| San Jorge Gulf | |
|---|---|
 | |
  San Jorge Gulf | |
| Location | Chubut Province Santa Cruz Province Argentina |
| Coordinates | 46°04′52″S 66°50′11″W / 46.08111°S 66.83639°W |
| Type | Ocean basin |
| Max. length | 148 km (92 mi) |
| Max. width | 244 km (152 mi) |
| Average depth | 85 m (279 ft) |
| Residence time | 2 hours |
| Settlements | Comodoro Rivadavia Rada Tilly Caleta Olivia |
The San Jorge Gulf (Golfo San Jorge; Spanish for Gulf of St. George) is a bay in southern Patagonia, Argentina. It is an ocean basin opening to the Atlantic. Its shoreline spans Chubut and Santa Cruz province. The gulf measures approximately 142 miles (229 km) at its mouth and covers approximately 39 square kilometres (15 sq mi). It is located between Cape Dos Bahías and Cape Tres Puntas.
Due to its geography, more than 70% of the gulf's basin is between 70 metres (230 ft) and 100 metres (328 ft) deep. To the south it is about 50 metres (164 ft) 60 metres (197 ft) deep and in the north 90 metres (295 ft). The seabed was formed by bivalves and cirripedial remains, and it consists of mud, sand, gravel, and sand with carbonate.
The mean water temperature varies between 5.09 °C (41 °F) and 13.41 °C (56 °F); salinity is around 33000 ppm.