The battle of Frisches Haff or battle of Neuwarp was a naval battle between Sweden and Prussia that took place 10 September 1759 as part of the ongoing Seven Years' War. The battle took place in the Oder Lagoon () between Neuwarp and Usedom, and is named after an ambiguous earlier name for the Lagoon, Frisches Haff, which later exclusively denoted the Vistula Lagoon. Swedish naval forces consisting of 28 vessels and 2,250 men under Captain Lieutenant Carl Rutensparre and Wilhelm von Carpelan destroyed a Prussian force of 13 vessels and 700 men under captain von Köller.