The weather and sea are consistently warm enough to entice visitors to the beach along the Adriatic coast with a temperature range between 61-73 degrees Fahrenheit. You’ll want to pack your swimsuit and sunscreen alongside warm layers and if you’re planning on heading inland, pack your umbrella.
Ljubljana and the western part of Slovenia’s interior see temperatures range from 55-75 degrees and has some of the year’s wettest weather. Heading to the alpine northwest, like Bled and Kranjska Gora you can expect temperatures to be an additional 8 degrees cooler.
Crowds & Costs
You’re still ahead of the tourist crush that July and August bring and hotel prices are marginally less costly, though with the warmer and sunnier weather you can expect an uptick in visitors and prices. And with the ever-increasing crowds, hotels start to fill up fast, so book in advance, especially toward the middle of the month.
Where to Go
The Gulf of Trieste is warm and the sun is shining, making June a great time to explore the Adriatic coastline and the medieval Mediterranean port towns of Slovenia's Istrian Peninsula.
Begin in Piran, taking in the Venetian gothic influence, traveling a short distance up the coast to the often overlooked, but less crowded, Izola and then on to Koper next for stunning 15th-century architecture, like the Praetorian Palace.
A popular next stop is to explore the impressive Škocjan and Postojna cave systems and the must-see Predjama Castle, before turning west into Goriška Brda and wine country. Continuing northwest to Bovec and Triglav National Park and through the Julian Alps to popular Lake Bled and Bohinj.
End your stay in historic Ljubljana, or using the capital as a jumping off point to explore the fantasy realm of Velika Planina to its north and Celje, Pjuj, and Maribor to its east.
Read Top Regions of Slovenia: Where & How to Go for more great route options.
What to Do
This is still a good month to check out the cultural sites, although the key attractions will begin to feel crowded by the end of June. With that said, stroll the charming narrow streets, picnic in the parks, and people watch from the many outdoor cafés in Ljubljana along the Ljubljanica River and if you timed your trip well, take in an outdoor summer concert at Križanke Outdoor Theatre.
While in the capital, oenophiles will appreciate sampling wine from every region of the country in one locale for the Ljubljana Wine Route – an event that attracts wineries from across the country. Complete your stay with a trip to Maribor in the east of the country to check out the world’s oldest grape-producing vine, at 400 years old! And for a truly exceptional experience, stay the night in style at the vineyard glamping resort, Chateau Ramšak, in the Styria wine region just outside of Maribor.
For more unique lodging options, check out this article.
June is a great month for being outdoors and the Soča Valley is the place to do it. Swim, raft or kayak the emerald-green Soča River and hike along Tolminka Gorge. For more great swimming options, head to Lake Bohinj and to Fužina Bay or Ukanc where you can also surf, kayak, canoe, and even fish and dive.
Events in June
Lace Festival. Idrija celebrates everything to do with lace and includes a gala opening, lace-making exhibitions, and live music.
Jurjevanje. Črnomelj hosts one of its oldest folklore festivals.
Lent Festival. Maribor’s Old Town hosts a two-week folklore and cultural festival with performances of every kind, from theater and ballet to comedians and acrobats, from opera to jazz.
Medieval Days. Bled Castle hosts Medieval Days at the start of the month in honor of the castle’s importance in Slovene history.
Ljubljana Jazz Festival. The capital hosts Europe’s oldest jazz festival attracting world-renowned musicians to perform at the open-air venue Križanke.
Traveling to Slovenia in June? Check out these great itineraries.
Slovenia Alpine Adventure: Triglav, Lake Bled & The Soča Valley - 13 Days. Experience the best of Slovenia's Alpine region on this epic 13-day trip. Start with two nights in the resort town of Lake Bled and then begin five days of hiking through the Julian Alps. From here, take a self-guided drive through Soča River Valley, continuing to the Goriška Brda wine country, and ending in the romantic riverside capital of Ljubljana.
Highlights of Slovenia - 5 Days. Starting from the laid-back riverside cafés of Ljubljana, you'll drive to the scenic shores of Lake Bled, the rocky passes of the Julian Alps, and the rolling hills of Goriška Brda wine region before finishing along the Adriatic coast.