Croatia in September
Warm seas, golden light, wine harvest season and thinning crowds — why September may be the perfect month to visit Croatia.
Overview
September is Croatia at its finest. The summer heat softens into warm, golden days, the Adriatic is at its warmest temperature of the year, and the crowds that pack the coast in July and August thin out noticeably — especially from mid-month onwards. It is the sweet spot where summer and autumn overlap.
For many experienced travellers, September is the best month to visit Croatia. You get reliable warm weather (22-28 C on the coast), the warmest sea of the year (23-25 C), and prices that drop 15-30% from peak summer. Restaurants and attractions remain fully open, and the grape harvest brings a festive energy to wine regions across the country.
Whether you want to swim off the beaches of Hvar, explore Dubrovnik's medieval streets without the crowds, taste new vintages on the Korcula wine trail, or hike through Plitvice Lakes in early-autumn colours, September delivers the best of Croatia with fewer compromises.
Weather in Croatia in September
22-28 C
Air Temperature
Coastal average
23-25 C
Sea Temperature
Warmest early Sept
8-10 hrs/day
Sunshine
Mostly sunny
4-7 rainy days
Rainfall
Brief showers possible
September weather in Croatia is characterised by warm, mostly sunny days with gradually shortening daylight. The Adriatic coast enjoys temperatures of 22-28 C, with the first half of the month feeling like an extension of summer. By late September, temperatures ease to around 20-24 C, and evenings become noticeably cooler (16-18 C).
Inland Croatia, including Zagreb, is slightly cooler with temperatures of 18-25 C. The Plitvice Lakes region can dip to 15-22 C, making it comfortable for hiking. A light layer is useful for evenings and highland areas.
The standout feature is the sea temperature — the Adriatic reaches 23-25 C in September, which is warmer than June. The southern coast and islands like Hvar and Korcula stay warmest. Brief thunderstorms become more likely towards the end of the month, but they pass quickly.
Is September a Good Time to Visit Croatia?
Yes — September is arguably the best month to visit Croatia. It combines the warm weather and sea temperatures of summer with the reduced crowds and lower prices of the shoulder season. For beach holidays, sightseeing, wine tourism, and island hopping, it offers the most complete experience of any month.
Why September Is Great
- Warmest sea temperatures of the year (23-25 C)
- Crowds thin significantly from mid-September
- Accommodation 15-30% cheaper than July-August
- Grape harvest season — wine tastings and festivals
- Beautiful golden light for photography and sunsets
What to Consider
- Early September can still feel busy in Dubrovnik and Hvar
- Thunderstorms possible, especially late in the month
- Ferry schedules reduce from mid-September
- Some beach bars and clubs close after mid-month
- Daylight hours shorter than summer (12-13 hours)
Best Places to Visit in Croatia in September
Dubrovnik
September is one of the best months for Dubrovnik. The stifling summer heat eases, cruise ship numbers decrease after mid-month, and the sea is at its warmest for swimming off Banje Beach and Lokrum Island. The city walls are far more enjoyable to walk without the July-August heat. Evening dining on the harbour is warm and atmospheric.
Split
Split in September offers warm days for exploring Diocletian's Palace without the intense summer crowds. The Riva promenade buzzes with a more local feel, Marjan Hill hikes are comfortable, and it remains the perfect ferry hub for island hopping to Hvar, Brac, and Vis.
Hvar
Hvar in September retains its glamorous energy while shedding the peak-season crowds. Beach clubs and restaurants are still in full swing, the lavender has been harvested, and the warm sea makes for perfect swimming. It is also a prime time for wine tasting as the grape harvest begins on the island.
Zagreb
Croatia's capital is lively in September as locals return from summer holidays and the cultural season kicks off. The Upper Town is beautiful in the early-autumn light, outdoor cafes along Tkalciceva Street are busy, and the city's museums and galleries are fully open. Temperatures are comfortable for walking (18-25 C).
Plitvice Lakes
September is an excellent month for Plitvice Lakes. The summer crowds have thinned, the surrounding forest begins to show hints of autumn colour, and the weather is mild and pleasant for the extensive walking trails. Water levels are lower than spring but the lakes are beautifully clear. Book tickets in advance.
Rovinj
Rovinj in September is magical — the old town's cobbled streets are quieter, the light is golden, and Istrian restaurants are at their best with early truffle season and the start of olive oil production. The Zlatni Rt nature park is gorgeous for walks, and the sea is warm enough for swimming into October.
Zadar
Zadar's famous sunsets are at their most dramatic in September, with the Sea Organ providing its natural soundtrack. The Old Town is uncrowded, the nearby Kornati Islands are perfect for a day trip, and the warm evenings make the waterfront promenade irresistible.
