Celebrate World Lake Day during World Water Week - Join us for a morning swim!

As part of World Water Week 2026, join Stockholm International Water Institute (SIWI), the City of Stockholm, Swimmable Cities and partners to celebrate World Lake Day with a morning swim at Marieviksbadet. 

World Lake Day is a United Nations observance that recognizes the vital role lakes play in supporting people, ecosystems, economies and climate resilience. 

Held on the final day of World Water Week, the event brings together international water leaders, Stockholmers and visitors to celebrate healthy lakes, connect global water discussions with everyday life, and experience Stockholm's unique relationship with water. Swedish Olympic swimming medallist Therese Alshammar will join participants for the morning swim and celebration. 

The ability to swim in Lake Mälaren is something many people take for granted. World Lake Day is an opportunity to celebrate what healthy lakes make possible while highlighting the importance of protecting freshwater ecosystems for future generations. 

The event is open to both World Water Week participants and members of the public. Whether you choose to swim, take a quick dip or simply enjoy the morning by the water, everyone is welcome. 

Thursday, 27 August 2026 

06:45 Arrival  

07:00 Welcome and morning swim 

Location 

Marieviksbadet, a public bathing area on Lake Mälaren, approximately a 10-minute walk from Liljeholmen metro station (Red Line) and around 15 minutes by metro from Stockholm Central Station. 

Do I have to swim? 

No. Whether you choose to swim, take a quick dip or simply enjoy the morning by the water, everyone is welcome. 

Important information
Participation is at your own risk and responsibility. Participants are expected to follow local swimming guidelines and any instructions provided by event organizers. 

More info

siwi@siwi.org