September is one of the best months to visit Split. Expect daytime highs around 26°C, nights near 17°C and roughly 6 rainy days across the month. Heat eases toward comfortable 26C afternoons and the sea is at its warmest, while cruise numbers and prices slip after the first week. Early-to-mid September is one of the smartest windows of the year for the palace, Marjan and the islands, with light that turns golden on the stone.
Day high
26°C
Night low
17°C
Rainy days
≈ 6
Verdict
Go
September is high demand: book 4 to 6 weeks out to keep these prices realistic.
Special occasions€€€Inside the Roman palace · Diocletian's Palace (Old Town)
A small design hotel built into the ancient stone of Diocletian's Palace, steps from the Vestibule and the Peristyle at the very heart of the old town. Exposed Roman and medieval walls meet clean modern rooms, and you sleep inside the monument itself.
from ~260 EUR/night
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Couples€€Belle Epoque by the beach · Bacvice
A restored 1921 grand hotel above Bacvice beach, with a palm-shaded terrace and a short walk along the water to the old town. It is the elegant, calmer choice, close to the sand but out of the palace crush.
from ~165 EUR/night
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First visit€€Seafront modern · Riva and Meje
A modern four-star on the western waterfront toward Meje, with sea-view rooms and a rooftop looking back to the harbour. It is a flat ten-minute walk along the coast to the Riva and the palace, away from the night noise.
from ~140 EUR/night
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Budget€Varos hostel · Varos
A friendly, well-run hostel in a stone house in the old Varos quarter just west of the centre, with dorms and a couple of private rooms and apartments. It is a five-minute walk to the Riva and one of the best-value beds in Split.
from ~25 EUR/night
Check pricesReal hotel photos · prices are indicative from-rates, not live quotes · booking links support the site at no extra cost
With highs around 26°C, September is outdoor weather: prioritize viewpoints, parks and long walks.
Diocletian's Palace and the Peristyle
TipThe palace is not a ticketed site but the living old town itself, free to wander at any hour, so walk the marble lanes at 7am or after dinner for empty photos before and after the cruise groups fill them. Head for the Peristyle, the colonnaded imperial courtyard at its heart, where a costumed Roman guard poses by the black Egyptian sphinx brought here in Diocletian's time and cafe cushions spill down the ancient steps.
Cathedral of St Domnius and Bell Tower
TipThe cathedral was built as Diocletian's own mausoleum, making it one of the oldest buildings used as a church anywhere, and the emperor who persecuted Christians now lies replaced by the relics of the martyr he killed. A combined ticket of a few euros covers the church, the crypt and the treasury; pay the extra to climb the steep, narrow Romanesque bell tower for the finest view over the red rooftops and the harbour, but it is not for anyone unsteady on open stairs.
Diocletian's Cellars (Substructures)
TipThese vast vaulted halls under the southern half of the palace held the emperor's storerooms and now mirror the shape of the imperial apartments that stood above, kept cool and atmospheric year round. The central passage that links the Riva to the Peristyle is free to walk through and lined with craft stalls, while the ticketed side chambers of a few euros are where Daenerys kept her dragons in Game of Thrones.
The Riva Waterfront
TipThe Riva is Split's palm-lined marble seafront promenade, running along the harbour below the white southern wall of the palace, and it is the city's living room where locals take their evening stroll and morning coffee. It is free and always open, so time a coffee here for late afternoon when the light hits the palace wall, and it is the front row for the Advent lights in December and festival stages in summer.
Ready to plan the full trip? Start from the 2-day Split itinerary.
September is one of the best months to visit Split. Expect daytime highs around 26°C, nights near 17°C and roughly 6 rainy days across the month. Heat eases toward comfortable 26C afternoons and the sea is at its warmest, while cruise numbers and prices slip after the first week. Early-to-mid September is one of the smartest windows of the year for the palace, Marjan and the islands, with light that turns golden on the stone.
Typical September days in Split reach about 26°C, dropping to around 17°C at night. Layers work best.
Count on roughly 6 days with rain in September. Rain rarely lasts all day, so plans hold up well.