Can you swim in Croatia in September?
Yes — perfect swimming weather
Average sea
23°C
Feels
warm
Month
September
The short answer
The sea around Croatia averages 23°C in September. That is warm enough for relaxed all-day swimming without a wetsuit. Families, snorkellers and casual bathers will find conditions comfortable on most beaches.
Live conditions matter most
Monthly averages set expectations, but a specific beach today depends on wind, waves and local currents. Use the live map or any beach page to see right-now temperatures.
Top swimming beaches in Croatia
Bijeca Beach
Istria
Rare Istrian sandy beach with shallow water.
Hawaii Beach
Istria
Sheltered pine-backed Istrian swim bay.
Ambrela
Istria
Pebble-and-rock family beach near Pula.
Belvedere
Istria
Naturist rocky-cliff swimming spot.
Lone Bay
Istria
Forest-rimmed pebble Rovinj bay.
Sveti Ivan
Kvarner
Steep-descent pebble cove on Cres island.