Slovenia’s Adriatic coast is short. It runs from Koper and Izola to Piran and Portorož, at the north-east corner of the Gulf of Trieste, with Croatia around the corner of the bay and Italy across the water. Short does not mean a lake. The gulf is shallow, the Bura falls off the Karst, and a south-westerly sends a sea onto the beaches. This page collects the guides that belong to that coast. Today’s weather is the live board, read with ARSO, the Slovenian Environment Agency.
The one area guide is Piran and Portorož. It covers Koper, Izola, the cliffs at Strunjan, the offshore Bura (burja), southerly and south-westerly seas including the Jugo and the Lebić, and the summer breeze. Read that before you read anything else on this page. The park note for Strunjan is in the park guide, which also says the rules are on the park’s own site.
Piran Bay is a border. Croatian water is close, and so is Italian water. The Piran guide says to check the rules before you cross. This page does not invent those rules.
They are the same three winds as the rest of the Adriatic, with a local accent.
The forecast guide and the go/no-go guide explain the numbers and the habits. The season guide is the shape of the year, without statistics.
Many weeks on this coast include a look at Istria. That is Croatia. Rovinj is the nearer west-coast town. Pula and the Kvarner are the windier side of the same peninsula, and not a casual continuation of a Piran afternoon. Cres and Lošinj are a gulf crossing, not a bay hop. Treat the border as a real line: the forecast may be continuous, and the rules are not.
Navigate Boats covers this coast. The forecast you see is Open-Meteo, asked for the places on the page. DHMZ warnings are a Croatian product. They matter when you are on the Croatian side of the bay. On the Slovenian side, ARSO is the office to read. The about page says who runs the app and where the data comes from. The Croatia and Montenegro hubs are the other two countries.
A typical small-boat day here is a few miles along the shore, not an archipelago. That is a gift when the forecast is doubtful and a temptation when the gulf looks flat. Flat beside the beach is not the same as flat at the middle of the gulf. The Piran guide says this. It is worth saying again, because the coast is so short that people treat it as sheltered by default.
Check today’s go/no-go for your boat
These guides describe typical patterns, not today’s weather. Navigate Boats is a planning aid, not a navigation tool: before you go, check the official marine forecast and warnings from DHMZ (Croatia), ARSO (Slovenia) or the Montenegrin hydrometeorological service, and use your own judgement.
All guides · Live board · Privacy · Terms · Support