SS Guararema was a Brazilian Cargo ship that collided with SS Britannia on the Santos bar off Ilha Des Palmas, Brazil while departing Santos in ballast.

Guararema was constructed at the Ardrossan Dockyard & Shipbuilding Co. Ltd. shipyard in Ardrossan, United Kingdom. She was completed in 1919 and was named War Avon initially. She served different countries and companies under different names; until 1939 when she was sold to Brazilian transport company Empreza Internacional De Transportes, who operated her as Guararema.

The ship was 47.2 metres (154 ft 10 in) long, with a beam of 8 metres (26 ft 3 in) and a depth of 3.3 metres (10 ft 10 in). The ship was assessed at 548 GRT. She had a 1 × 2 cyl compound engines driving a single screw propeller. The engine was rated at 91 nhp.

On 4 March 1949, Guararema was en route from Santos when she collided with SS Britannia and sank on the Santos bar off Ilha Des Palmas, Brazil. There were no casualties.^[1]