Memory of Water (Finnish: Veden vartija) is a 2022 Finnish sci-fi drama film directed by Saara Saarela. Based on the novel Memory of Water by Emmi Itäranta, the film takes place in the dystopian future in the Scandinavian Union led by a military government, where there is a shortage of fresh water as a result of an environmental disaster. The film is starring by Saga Sarkola, Mimosa Willamo, Lauri Tilkanen, Pekka Strang and Minna Haapkylä.

The film was shot in 2020 in Estonia, Germany and Norway. The actual production process of the film already started in the fall of 2015, and it was supposed to be in theaters in March 2022, but the corona restrictions moved the premiere to the fall of the same year. The film's budget was €3.4 million.

The film was premiered in Finland on 2 September 2022. It received a mixed reception from critics, partly praising its sharp world-building, while partly criticizing the clichéd plot.