The second mural, on Prince Street, by the harbour, shows a traditional coble boat struggling in huge waves, as well as a puffin, gannets and a lobster.
The Great Gale of 1871, which struck Bridlington Bay, claimed the lives of 70 sailors, including a lifeboat crew.
Porter said he was inspired to paint the specific style of boat after asking local people what they would like to see.
Angela Merrills, from East Riding of Yorkshire Council, said: “We carried out some public engagement and asked residents to tell us what they’d like to see.
“As a result of that, Sam has created these amazing murals. He’s absolutely exceeded our expectations. He’s become a bit of a local celebrity.”
The artworks are part of a wider £125,000 regeneration project led by the council, with funding from the government’s UK Shared Prosperity Fund.
The project also includes a new footpath in Westgate Park and benches on Harbour Road.
New lighting and CCTV cameras are also due to be installed in the coming months.