Updated 2 Nov 2026 · recomputed nightly
Is September 2027 a good month to visit Oslo?
Lively — the typical September day in Oslo is busier than 56% 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 Oslo's own year — not a headcount.
September sits between the seasons in Oslo: mild and wet, around 17°C / 62°F with rain on about 10 days, Lively on 17 of 30 days — 13 days run Busy or Packed.
Mostly yes. The typical September day in Oslo is Lively, and 13 of the 30 days in our window run Busy or Packed. Expect around 17 °C by day, with rain on about 10 days. The crowd comes with the school holidays in Germany. Cruise ships call on 14 of the 30 days. Late September is the month's quietest stretch in Oslo — the typical day at 54%, against 63% in mid September. The crush is at the Opera roof at golden hour; the quiet is at the Marka forests. The calmest day is Sunday 12 September, the busiest Monday 27 September.
In short, a solid middle-ground pick.
Among the 12 months we forecast for Oslo, September ranks 5th for crowd pressure. Its heaviest day is Mon 27 Sep, busier than 94% of the year; its lightest is Sun 12 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 →
Pack for wet first — rain on 10 of 30 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 Oslo in September?
The busiest days are the cruise Mondays — the 13th, 20th and 27th, with the ships in. Away from those, most days sit Lively. The calmest stretch is the 8th–12th.
Cruise ships are in port on 14 of 30 days; the heaviest is Mon 27 Sep, 1 ship 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 94%, so where you land inside it matters. Daylight runs about 13 hours.
Either side of it, August picks up and October is a little calmer.
The calmest days include the 12th, 15th and 16th — 10 days share that level, so there is room to choose.
Wed 01 Sep Busy busier than 76% of days here · ⚓1 · Germany school holidays
- Nieuw Statendam — guest capacity 2,666
Record Oslo on Wed 1 Sep 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,666 guests at double occupancy. Why: school holidays in Germany. Nearest calmer day: Tue 31 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-01 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Thu 02 Sep Busy busier than 82% of days here · ⚓1 · Germany school holidays
- Britannia — guest capacity 3,647
Record Oslo on Thu 2 Sep 2027 is forecast Busy. 1 cruise ship scheduled, at least 3,647 guests at double occupancy. Why: school holidays in Germany. Nearest calmer day: Tue 31 Aug (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-02 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Fri 03 Sep Busy busier than 74% of days here · ⚓1 · Germany school holidays
- MSC Magnifica — guest capacity 2,506 08:00–16:00
Record Oslo on Fri 3 Sep 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,506 guests at double occupancy; ships in port 08:00–16:00. Why: school holidays in Germany. Nearest calmer day: Sat 4 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-03 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Sat 04 Sep Lively busier than 56% of days here · Germany school holidays
Record Oslo on Sat 4 Sep 2027 is forecast Lively. Why: school holidays in Germany. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-04 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Sun 05 Sep Lively busier than 56% of days here · Germany school holidays
Record Oslo on Sun 5 Sep 2027 is forecast Lively. Why: school holidays in Germany. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-05 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Mon 06 Sep Lively busier than 56% of days here · Germany school holidays
Record Oslo on Mon 6 Sep 2027 is forecast Lively. Why: school holidays in Germany. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-06 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Tue 07 Sep Packed busier than 90% of days here · ⚓2 · Germany school holidays
- AIDAbella — guest capacity 2,050 10:00–18:00
- Rotterdam — guest capacity 2,668
Record Oslo on Tue 7 Sep 2027 is forecast Packed. 2 cruise ships scheduled, at least 4,718 guests at double occupancy. Why: school holidays in Germany. Nearest calmer day: Mon 6 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-07 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Wed 08 Sep Lively busier than 56% of days here · Germany school holidays
Record Oslo on Wed 8 Sep 2027 is forecast Lively. Why: school holidays in Germany. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-08 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Thu 09 Sep Lively busier than 56% of days here · Germany school holidays
Record Oslo on Thu 9 Sep 2027 is forecast Lively. Why: school holidays in Germany. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-09 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Fri 10 Sep Lively busier than 56% of days here · ⚓1 · Germany school holidays
- Europa 2 — guest capacity 516
Record Oslo on Fri 10 Sep 2027 is forecast Lively. 1 cruise ship scheduled, at least 516 guests at double occupancy. Why: school holidays in Germany. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-10 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Sat 11 Sep Lively busier than 56% of days here · Germany school holidays
Record Oslo on Sat 11 Sep 2027 is forecast Lively. Why: school holidays in Germany. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-11 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Sun 12 Sep Lively busier than 54% of days here · Germany school holidays
Record Oslo on Sun 12 Sep 2027 is forecast Lively. Why: school holidays in Germany. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-12 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Mon 13 Sep Packed busier than 88% of days here · ⚓2 · Germany school holidays
- Bolette — size unknown (uncounted)
- MSC Meraviglia — guest capacity 4,488 10:00–18:00
