Why the water is so clear
The Croatian coast is known for some of the clearest water in the Mediterranean. Much of the shoreline is made of limestone rock and pebbles rather than fine sand, so there is little sediment to cloud the sea. On a calm day around Split, you can often see the seabed many metres down from the surface.
That makes the region excellent for snorkelling, even if you are a beginner with nothing more than a mask and a pair of fins.
Close to the city
You don't have to go far. The rocky shoreline around Marjan, the wooded hill on Split's peninsula, has numerous small coves and swimming platforms with good snorkelling. Kašjuni beach on the southern side of the hill is a favourite, with clear water and rocks that attract small fish.
Along these rocks, look out for bream, wrasse in bright colours, shoals of tiny silvery fish and the occasional octopus hiding in a crevice. Seagrass meadows, which are important nurseries for marine life, often begin a short swim from shore.
A good habit is to swim slowly along the edge where rock meets seagrass or sand. That boundary is where most marine life gathers, and moving gently means fish are less likely to dart away.
Day trips by boat
Boat trips from Split visit nearby islands and secluded bays where the snorkelling is even better. Many tours include stops at sheltered lagoons and provide masks and snorkels, though bringing your own mask means a better fit.
The island of Šolta, a short hop from the city, has quiet bays that see fewer visitors than better-known islands. Further afield, the sea caves and coves around Vis and the islet of Biševo are popular for their brilliant colours on sunny days, though conditions and access depend on the weather.
Staying safe
Sea urchins are common on Adriatic rocks, so water shoes are wise when entering and leaving the sea. Watch out for boat traffic, particularly near harbours and popular bays, and consider using a brightly coloured swim buoy so that skippers can see you.
Water temperatures are usually most comfortable from late June to September. Earlier or later in the season, a thin wetsuit makes longer sessions much more enjoyable. If you are bringing fins or a wetsuit, a Classic fare's 23 kg checked bag gives you plenty of room.
Good to know
- Wear water shoes to protect your feet from sea urchins.
- Use a swim buoy when snorkelling away from the shore.
- Mornings are often calmest, with the best visibility.