Korcula
September is harvest time on Korcula, with the grape and olive harvests in full swing. The medieval old town is quieter than summer, beaches are warm and uncrowded, and local restaurants serve the freshest seasonal produce. It is also the time for traditional Moreska sword dance performances.
Best Things to Do in Croatia in September
Beach & Sea Swimming
September is arguably the best month for swimming in Croatia. The Adriatic is at its warmest (23-25 C), and beaches are noticeably less crowded than in summer. The best spots include Zlatni Rat on Brac, the Pakleni Islands near Hvar, the coves of Korcula, and Banje Beach in Dubrovnik.
Wine Harvest & Tastings
September is grape harvest season across Croatia. The Peljesac Peninsula's Dingac and Postup vineyards are buzzing with activity, Istria's Malvazija grapes are being picked, and Korcula's Posip and Grk harvests are underway. Many wineries offer special harvest tastings and tours.
Island Hopping
Ferries still run frequently in September, and the islands are far more relaxed than in August. A classic route from Split hits Hvar, Vis, and Korcula. From Dubrovnik, the Elaphiti Islands make a perfect day trip. The warm sea means every island stop includes great swimming.
National Parks & Hiking
Mild temperatures make September ideal for outdoor activities. Plitvice Lakes and Krka are less crowded and pleasantly warm. Paklenica is excellent for hiking without summer heat. Mljet National Park's saltwater lakes are still warm enough for swimming.
City Sightseeing
With temperatures around 22-28 C and gentler light, September is perfect for exploring Dubrovnik's city walls, Split's Diocletian Palace, Zadar's Roman Forum, and Zagreb's Upper Town. Golden-hour photography is stunning, and the softer crowds make every visit more enjoyable.
Events & Festivals in September
Dubrovnik Good Food Festival
A culinary celebration showcasing Dubrovnik's best restaurants, local wines, and Dalmatian gastronomy, with tastings and events across the Old Town.
Grape Harvest Festivals
Throughout September, wine regions celebrate the harvest with festivals, open-cellar events, and traditional grape-stomping. The Peljesac Vintage Days are a highlight.
Rovinj Photodays
An international photography festival featuring exhibitions, workshops, and installations throughout Rovinj's atmospheric Old Town streets and galleries.
World Theatre Festival
Zagreb's premier performing arts event brings international theatre, dance, and performance companies to the capital for two weeks of innovative productions.
Ston Wall Marathon
A unique running event along the ancient walls of Ston — the second longest fortification walls in Europe — with stunning views over the salt pans and Adriatic.
What to Pack for Croatia in September
Light summer clothing for daytime — shorts, t-shirts, sundresses. Bring a light jacket or cardigan for cooler evenings, especially late September
Sunscreen (SPF 30+), sunglasses, a hat — the September sun is still strong, particularly around midday
A compact rain jacket or small umbrella — brief showers and thunderstorms become more common towards the end of September
Essential — the sea is at its warmest and you will swim. Bring a beach towel or buy one locally
Comfortable walking shoes for old towns and national park trails, sandals for warm days, water shoes for rocky beaches
Frequently Asked Questions about Croatia in September
September is widely considered one of the best months to visit Croatia. The summer crowds thin out significantly after the first week, yet the weather remains warm (22-28 C on the coast) and the sea is at its warmest — around 24-25 C. Prices drop from peak summer rates, restaurants and attractions are still fully open, and the light takes on a beautiful golden quality. It is the ideal month for combining beach time with sightseeing.
Absolutely. The Adriatic reaches its peak temperature in late August and stays warm throughout September, averaging 24-25 C in early September and around 22-23 C by month's end. This is warmer than the sea in June. The southern coast around Dubrovnik and the islands of Hvar and Korcula tend to stay warmest longest. Swimming is comfortable all month.
Early September (first week or two) still sees summer-level crowds, especially in Dubrovnik and on the islands. However, once European school holidays end around 10-15 September, tourist numbers drop sharply. From mid-September onwards, you can enjoy popular destinations like Dubrovnik's Old Town, Plitvice Lakes, and Hvar without the queues and congestion of July-August.
Pack light summer clothing — shorts, t-shirts, dresses, and swimwear. The weather is still warm during the day, but evenings can be cooler (16-20 C), so bring a light jacket or cardigan. A compact rain jacket is wise as brief thunderstorms become more likely towards the end of the month. Comfortable walking shoes, sunscreen, and sunglasses are essential.
Yes, ferry services run throughout September, though schedules start transitioning from summer to autumn timetables around mid-September. Major routes (Split to Hvar, Split to Brac, Dubrovnik to the Elaphiti Islands) run frequently all month. Smaller islands like Vis and Lastovo may see reduced frequencies later in September. Check Jadrolinija and Krilo schedules a week or two before your trip.