Sukhoy Nos is a cape on Severny, the northern island of the archipelago Novaya Zemlya, belonging to the Russian Federation. The site lies near the southern end of the island, very close to the , which separates Severny from Yuzhny, the southern island. It was known for being a site of nuclear testing for the former USSR, being the third detonating site of three on the two islands, as well as being the most northern. It was used between 1958 and 1961 and was the 1961 explosion site of Tsar Bomba.
Coordinates: 73°42′N 54°00′E / 73.700°N 54.000°E