One day
The palace in the morning, lunch in Varoš, Marjan for sunset. You will see the best of the city and none of the coast, and you will wish you had another day. One day is enough to understand why Split is worth coming back to, and not enough to do anything except come back.
Two days
Add a beach afternoon at Kašjuni, the Meštrović Gallery, and a proper dinner. This is the minimum that feels unhurried — you see the palace, you swim, you eat, and you do not leave feeling you missed the sea. Most people who have two days end up wishing they had three.
Three days
Add one full day out: Hvar, Brač, Krka or the Blue Cave. Choose one — trying to fit two makes both worse, and the travel time eats the day. Three days is the sweet spot for a first visit: the city plus one island or one park, and enough evenings to eat at two konobas and go back to the one you liked.
Four to five
Now Split is a base. Two island days, one park day, and enough evenings left to eat properly and go back to the places you liked. At five days you can add a day trip to Hvar and a day trip to Krka and still have a beach day and a palace day, which is the full Split experience. Beyond five, you are either touring the coast or you are on holiday and not counting.
A week or more
Split is a good base for a week if you are happy to come back to the same bed each night and take a different day trip each day. Hvar, Brač, Vis, Krka, the Blue Cave, Omiš and Klis are all within reach, and you can swim in the city every morning before the boat leaves. Beyond a week, consider splitting the trip between Split and an island — three nights in Hvar town and four in Split is a better holiday than seven in one place.
The one-day itinerary has the hour-by-hour version.
Getting from Split airport to the city
Using Split's ferry port
Buses, taxis and parking in Split
Is Split expensive?
Things to do in Split
Split in two days
The best beaches in Split