This page carries no dimension, date or ticket rule for Dubrovnik’s old town, because none is in a source it can name. What is published is the calendar: 9.8 days at or above 30 °C in August against 0.7 in September, and 120.1 mm of October rain.
What the national record holds, and what it does not
Croatia’s Register of Cultural Goods contained 8,999 entries when it was last checked, on 4 August 2026, 31 of them UNESCO listings. Those are national totals and they are the whole of what this site holds. The per-entry records are not pulled here, so nothing on this page will tell you what is listed inside this quarter, how many buildings are covered, or which protection category applies to any of them. A national total cannot be divided by a town.
That matters more here than almost anywhere else in the country, because this is among the most written-about places in it, and much of what is written about it is a list of monuments with confident figures attached and no source under any of them. A dimension nobody can attribute is not a fact, and a date recalled rather than looked up is worse than no date. What can be attributed for this exact quarter is a climate record and a ferry register, and between them they settle the two things a visitor actually decides: which month, and which day of the week.
The two months that read the same and are not
Read the days-above-30 column first and the rest of the table falls into place. A visit here is spent outdoors and on foot, usually across the middle of the day, which is the one case where that column matters more than the mean temperature beside it: the constraint is not whether the weather is pleasant but whether three hours of standing about in it are.
| Month | Mean daily max | Days ≥30 °C | Sunshine, hours a day | Rainfall mm | Rain days |
|---|---|---|---|---|---|
| June | 25.3 °C | 1.4 | 10.4 | 44.0 | 4.4 |
| July | 28.2 °C | 7.7 | 11.2 | 28.3 | 3.1 |
| August | 28.5 °C | 9.8 | 10.5 | 72.5 | 3.8 |
| September | 25.1 °C | 0.7 | 10.3 | 86.1 | 5.4 |
| October | 21.1 °C | 0.0 | 6.1 | 120.1 | 8.2 |
| November | 16.6 °C | 0.0 | 4.5 | 142.3 | 10.1 |
August and September have a mean daily maximum 3.4 °C apart, which sounds like a small difference and is not. The count of days at or above 30 °C falls from 9.8 to 0.7 across that gap — September keeps about one day in fourteen of August’s hot days — while sunshine barely moves, 10.5 hours a day against 10.3. The quarter does not change. What standing in it costs does.
9.8 → 0.7
days at or above 30 °C at the Dubrovnik station in August and in September, on sunshine of 10.5 and 10.3 hours a day
The interaction below sets the two months side by side with the figures that usually get traded against each other: the heat, the water and the rain.
days at or above 30 °C
The warmest sea of the year, and the warmest air with it
A mean daily maximum of 28.5 °C, 10.5 hours of sun a day and a sea at 23.3 °C. Rainfall has already risen to 72.5 mm from July’s 28.3 mm, across 3.8 wet days.
Set out like that, the usual argument for August collapses. What the month buys over September is 1.5 °C of sea, 0.2 of an hour of daylight and 13.6 mm less rain. What it costs is 9.1 days at or above 30 °C, every one of them spent outdoors. That is not a close trade, and it is the whole of the case for moving the dates rather than the itinerary.
Paying August for a sea that September keeps anyway
The sea is the reason most people give for fixing a Dubrovnik trip inside August, and the published series does not support it. The Dubrovnik station records 23.3 °C in August, 21.8 °C in September and 19.5 °C as late as October. The water argument survives the change of month almost intact; the heat argument does not survive it at all, falling from 9.8 days above 30 °C to 0.7.
The one thing September does not buy is a cheaper crossing: the seasonal ferry tariff runs to 27 September on every line checked, so the fare stays at peak while the network behind it has already contracted — line 9807 stops running its full route on 30 August. Move for the temperature, not for the price. What is reachable by sea sets out which legs disappear first.
The week matters as much as the month
The second decision is which day, and it is the one nobody checks. Line 807, the passenger ship serving the islands off the city, runs four sailings a day Monday to Saturday and two on Sundays and public holidays — and Croatia does not move public holidays to the nearest Monday, so a holiday falling mid-week cuts the service on the date it falls rather than on a convenient one. A day planned around four crossings becomes one island, out and back, on two.
Which is the practical shape of a stay here: the quarter itself is a morning-and-evening proposition for most of the summer, the water is the middle of the day, and the escape by sea is a weekday. The full twelve-month record carries every station figure quoted above, the island group holds the sailing pattern, and staying inside the quarter is a separate decision from visiting it.
Common questions
When is Dubrovnik old town least uncomfortable to walk?
By the published record, September: 0.7 days at or above 30 °C against August’s 9.8, on 10.3 hours of sunshine a day. June is the other candidate, at 1.4 days and 44.0 mm of rain, the second-driest month of the year here.
Does this page have opening hours or ticket prices?
No, and it will not. No admission rule, hour or price for anything in Croatia is in the sources this site publishes from, so quoting one would mean recalling it. Check the operator’s own published information on the day.
Is October too late?
The sea is still 19.5 °C and no day reaches 30 °C, but rainfall is 120.1 mm across 8.2 wet days and sunshine drops to 6.1 hours a day from September’s 10.3 — the sharpest month-to-month fall in the eight-station set.
How many listed buildings are in the old town?
This site does not know. The Register of Cultural Goods held 8,999 entries and 31 UNESCO listings nationally on 4 August 2026, and those totals are not broken down by town in anything published here.
What do you need to work out next?
The month and the weekday are the decisions. These come next.
Where to stay
Which rooms sit inside the walls themselves?
Croatia's cultural register held 8,999 protected entries on 4 August 2026.
Getting around
What can you reach from the city by sea?
Four sailings a day to the islands Monday to Saturday, two on Sundays.
When to go
Does October still work here?
Sea at 19.5 °C, 120.1 mm of rain, and sunshine down to 6.1 hours a day.
Planning
Which day should the walking tour go on?
Line 807 halves on Sundays and holidays, and Croatia does not move holidays to Monday.
Climate data: DHMZ (meteo.hr), climate normals 1971–2000. Cultural property counts: Register of Cultural Goods of the Republic of Croatia, as at 4 August 2026. Ferry data: Agencija za obalni linijski pomorski promet (ZOLPP), 2026 state coastal line register and per-line timetables.