15 Sep Calm busier than 22% of days here · ⚓3
- Carnival Dream — guest capacity 3,646 08:00–16:00
- Harmony Of The Seas — guest capacity 5,707
- MSC World America — guest capacity 5,240 09:00–19:00
Record Cozumel on Wed 15 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 14,593 guests at double occupancy. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-15 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Thu 16 Sep Calm busier than 4% of days here · ⚓2 · Mexico public holiday
- Enchantment Of The Seas — guest capacity 2,284 07:00–17:00
- Liberty Of The Seas — guest capacity 3,678
Record Cozumel on Thu 16 Sep 2027 is forecast Calm. 2 cruise ships scheduled, at least 5,962 guests at double occupancy. Why: Mexico public holiday. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-16 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Fri 17 Sep Calm busier than 18% of days here · ⚓4
- Carnival Liberty — guest capacity 2,978 10:00–18:00
- Carnival Paradise — guest capacity 2,124 09:00–17:00
- MSC Seascape — guest capacity 4,540 08:00–16:00
- Norwegian Aqua — guest capacity 3,571 10:00–18:00
Record Cozumel on Fri 17 Sep 2027 is forecast Calm. 4 cruise ships scheduled, at least 13,213 guests at double occupancy; ships in port 08:00–18:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-17 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Sat 18 Sep Calm busier than 3% of days here · ⚓2
- Carnival Horizon — guest capacity 3,960 09:00–17:00
- Radiance Of The Seas — guest capacity 2,122 07:00–17:00
Record Cozumel on Sat 18 Sep 2027 is forecast Calm. 2 cruise ships scheduled, at least 6,082 guests at double occupancy; ships in port 07:00–17:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-18 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Sun 19 Sep Calm busier than 0% of days here
Record Cozumel on Sun 19 Sep 2027 is forecast Calm. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-19 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Mon 20 Sep Calm busier than 3% of days here · ⚓2
- Carnival Dream — guest capacity 3,646 08:00–16:00
- Disney Treasure — guest capacity 2,476 08:00–16:00
Record Cozumel on Mon 20 Sep 2027 is forecast Calm. 2 cruise ships scheduled, at least 6,122 guests at double occupancy; ships in port 08:00–16:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-20 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Tue 21 Sep Calm busier than 5% of days here · ⚓3
- Carnival Paradise — guest capacity 2,124 08:00–16:00
- Enchantment Of The Seas — guest capacity 2,284 07:00–17:00
- Liberty Of The Seas — guest capacity 3,678
Record Cozumel on Tue 21 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 8,086 guests at double occupancy. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-21 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Wed 22 Sep Calm busier than 34% of days here · ⚓4
- Carnival Horizon — guest capacity 3,960 09:00–17:00
- Carnival Vista — guest capacity 3,934 09:00–17:00
- MSC Grandiosa — guest capacity 4,888 07:00–19:00
- Symphony Of The Seas — guest capacity 5,518
Record Cozumel on Wed 22 Sep 2027 is forecast Calm. 4 cruise ships scheduled, at least 18,300 guests at double occupancy. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-22 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Thu 23 Sep Calm busier than 12% of days here · ⚓3
- Carnival Breeze — guest capacity 3,690 08:00–16:00
- Icon Of The Seas — guest capacity 5,610 07:00–17:00
- Radiance Of The Seas — guest capacity 2,122 07:00–17:00
Record Cozumel on Thu 23 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 11,422 guests at double occupancy; ships in port 07:00–17:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-23 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Fri 24 Sep Calm busier than 18% of days here · ⚓3
- Carnival Liberty — guest capacity 2,978 08:00–16:00
- MSC Seascape — guest capacity 4,540 08:00–16:00
- Star Of The Seas — guest capacity 5,610 07:00–17:00
Record Cozumel on Fri 24 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 13,128 guests at double occupancy; ships in port 07:00–17:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-24 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Sat 25 Sep Calm busier than 13% of days here · ⚓4
- Carnival Dream — guest capacity 3,646 08:00–16:00
- Carnival Paradise — guest capacity 2,124 08:00–16:00
- Liberty Of The Seas — guest capacity 3,678
- Margaritaville At Sea Islander — guest capacity 2,210 08:00–16:00
Record Cozumel on Sat 25 Sep 2027 is forecast Calm. 4 cruise ships scheduled, at least 11,658 guests at double occupancy. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-25 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Sun 26 Sep Calm busier than 2% of days here · ⚓1
- Norwegian Escape — guest capacity 4,266 08:00–16:00
Record Cozumel on Sun 26 Sep 2027 is forecast Calm. 1 cruise ship scheduled, at least 4,266 guests at double occupancy; ships in port 08:00–16:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-26 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Mon 27 Sep Calm busier than 9% of days here · ⚓2
- Carnival Horizon — guest capacity 3,960 09:00–17:00
- Icon Of The Seas — guest capacity 5,610 08:00–18:00
Record Cozumel on Mon 27 Sep 2027 is forecast Calm. 2 cruise ships scheduled, at least 9,570 guests at double occupancy; ships in port 08:00–18:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-27 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Tue 28 Sep Calm busier than 1% of days here · ⚓1
- Radiance Of The Seas — guest capacity 2,122 07:00–17:00
Record Cozumel on Tue 28 Sep 2027 is forecast Calm. 1 cruise ship scheduled, at least 2,122 guests at double occupancy; ships in port 07:00–17:00. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-28 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Wed 29 Sep Calm busier than 23% of days here · ⚓5
- Carnival Dream — guest capacity 3,646 08:00–16:00
- Hero Of The Seas — size unknown (uncounted)
- Liberty Of The Seas — guest capacity 3,678
- MSC World America — guest capacity 5,240 09:00–19:00
- Margaritaville At Sea Islander — guest capacity 2,210 08:00–16:00
Record Cozumel on Wed 29 Sep 2027 is forecast Calm. 5 cruise ships scheduled, at least 14,774 guests at double occupancy, plus 1 of unknown size. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-29 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Thu 30 Sep Calm busier than 9% of days here · ⚓3 · Canada public holiday
- Carnival Breeze — guest capacity 3,690 09:00–17:00
- Celebrity Reflection — guest capacity 3,046 10:00–20:00
- Enchantment Of The Seas — guest capacity 2,284 08:00–18:00
Record Cozumel on Thu 30 Sep 2027 is forecast Calm. 3 cruise ships scheduled, at least 9,020 guests at double occupancy; ships in port 08:00–20:00. Why: Canada public holiday. This quiet day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/cozumel/#d-2027-09-30 (Avoid-Crowds, as of 3 Nov 2026; recomputed nightly.)
Which week of September is quietest in Cozumel?
Mid September is the month's quietest stretch in Cozumel — the typical day at 4%, against 10% in late September.
The upside of a quiet September
- The big-ticket sights are walk-ins now; the summer booking scramble is gone.
- This is a wing-it month: nothing needs locking in.
- Photograph the landmarks empty — the shot everyone else queues for.
No queues to skip, and nothing to book ahead — that's the whole point.
September weather in Cozumel
Real heat — around 31°C / 88°F by day, so pace the afternoons and carry water, with rain on about 19 days, so keep a layer handy.
This is the value month: no need to book far ahead, and the freedom to change plans on the day is part of what you're getting.
More about Cozumel in September
Based on: Mexico's public holidays · the official hotel-nights pattern (DATATUR, measured 2022–2024; Cozumel) · 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.
