The 30-track double-disc collection, titled Up To Now, will include their previous singles, rare material, cover versions and three new songs.
"It's a portrait of us as a band, warts and all," Gary Lightbody said.
"We've climbed a hill and now we're looking back and taking in the view for a bit. It's nice to show people that we didn't just arrive overnight."
New song 'Just Say Yes' will be released as a single on November 2.
Snow Patrol formed in Scoland in 1994 and have shifted over ten million copies of their last three albums.