At the age of eight years he built his first drum set and soon played music with a friend, Esbjörn Svensson.

Since 1989, he was back with Svensson, initially in the group Stock Street B , then again in a trio with the bassist Dan Berglund with an album released in 1993. e.s.t.

[1] Öström also has worked with Bobo Stenson, Lennart Åberg, Palle Danielsson, Nils Landgren, Stina Nordenstam, Peter Gullin and Steve Dobrogosz as well as numerous American musicians such as Michele Hendricks, Benny Golson, Mulgrew Miller, Stefon Harris, Pat Metheny or Alan Pasqua.

In 2010, he founded his own quartet with guitarist Andreas Hourdakis, keyboardists Gustav Karlöff and Daniel Karlsson and bassist Thobias Gabrielson, releasing their first album Thread of Life, that in 2012 received an Echo Jazz.

He also participates on several albums by Nils Landgren, Lars Danielsson, Viktoria Tolstoy, Jeanette Lindström and Nicolai Dunger.