Updated 16 Sep 2026 · recomputed nightly
Is December 2026 a good month to visit San Juan?
Packed — December is San Juan's busiest month: the typical day is busier than 89% of its year.
If you are coming for something that only happens in December, that is the trade. If not, September is quieter.
Calm · Lively · Busy · Packed rank a day against San Juan's own year — not a headcount.
December 2026 is peak-season San Juan: hot and wet, around 28°C / 83°F with rain on about 17 days, and Packed on 18 of 31 days.
No. The typical December day in San Juan is Packed, and 25 of the 31 days in our window run Busy or Packed, so most days feel crowded. Expect around 28 °C by day, with rain on about 17 days. Public holidays in Puerto Rico and United States add to it. Cruise ships call on 30 of the 31 days, 5 at once on Tuesday 29 December. Mid December is the month's quietest stretch in San Juan — the typical day at 74%, against 95% in late December. For similar weather with fewer people, come in February or March. The crush is at the Cristo and Fortaleza blocks; the quiet is at the Paseo del Morro. The calmest day is Friday 11 December, the busiest Thursday 17 December.
In short, a hard sell — heavy crowds without the best of the weather.
Among the 12 months we forecast for San Juan, December ranks 2nd for crowd pressure. Its heaviest day is Thu 17 Dec, busier than 99% of the year; its lightest is Fri 11 Dec at 53%.
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 17 of 31 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 San Juan in December?
The busiest days are the 1st, 17th, 29th and 30th, and 21 more. Away from those, most days sit Lively.
Cruise ships are in port on 30 of 31 days; the heaviest is Tue 29 Dec, 5 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 53% of the year and its heaviest at 99%, so where you land inside it matters. All five Tuesdays run Packed. Daylight runs about 11 hours.
Either side of it, November is much calmer and January is a little calmer.
The calmest days are the 5th, 11th and 26th — aim for those if your dates can flex.
Tue 01 Dec Packed busier than 98% of days here · ⚓4
- Carnival Magic — guest capacity 3,690 10:00–18:00
- Eurodam — guest capacity 2,104
- MSC World America — guest capacity 5,240 09:00–23:00
- Norwegian Gem — guest capacity 2,394 10:00–18:00
Record San Juan on Tue 1 Dec 2026 is forecast Packed. 4 cruise ships scheduled, at least 13,428 guests at double occupancy. Nearest calmer day: Mon 30 Nov (Calm). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-01 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 02 Dec Packed busier than 94% of days here · ⚓3
- Harmony Of The Seas — guest capacity 5,707 07:00–15:00
- Regal Princess — guest capacity 3,560 07:00–15:00
- Seven Seas Grandeur — guest capacity 754 08:00–20:00
Record San Juan on Wed 2 Dec 2026 is forecast Packed. 3 cruise ships scheduled, at least 10,021 guests at double occupancy; ships in port 07:00–20:00. Nearest calmer day: Mon 30 Nov (Calm). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-02 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 03 Dec Packed busier than 91% of days here · ⚓3
- Norwegian Bliss — guest capacity 4,056 11:00–19:00
- Silver Shadow — guest capacity 388 09:00–19:00
- Sky Princess — guest capacity 3,668 09:00–17:00
Record San Juan on Thu 3 Dec 2026 is forecast Packed. 3 cruise ships scheduled, at least 8,112 guests at double occupancy; ships in port 09:00–19:00. Nearest calmer day: Fri 4 Dec (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-03 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 04 Dec Busy busier than 71% of days here · ⚓1
- Norwegian Pearl — guest capacity 2,394 07:00–15:00
Record San Juan on Fri 4 Dec 2026 is forecast Busy. 1 cruise ship scheduled, at least 2,394 guests at double occupancy; ships in port 07:00–15:00. Nearest calmer day: Sat 5 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-04 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 05 Dec Lively busier than 56% of days here · ⚓1
- Azamara Journey — guest capacity 710 06:00–18:00
Record San Juan on Sat 5 Dec 2026 is forecast Lively. 1 cruise ship scheduled, at least 710 guests at double occupancy; ships in port 06:00–18:00. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/san-juan/#d-2026-12-05 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 06 Dec Busy busier than 76% of days here · ⚓2
