One of Poland’s most anticipated music events of the year is almost here. The Open’er Festival 2026 returns to the Gdynia-Kosakowo Airfield from July 1 to 4, 2026, bringing together an extraordinary lineup of global superstars and emerging talent. With headliners including legendary rock band The Cure, Grammy-winning DJ Calvin Harris, and K-pop sensation Jennie, this year’s edition is shaping up to be the biggest in the festival’s storied history.
World-Class Lineup
Calvin Harris takes the stage on Thursday, July 2, while The Cure headlines later in the weekend. Other confirmed acts include Teddy Swims, Florence + The Machine, Martin Garrix, and British electronic band The xx. The diversity of the lineup — spanning rock, electronic, hip-hop, and pop — means there is genuinely something for everyone at Open’er 2026. The festival has been recognized as one of Europe’s premier summer music festivals, regularly drawing over 100,000 attendees.
More Than Just Music
Open’er Festival is about much more than the main stages. The grounds feature a dedicated art zone, film screenings, fashion installations, and a sprawling campsite community where festival-goers from across Europe connect and celebrate. The festival’s location on the Baltic coast near Gdynia means attendees can also enjoy beautiful seaside scenery between sets, with the port city’s restaurants, beaches, and nightlife adding to the experience.
Festival Fashion and Custom Apparel
Summer music festivals in Poland are a major driver of custom apparel culture. Open’er 2026 is expected to see thousands of festival-goers sporting custom-designed t-shirts, bucket hats, hoodies, and accessories — both official merchandise and personal creations. Whether you’re part of a friend group coordinating matching outfits, a brand activating at the festival, or just want to commemorate your trip with a custom-printed shirt, Open’er is the perfect occasion for personalized festival wear.
Official Open’er merchandise, including limited-edition tees and hoodies featuring the 2026 lineup artwork, is always among the most popular items. Many attendees also opt for custom-printed gear featuring their favorite artists’ logos or inside jokes from the festival experience. If you’re planning to attend, consider designing a unique shirt or bandana to stand out in the crowd.
Plan Your Trip to Gdynia
Open’er Festival takes place at the Gdynia-Kosakowo Airfield, approximately 20 kilometers north of Gdańsk. The area is well-served by the Tricity (Trójmiasto) metropolitan network, making it easy to reach by train from Warsaw, Kraków, or Berlin. Day tickets and full four-day passes are still available through authorized sellers, though organizers report limited inventory. Accommodation ranges from on-site camping to hotels in nearby Gdynia, Sopot, and Gdańsk.
With its stellar lineup, Baltic Sea location, and vibrant festival community, Open’er Festival 2026 is the highlight of Poland’s summer calendar. Pack your camping gear, grab your most creative custom tees, and get ready for four unforgettable days on Poland’s northern coast.