Record Oslo on Mon 13 Sep 2027 is forecast Packed. 2 cruise ships scheduled, at least 4,488 guests at double occupancy, plus 1 of unknown size. Why: school holidays in Germany. Nearest calmer day: Sun 12 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-13 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Tue 14 Sep Busy busier than 79% of days here · ⚓2
- Amera — guest capacity 835 09:00–18:00
- Norwegian Jewel — guest capacity 2,388 07:00–18:00
Record Oslo on Tue 14 Sep 2027 is forecast Busy. 2 cruise ships scheduled, at least 3,223 guests at double occupancy; ships in port 07:00–18:00. Nearest calmer day: Wed 15 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-14 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Wed 15 Sep Lively busier than 54% of days here
Record Oslo on Wed 15 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-15 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Thu 16 Sep Lively busier than 54% of days here
Record Oslo on Thu 16 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-16 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Fri 17 Sep Busy busier than 80% of days here · ⚓2
- MSC Magnifica — guest capacity 2,506 09:00–16:00
- Viking Saturn — guest capacity 930
Record Oslo on Fri 17 Sep 2027 is forecast Busy. 2 cruise ships scheduled, at least 3,436 guests at double occupancy. Nearest calmer day: Thu 16 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-17 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Sat 18 Sep Busy busier than 70% of days here · ⚓1
- AIDAbella — guest capacity 2,050 10:00–18:00
Record Oslo on Sat 18 Sep 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,050 guests at double occupancy; ships in port 10:00–18:00. Nearest calmer day: Sun 19 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-18 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Sun 19 Sep Lively busier than 54% of days here
Record Oslo on Sun 19 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-19 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Mon 20 Sep Packed busier than 91% of days here · ⚓2 · Germany public holiday
- AIDAmar — guest capacity 2,194 08:00–18:00
- Nieuw Statendam — guest capacity 2,666
Record Oslo on Mon 20 Sep 2027 is forecast Packed. 2 cruise ships scheduled, at least 4,860 guests at double occupancy. Why: Germany public holiday. Nearest calmer day: Sun 19 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-20 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Tue 21 Sep Lively busier than 54% of days here
Record Oslo on Tue 21 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-21 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Wed 22 Sep Lively busier than 54% of days here
Record Oslo on Wed 22 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-22 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Thu 23 Sep Lively busier than 54% of days here
Record Oslo on Thu 23 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-23 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Fri 24 Sep Lively busier than 54% of days here
Record Oslo on Fri 24 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-24 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Sat 25 Sep Lively busier than 54% of days here
Record Oslo on Sat 25 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-25 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Sun 26 Sep Busy busier than 82% of days here · ⚓1
- Majestic Princess — guest capacity 3,560 09:00–18:00
Record Oslo on Sun 26 Sep 2027 is forecast Busy. 1 cruise ship scheduled, at least 3,560 guests at double occupancy; ships in port 09:00–18:00. Nearest calmer day: Sat 25 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-26 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Mon 27 Sep Packed busier than 94% of days here · ⚓1
- AIDAnova — guest capacity 5,400 10:00–20:00
Record Oslo on Mon 27 Sep 2027 is forecast Packed. 1 cruise ship scheduled, at least 5,400 guests at double occupancy; ships in port 10:00–20:00. Nearest calmer day: Sun 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/oslo/#d-2027-09-27 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Tue 28 Sep Busy busier than 70% of days here · ⚓1
- AIDAbella — guest capacity 2,050 10:00–18:00
Record Oslo on Tue 28 Sep 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,050 guests at double occupancy; ships in port 10:00–18:00. Nearest calmer day: Thu 30 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-28 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Wed 29 Sep Busy busier than 76% of days here · ⚓1
- Rotterdam — guest capacity 2,668
Record Oslo on Wed 29 Sep 2027 is forecast Busy. 1 cruise ship scheduled, at least 2,668 guests at double occupancy. Nearest calmer day: Thu 30 Sep (Lively). Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/oslo/#d-2027-09-29 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Thu 30 Sep Lively busier than 54% of days here
Record Oslo on Thu 30 Sep 2027 is forecast Lively. The day in full, the year at a glance, and how this day compares: https://avoid-crowds.com/oslo/#d-2027-09-30 (Avoid-Crowds, as of 2 Nov 2026; recomputed nightly.)
Which week of September is quietest in Oslo?
Late September is the month's quietest stretch in Oslo — the typical day at 54%, against 63% in mid September.
Can't move the dates? How to avoid the worst crowds
- Need flexibility? The 8th–12th 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.
September weather in Oslo
Mild — around 17°C / 62°F, with a light jacket for the evenings, with rain on about 10 days, so keep a layer handy.
Worth booking the marquee sights ahead for the busy days, but you can keep the rest of the trip flexible.
More about Oslo in September
Based on: Norway's public holidays · school vacations in Germany · 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.