- Brilliant Lady — guest capacity 2,770 08:00–17:00
- Star Pride — guest capacity 343 07:00–19:00
Record San Juan on Sun 6 Dec 2026 is forecast Busy. 2 cruise ships scheduled, at least 3,113 guests at double occupancy; ships in port 07:00–19:00. Nearest calmer day: Sat 5 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-06 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 07 Dec Lively busier than 61% of days here · ⚓1
- Oceania Marina — guest capacity 1,258 07:00–16:00
Record San Juan on Mon 7 Dec 2026 is forecast Lively. 1 cruise ship scheduled, at least 1,258 guests at double occupancy; ships in port 07:00–16:00. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/san-juan/#d-2026-12-07 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 08 Dec Packed busier than 85% of days here · ⚓2
- MSC Meraviglia — guest capacity 4,488 08:00–18:00
- Zuiderdam — guest capacity 1,970
Record San Juan on Tue 8 Dec 2026 is forecast Packed. 2 cruise ships scheduled, at least 6,458 guests at double occupancy. Nearest calmer day: Mon 7 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-08 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 09 Dec Packed busier than 92% of days here · ⚓3
- Harmony Of The Seas — guest capacity 5,707 07:00–15:00
- Resilient Lady — guest capacity 2,770 08:00–17:00
- Seabourn Quest — guest capacity 458 10:00–18:00
Record San Juan on Wed 9 Dec 2026 is forecast Packed. 3 cruise ships scheduled, at least 8,935 guests at double occupancy; ships in port 07:00–18:00. Nearest calmer day: Mon 7 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-09 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 10 Dec Packed busier than 97% of days here · ⚓4
- Carnival Venezia — guest capacity 4,232 07:00–16:00
- Jewel Of The Seas — guest capacity 2,144 12:00–20:00
- Marella Discovery — guest capacity 1,830 07:00–20:00
- Sun Princess — guest capacity 4,300 07:00–15:00
Record San Juan on Thu 10 Dec 2026 is forecast Packed. 4 cruise ships scheduled, at least 12,506 guests at double occupancy; ships in port 07:00–20:00. Nearest calmer day: Fri 11 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-10 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 11 Dec Lively busier than 53% of days here
Record San Juan on Fri 11 Dec 2026 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/san-juan/#d-2026-12-11 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 12 Dec Busy busier than 72% of days here · ⚓2
- Norwegian Pearl — guest capacity 2,394 10:00–18:00
- SeaDream I — guest capacity 112 02:00–?
Record San Juan on Sat 12 Dec 2026 is forecast Busy. 2 cruise ships scheduled, at least 2,506 guests at double occupancy. Nearest calmer day: Fri 11 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-12 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 13 Dec Lively busier than 57% of days here · ⚓3
- Crystal Symphony — guest capacity 606 07:00–18:00
- Explora III — size unknown (uncounted)
- Star Pride — guest capacity 343 07:00–19:00
Record San Juan on Sun 13 Dec 2026 is forecast Lively. 3 cruise ships scheduled, at least 949 guests at double occupancy, plus 1 of unknown size. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/san-juan/#d-2026-12-13 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 14 Dec Lively busier than 61% of days here · ⚓2
- Azamara Quest — guest capacity 722 09:00–17:00
- Silver Ray — guest capacity 556 09:00–19:00
Record San Juan on Mon 14 Dec 2026 is forecast Lively. 2 cruise ships scheduled, at least 1,278 guests at double occupancy; ships in port 09:00–19:00. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/san-juan/#d-2026-12-14 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 15 Dec Packed busier than 96% of days here · ⚓3
- Disney Destiny — guest capacity 2,476 09:00–18:00
- MSC World America — guest capacity 5,240 09:00–23:00
- Norwegian Bliss — guest capacity 4,056 11:00–19:00
Record San Juan on Tue 15 Dec 2026 is forecast Packed. 3 cruise ships scheduled, at least 11,772 guests at double occupancy; ships in port 09:00–23:00. Nearest calmer day: Mon 14 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-15 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 16 Dec Packed busier than 91% of days here · ⚓3
