SSW may refer to:South-southwest, a compass direction SSW, the callsign of a TV station in the South West and Great Southern regions of Western Australia Seminary of the Southwest, an Episcopal seminary in Austin, Texas, USA St. Louis Southwestern Railway, reporting mark SSW South Schleswig Voter Federation, German: Südschleswigscher Wählerverband Schichau Seebeckwerft, a German shipbuilding corporation Siemens-Schuckertwerke, a German electrical engineering company Special Service Wing, a special forces unit of the Pakistan Air Force Sudden stratospheric warming, a meteorological phenomenon in the upper troposphere Sutton SignWriting Southern States Wrestling, a professional wrestling promotion Swati language ISO 639 code Samsung White, former League of Legends team Seam-shifted wake, an aerodynamic phenomenon involving baseballs