A blob of warm, dry Saharan air is drifting north from Africa and is about to nudge European temperatures upward — but in Croatia, the story is a bit more interesting than a simple late-September warm-up.
Meteorologist Bojan Lipovščak, speaking on N1 Television, explains the setup: a deep, slow-moving cyclone sits in the Atlantic between Iceland and Great Britain, its eastward path blocked by a dome of high pressure parked over central and eastern Europe. From the front side of that cyclone, southeast upper-level flow is pulling Saharan-origin air across the continent. Meanwhile, the high pressure over Croatia itself is locking in clear, settled conditions.
For anyone travelling to the Adriatic in the coming days, that means classic autumn shoulder-season weather: sunny skies, highs of 22–27 °C inland and on the coast, and mornings cool enough to bite. In fact, clear nights are dropping inland temperatures so low that light ground frost is possible, and daily swings of up to 20 °C are on the cards. Pack layers — a morning around 8 °C inland can easily become a t-shirt afternoon, with the coast sitting milder at around 15 °C at dawn.
Winds are part of the picture too. A weak to moderate anticyclonic bura is blowing along the coast and islands, with the far south of Dalmatia seeing gusty bura spells. Expect the usual daytime maestral on the Adriatic, plus tramontana in places. Tuesday should be a degree or two warmer than Monday after any local morning fog clears.
The extended outlook is just as useful for trip planning: warm, stable weather looks set to hold all week, with the next real change — rain and cooler air — likely only around 10 October. If you were hoping to squeeze in a late-season swim, note that the bura has pushed the warm surface layer of the sea out toward the open Adriatic, so water temperatures have dropped to 22–24 °C. That's still swimmable for most, but noticeably fresher than a few weeks ago.
For travellers, this is exactly the kind of window that makes the Adriatic shoulder season so appealing: warm sunshine, thin crowds, lower prices, and conditions comfortable for hiking, sightseeing, or long coastal lunches — as long as you're prepared for chilly mornings and the odd gusty bura day. Just don't assume the beach weather will last forever; the forecast suggests the first proper autumn rain arrives in early October.