- Carnival Venezia — guest capacity 4,232 13:00–21:00
- Independence Of The Seas — guest capacity 3,836 11:00–19:00
- Oceania Insignia — guest capacity 698 07:00–13:00
Record San Juan on Wed 16 Dec 2026 is forecast Packed. 3 cruise ships scheduled, at least 8,766 guests at double occupancy; ships in port 07:00–21:00. Nearest calmer day: Mon 14 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-16 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 17 Dec Packed busier than 99% of days here · ⚓4
- Carnival Celebration — guest capacity 5,374 07:00–15:00
- Celebrity Beyond — guest capacity 3,276 07:00–16:00
- Nieuw Amsterdam — guest capacity 2,106
- Norwegian Getaway — guest capacity 3,963 10:00–18:00
Record San Juan on Thu 17 Dec 2026 is forecast Packed. 4 cruise ships scheduled, at least 14,719 guests at double occupancy. Nearest calmer day: Fri 18 Dec (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-17 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 18 Dec Busy busier than 83% of days here · ⚓3
- Azamara Journey — guest capacity 710 06:00–18:00
- Seven Seas Splendor — guest capacity 754 08:00–18:00
- Sky Princess — guest capacity 3,668 10:00–18:00
Record San Juan on Fri 18 Dec 2026 is forecast Busy. 3 cruise ships scheduled, at least 5,132 guests at double occupancy; ships in port 06:00–18:00. Nearest calmer day: Mon 14 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-18 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 19 Dec Busy busier than 74% of days here · ⚓2
- Brilliant Lady — guest capacity 2,770 08:00–17:00
- SeaDream II — guest capacity 112
Record San Juan on Sat 19 Dec 2026 is forecast Busy. 2 cruise ships scheduled, at least 2,882 guests at double occupancy. Nearest calmer day: Mon 14 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-19 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 20 Dec Busy busier than 73% of days here · ⚓4
- Explora I — size unknown (uncounted)
- Queen Elizabeth — guest capacity 2,081
- Silver Shadow — guest capacity 388 19:00–?
- Star Pride — guest capacity 343 07:00–19:00
Record San Juan on Sun 20 Dec 2026 is forecast Busy. 4 cruise ships scheduled, at least 2,812 guests at double occupancy, plus 1 of unknown size. Nearest calmer day: Mon 14 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-20 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 21 Dec Packed busier than 89% of days here · ⚓2
- Carnival Magic — guest capacity 3,690 10:00–18:00
- Enchanted Princess — guest capacity 3,660 10:00–18:00
Record San Juan on Mon 21 Dec 2026 is forecast Packed. 2 cruise ships scheduled, at least 7,350 guests at double occupancy; ships in port 10:00–18:00. Nearest calmer day: Sun 20 Dec (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-21 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 22 Dec Packed busier than 87% of days here · ⚓3
- Coral Princess — guest capacity 2,000 10:00–19:00
- Eurodam — guest capacity 2,104
- Resilient Lady — guest capacity 2,770 08:00–17:00
Record San Juan on Tue 22 Dec 2026 is forecast Packed. 3 cruise ships scheduled, at least 6,874 guests at double occupancy. Nearest calmer day: Sun 20 Dec (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-22 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 23 Dec Packed busier than 98% of days here · ⚓4
- Allure Of The Seas — guest capacity 5,492 09:00–18:00
- Carnival Vista — guest capacity 3,934 07:00–15:00
- Seabourn Quest — guest capacity 458 10:00–18:00
- Sun Princess — guest capacity 4,300 07:00–15:00
Record San Juan on Wed 23 Dec 2026 is forecast Packed. 4 cruise ships scheduled, at least 14,184 guests at double occupancy; ships in port 07:00–18:00. Nearest calmer day: Thu 24 Dec (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-23 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 24 Dec Busy busier than 81% of days here · ⚓2 · Puerto Rico public holiday
- Celebrity Beyond — guest capacity 3,276 07:00–15:00
- Seven Seas Prestige — guest capacity 850 08:00–20:00
