SS Penguin was a New Zealand inter-island ferry steamer that sank off the southwest coast of Wellington after striking a rock near Sinclair Head in poor weather on 12 February 1909.

At 10 pm, Captain Francis Naylor headed farther out to sea to wait for a break in the weather, but the ship smashed into Thoms Rock while making the turn, and water started to pour in.

[4] Following the disaster, a half-day holiday was declared in Wellington to allow the many funerals to be held,[5] as some 40 people were laid to rest in Karori Cemetery.

A court of inquiry found that the ship struck Thoms Rock near the mouth to Karori Stream in Cook Strait.

[6] On the 100th anniversary of the sinking, Wellington's mayor unveiled a plaque at Tongue Point, near the site of the wreck.