Updated 16 Sep 2026 · recomputed nightly
Is September 2026 a good month to visit Split?
Busy — the typical September day in Split is busier than 72% of its year.
If you are coming for something that only happens in September, that is the trade. If not, January is quieter.
Calm · Lively · Busy · Packed rank a day against Split's own year — not a headcount.
September is one of Split's busiest months: warm and showery, around 27°C / 80°F with rain on about 8 days, and Busy on 8 of 15 days. (Our forecast covers 16–30 September — the rest of September is beyond the current window.)
It depends. The typical September day in Split is Busy, and 10 of the 15 days in our window run Busy or Packed, so most days feel crowded. Expect around 27 °C by day, with rain on about 8 days. Public holidays in Germany and the Czechia add to it. Cruise ships call on 11 of the 15 days, 3 at once on Friday 25 September. For similar weather with fewer people, come in May or October. The crush is at the Peristyle and the palace lanes; the quiet is at Marjan's pine paths. The calmest day is Wednesday 16 September, the busiest Friday 25 September.
In short, worth it for the peak buzz, if you can take the crowds.
Among the 12 months we forecast for Split, September ranks 3rd for crowd pressure. Its heaviest day is Fri 25 Sep, busier than 92% of the year; its lightest is Wed 16 Sep at 54%.
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 8 of 30 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 Split in September?
The busiest days are the 18th, 19th, 25th and 27th, and 6 more. Away from those, most days sit Lively.
Cruise ships are in port on 11 of 15 days; the heaviest is Fri 25 Sep, 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 54% of the year and its heaviest at 92%, so where you land inside it matters. Daylight runs about 12 hours.
Either side of it, August is busier still and October is about half as busy.
The calmest days are the 16th, 17th and 20th — aim for those if your dates can flex.
Wed 16 Sep Lively busier than 54% of days here
Record Split on Wed 16 Sep 2026 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/split/#d-2026-09-16 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 17 Sep Lively busier than 54% of days here · ⚓1
- World Traveller — guest capacity 196 10:00–23:00
Record Split on Thu 17 Sep 2026 is forecast Lively. 1 cruise ship scheduled, at least 196 guests at double occupancy; ships in port 10:00–23:00. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/split/#d-2026-09-17 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 18 Sep Busy busier than 82% of days here · ⚓2
- Costa Deliziosa — guest capacity 2,260 08:00–17:00
- Mein Schiff 4 — guest capacity 2,506 08:00–19:00
Record Split on Fri 18 Sep 2026 is forecast Busy. 2 cruise ships scheduled, at least 4,766 guests at double occupancy; ships in port 08:00–19:00. Nearest calmer day: Thu 17 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-18 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 19 Sep Busy busier than 84% of days here · ⚓2
- Enchanted Princess — guest capacity 3,660 07:00–16:00
- MSC Armonia — guest capacity 1,950 08:00–17:00
Record Split on Sat 19 Sep 2026 is forecast Busy. 2 cruise ships scheduled, at least 5,610 guests at double occupancy; ships in port 07:00–17:00. Nearest calmer day: Sun 20 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-19 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 20 Sep Lively busier than 55% of days here · Germany public holiday
Record Split on Sun 20 Sep 2026 is forecast Lively. Why: Germany public holiday. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/split/#d-2026-09-20 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 21 Sep Lively busier than 56% of days here · ⚓1
- Wind Surf — guest capacity 342 08:00–16:00
Record Split on Mon 21 Sep 2026 is forecast Lively. 1 cruise ship scheduled, at least 342 guests at double occupancy; ships in port 08:00–16:00. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/split/#d-2026-09-21 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 22 Sep Busy busier than 72% of days here · ⚓2
- Marella Voyager — guest capacity 1,814 08:00–17:00
- Viking Star — guest capacity 930
Record Split on Tue 22 Sep 2026 is forecast Busy. 2 cruise ships scheduled, at least 2,744 guests at double occupancy. Nearest calmer day: Mon 21 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-22 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 23 Sep Busy busier than 68% of days here · ⚓1
- Brilliance Of The Seas — guest capacity 2,112 09:00–18:00
Record Split on Wed 23 Sep 2026 is forecast Busy. 1 cruise ship scheduled, at least 2,112 guests at double occupancy; ships in port 09:00–18:00. Nearest calmer day: Mon 21 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-23 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 24 Sep Busy busier than 80% of days here · ⚓1
- Celebrity Ascent — guest capacity 3,260 08:00–20:00
Record Split on Thu 24 Sep 2026 is forecast Busy. 1 cruise ship scheduled, at least 3,260 guests at double occupancy; ships in port 08:00–20:00. Nearest calmer day: Mon 21 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-24 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 25 Sep Packed busier than 92% of days here · ⚓3
- Explorer Of The Seas — guest capacity 3,286 08:00–17:00
- Norwegian Gem — guest capacity 2,394 07:00–17:00
- ms Oosterdam — guest capacity 1,916 07:00–16:00
Record Split on Fri 25 Sep 2026 is forecast Packed. 3 cruise ships scheduled, at least 7,596 guests at double occupancy; ships in port 07:00–17:00. Nearest calmer day: Thu 24 Sep (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-25 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 26 Sep Busy busier than 66% of days here · ⚓1
- MSC Armonia — guest capacity 1,950 08:00–17:00
Record Split on Sat 26 Sep 2026 is forecast Busy. 1 cruise ship scheduled, at least 1,950 guests at double occupancy; ships in port 08:00–17:00. Nearest calmer day: Mon 28 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-26 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 27 Sep Packed busier than 87% of days here · ⚓2
- Azura — guest capacity 3,100
- Celebrity Eclipse — guest capacity 2,850 07:00–17:00
Record Split on Sun 27 Sep 2026 is forecast Packed. 2 cruise ships scheduled, at least 5,950 guests at double occupancy. Nearest calmer day: Sat 26 Sep (Busy). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-27 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 28 Sep Lively busier than 55% of days here · ⚓2 · Czechia public holiday
- Emerald Kaia — guest capacity 128
- ms La Belle de lAdriatique — guest capacity 99 14:00–17:00
Record Split on Mon 28 Sep 2026 is forecast Lively. Why: Czechia public holiday. 2 cruise ships scheduled, at least 227 guests at double occupancy. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/split/#d-2026-09-28 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 29 Sep Busy busier than 82% of days here · ⚓2
- Celebrity Eclipse — guest capacity 2,850 08:00–19:00
- Marella Explorer 2 — guest capacity 1,814 09:00–18:00
Record Split on Tue 29 Sep 2026 is forecast Busy. 2 cruise ships scheduled, at least 4,664 guests at double occupancy; ships in port 08:00–19:00. Nearest calmer day: Mon 28 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-29 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 30 Sep Busy busier than 72% of days here · ⚓1
- Celebrity Constellation — guest capacity 2,130 08:00–19:00
Record Split on Wed 30 Sep 2026 is forecast Busy. 1 cruise ship scheduled, at least 2,130 guests at double occupancy; ships in port 08:00–19:00. Nearest calmer day: Thu 1 Oct (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/split/#d-2026-09-30 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Can't move the dates? How to avoid the worst crowds
- The heaviest port day is Fri 25 Sep — 3 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.
September weather in Split
Comfortably warm — around 27°C / 80°F, easy shirtsleeve weather, with rain on about 8 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 Split in September
Based on: Croatia's public holidays · school vacations across Czechia, Germany, the Netherlands and Poland · the season pattern from official overnight stays · 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.
