Split’s old town is a stone quarter at a station that records a 30.0°C mean daily maximum in July and 16.5 days at or above 30°C. By September that falls to 1.1 days. The ferry terminal sits against the walls, which fixes when it is busiest.
What the national record actually holds
Croatia’s Register of Cultural Goods contained 8,999 entries when it was last checked, on 4 August 2026, of which 31 are UNESCO listings. Those are national totals and they are all this site holds. The per-entry records are not pulled here, so this page will not tell you what is listed inside the old town, how many buildings are covered or which protection category applies to any of them.
That is worth stating plainly because the alternative is what most pages about this place do: recite a list of monuments with dates attached to them and no source for any of it. A figure that cannot be attributed is not a figure. What can be attributed, for this exact square kilometre, is a climate record and a ferry register — and between them they answer the two questions that actually change a visit.
8,999
entries in the national Register of Cultural Goods, 31 of them UNESCO listings, as at 4 August 2026 — totals only, with no per-entry detail held here
The first question is when to walk it. A dense stone quarter has almost no shade at midday, holds heat into the evening and funnels every visitor through the same few passages. That makes the temperature record more useful here than in most places, because the constraint is not whether the weather is pleasant but whether standing on hot limestone for three hours is.
| Month | Mean daily max | Days ≥30°C | Days ≥25°C | Sunshine, hours a day | Rain days |
|---|---|---|---|---|---|
| May | 22.7°C | 0.1 | 9.1 | 8.8 | 6.6 |
| June | 26.8°C | 5.0 | 22.0 | 10.2 | 5.7 |
| July | 30.0°C | 16.5 | 29.5 | 11.2 | 3.3 |
| August | 29.7°C | 15.7 | 29.0 | 10.3 | 3.8 |
| September | 24.9°C | 1.1 | 15.4 | 8.2 | 5.8 |
| October | 19.9°C | 0.0 | 1.3 | 6.2 | 7.6 |
July and August are the two months that read the same and are not quite: 16.5 days at or above 30°C against 15.7, on a mean daily maximum of 30.0°C against 29.7. September is where the record breaks in half. The mean daily maximum drops to 24.9°C, days above 30°C fall to 1.1, and 15.4 days still reach 25°C. That is the same city in a different condition, and it costs nothing in daylight: 8.2 hours of sunshine a day against July’s 11.2.
The rain column is the reason nobody should plan a stone-quarter city break for November or December on temperature alone. Split records 9.1 rain days in November against 3.3 in July, and the long-run Split Marjan series, 1948–2024, puts November rainfall at 115.5 mm. Those are two different datasets and should not be mixed in one table, but they point the same way.
The terminal is inside the city
The second question is what the old town is for on any given day, and the answer is partly decided by the fact that Split’s ferry berths are on the harbour front immediately against it. 23 scheduled services touch this port: 10 state lines with a year-round public service obligation and 13 commercial catamarans running to summer demand. Every one of them loads and unloads a few minutes’ walk from the walls.
There is no other historic centre in Croatia arranged like that, and it has two consequences. The pleasant one is that the old town works as a place to stand around in for an hour before a boat, which is why so many itineraries treat it as a transit stop rather than a destination. The unpleasant one is that the quarter absorbs the arrival and departure peaks of the largest ferry network in the country, on top of everyone who came for the city itself.
Walking the old town in the middle of a July afternoon
The heat record is the cost. Split logs 16.5 days at or above 30°C in July and 11.2 hours of sunshine a day, and the walled quarter has neither breeze nor much shade. The people who suffer most are day visitors off a boat, who have a fixed return sailing and so have no choice about which hours they are on their feet.
The fix is scheduling rather than avoidance. Walk it early or after six; use the middle of the day for something with a roof or a sea in it; and if the dates are flexible at all, move them to September, where the same city records 1.1 days above 30°C instead of 16.5. If they are not flexible, structure the day around the water and keep the walking for the ends of it.
None of that requires knowing which century a given wall belongs to, and that is rather the point. The decisions a visitor actually makes here are about hours and dates, and those are the two things a sourced record can settle. For the network the terminal belongs to, the Split map sets out which lines leave from the city and which only look as though they do.
If the trip is being built around this quarter specifically, the strongest single move is to shift it out of high summer. The city’s season, measured in days above 25°C, runs 22.0 in June, 29.5 in July, 29.0 in August and 15.4 in September, and the difference in what the streets feel like across that range is much larger than the three-degree difference in mean air temperature suggests.
What do you need to work out next?
The hours and the dates are the decisions. These come next.
Where to stay
Is there a heritage room in the centre?
Split Marjan’s 1948-2024 series records 353.3 hours of sunshine in July.
Getting around
What leaves from the harbour front?
Ten state lines sail from the city; seven more leave from other ports.
When to go
How much cooler is September?
1.1 days at or above 30°C, against 16.5 in July.
Planning
What is the walk above the old town?
Split Marjan’s 1948-2024 series counts 17 days above 25 degrees in September.
Climate data: DHMZ (meteo.hr), climate normals 1971–2000. Climate data: DHMZ (meteo.hr), Split Marjan station, 1948–2024. Ferry data: Agencija za obalni linijski pomorski promet (ZOLPP), 2026 state coastal line register and per-line timetables. Cultural property counts: Register of Cultural Goods of the Republic of Croatia, 8,999 entries and 31 UNESCO listings, as at 4 August 2026.