From sea kayaking under Marjan to a konoba dinner in Varoš, these are the activities we would actually spend our own money on — with real prices, honest durations and where to book.
Five hours to Šolta and back on a ten-person boat: three swim stops in coves you cannot reach by road, an hour in Maslinica for dinner or a drink, and the run home across the channel as the sun goes down behind the island.
The most Split thing you can do for ten euros. Poljud is a listed 1979 shell of a stadium, the Torcida have been going since 1950, and a mid-table league game on a Saturday night tells you more about this city than any walking tour will.
The south side of Marjan drops straight into clear water over rock rather than sand, which is exactly what you want and exactly what the city beaches are not. Bring a mask, walk in off the stones at Kašjuni or Bene, and it costs nothing.
Croatian law lets anyone drive a boat under 5 kW without a licence, which is enough to potter round a bay at walking pace and reach coves the buses do not. Around €57 a day out of season and €88 in August, and nobody will ask you anything except for a deposit.
The noisy end of the Split waterfront, and the only place near the city with the full concession: parasail, jet ski, banana, tube, pedalo. Nobody will pretend it is authentic. It is, however, exactly what a bored eleven-year-old wants at four in the afternoon.
A genuinely good rainy-day answer in a city with few of them. Several rooms in and around the old town run in English, take two to six players, and cost €60–80 for the room rather than per person.