Sætre is situated on the western bank of the Inner Oslofjord, approximately 45 kilometers south of Oslo.

[2] The village is located on a peninsula known as Hurumlandet, situated between the Oslofjord to the east and the Drammensfjord to the west.

The river has a watershed of approximately 20 square kilometers and releases 11 million cubic meters of water in the fjord every year.

The river is incredibly susceptible to human influence and is negatively affected by things such as littering.

Sætre was the site of Norsk Sprængsofindustri, a manufacturing plant owned and operated by Dyno Nobel which produced explosives for civil and military usage.