WineOS by Graševina Croatica is one of the wine festivals that anchors the Slavonia & Croatian Danube calendar, drawing both local visitors and international wine travellers each year. It is held at Economic Center of Osijek-Baranja County in Osijek, in the heart of one of Croatia's most distinctive wine areas. The 2026 event marks the 11th edition of the festival, reflecting its consistent place in the regional calendar.
Largest wine event in eastern Croatia. 2,800+ sqm exhibition space, 125 exhibitors, hundreds of wines. Wine festivals across Europe typically combine producer tastings with food pairings, live music, and a strong sense of place. Visitors can expect access to wines from a range of producers in the appellation, alongside food stalls offering regional specialities, masterclasses or vineyard walks for those who want to learn more, and an opportunity to buy directly from producers at cellar prices. Many events run across multiple days or weekends, allowing visitors to sample different parts of the programme according to interest, and combine well with the area's wider tourism offer. The event is organised by Dekanter Association with Graševina Croatica Association, City of Osijek and Osijek-Baranja County, which sets the tone and direction of the programme each year.
Slavonia and the Croatian Danube in eastern Croatia form the country's largest wine region by area, producing the bulk of Croatian wine. The region is dominated by Graševina (Welschriesling), Croatia's most-planted grape, which produces a wide range of styles from crisp dry whites to late-harvest sweet wines. The Kutjevo zone in central Slavonia is the historic quality reference, with Kutjevački Podrum (founded 1232 by Cistercian monks) being one of Europe's oldest continuously operating wineries. The region also produces Traminac (Gewürztraminer), Pinot Sivi (Pinot Gris) and increasingly serious red wines from Frankovka (Blaufränkisch) and international varieties.
The 2026 edition is scheduled for 16-17 January 2026. Cost details are best confirmed directly with the organiser ahead of travel. Full programme, ticketing and updated information are published on the official site at wineos.biz. Visitors are advised to check directly with the organiser for the latest schedule, as festival programmes are sometimes updated close to the event date.
Slavonia is reached via Osijek airport with regional flights, or by car from Zagreb (3 hours) or Budapest (3 hours). The vineyard area centres on Kutjevo, with Đakovo (the historic cathedral town and Lipizzaner stud), Vukovar and Osijek as the main bases. The region pairs wine tourism with the Kopački Rit nature park (one of Europe's largest wetlands) and the Slavonian baroque architecture. Cuisine pairs the wines with kulen (the spicy paprika sausage that is the regional specialty), čobanac (the Slavonian shepherd's stew), freshwater fish from the Sava and Drava rivers, and the area's strong farmhouse cheese traditions.
