Siniff Bay
| Siniff Bay | |
|---|---|
| Location | Marie Byrd Land, Antarctica |
| Coordinates | 74°40′S 135°50′W / 74.667°S 135.833°W |
| Ocean/sea sources | Pacific Ocean |
Siniff Bay (74°40′S 135°50′W / 74.667°S 135.833°W) is a bay 13 nautical miles (24 km; 15 mi) wide between Verleger Point and Melville Point, along the coast of Marie Byrd Land, Antarctica.