Record San Juan on Thu 24 Dec 2026 is forecast Busy. 2 cruise ships scheduled, at least 4,126 guests at double occupancy; ships in port 07:00–20:00. Why: Puerto Rico public holiday. Nearest calmer day: Sat 26 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-24 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 25 Dec Packed busier than 93% of days here · ⚓2 · United States public holiday
- MSC Seaside — guest capacity 4,134 08:00–17:00
- Norwegian Getaway — guest capacity 3,963 11:00–19:00
Record San Juan on Fri 25 Dec 2026 is forecast Packed. 2 cruise ships scheduled, at least 8,097 guests at double occupancy; ships in port 08:00–19:00. Why: United States public holiday; Puerto Rico public holiday. Nearest calmer day: Thu 24 Dec (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-25 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 26 Dec Lively busier than 55% of days here · ⚓1
- Crystal Symphony — guest capacity 606 10:00–20:00
Record San Juan on Sat 26 Dec 2026 is forecast Lively. 1 cruise ship scheduled, at least 606 guests at double occupancy; ships in port 10:00–20:00. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/san-juan/#d-2026-12-26 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 27 Dec Packed busier than 97% of days here · ⚓4
- Crown Princess — guest capacity 3,062 06:00–19:00
- Harmony Of The Seas — guest capacity 5,707 07:00–15:00
- Norwegian Bliss — guest capacity 4,056 11:00–19:00
- Star Pride — guest capacity 343 07:00–19:00
Record San Juan on Sun 27 Dec 2026 is forecast Packed. 4 cruise ships scheduled, at least 13,168 guests at double occupancy; ships in port 06:00–19:00. Nearest calmer day: Sat 26 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-27 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 28 Dec Packed busier than 95% of days here · ⚓1
- Explora III — size unknown (uncounted)
Record San Juan on Mon 28 Dec 2026 is forecast Packed. 1 cruise ship scheduled, sizes unknown. Nearest calmer day: Sat 26 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-28 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 29 Dec Packed busier than 99% of days here · ⚓5
- Carnival Magic — guest capacity 3,690 10:00–18:00
- MSC World America — guest capacity 5,240 09:00–23:00
- Regal Princess — guest capacity 3,560 10:00–18:00
- Silver Nova — guest capacity 728 19:00–?
- Zuiderdam — guest capacity 1,970
Record San Juan on Tue 29 Dec 2026 is forecast Packed. 5 cruise ships scheduled, at least 15,188 guests at double occupancy. Nearest calmer day: Sat 26 Dec (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-29 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 30 Dec Packed busier than 99% of days here · ⚓4
- Allure Of The Seas — guest capacity 5,492 08:00–16:00
- Carnival Venezia — guest capacity 4,232 13:00–21:00
- Disney Dream — guest capacity 2,500 09:00–18:00
- Norwegian Pearl — guest capacity 2,394 07:00–15:00
Record San Juan on Wed 30 Dec 2026 is forecast Packed. 4 cruise ships scheduled, at least 14,618 guests at double occupancy; ships in port 07:00–21:00. Nearest calmer day: Fri 1 Jan (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-30 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 31 Dec Packed busier than 96% of days here · ⚓4
- Enchanted Princess — guest capacity 3,660 10:00–17:00
- Explorer Of The Seas — guest capacity 3,286 10:00–17:00
- Marella Discovery — guest capacity 1,830 07:00–20:00
- Sky Princess — guest capacity 3,668 09:00–17:00
Record San Juan on Thu 31 Dec 2026 is forecast Packed. 4 cruise ships scheduled, at least 12,444 guests at double occupancy; ships in port 07:00–20:00. Nearest calmer day: Fri 1 Jan (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-juan/#d-2026-12-31 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Which week of December is quietest in San Juan?
Mid December is the month's quietest stretch in San Juan — the typical day at 74%, against 95% in late December.
Can't move the dates? How to avoid the worst crowds
- The heaviest port day is Tue 29 Dec — 5 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.
December weather in San Juan
Real heat — around 28°C / 83°F by day, so pace the afternoons and carry water, with rain on about 17 days, so keep a layer handy.
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 San Juan in December
Based on: Puerto Rico's 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.
