Penzance Harbour has served as Cornwall's maritime gateway since the thirteenth century, when tin exports and pilchard fishing anchored the town's economy.
The sheltered inlet, flanked by St Michael's Mount to the east and the Lizard Peninsula to the south, offers direct access to Mount's Bay's kelp forests and the granite reefs where Atlantic grey seals haul out between April and November. Marine Discovery operates from the harbour's eastern jetty, running two-hour wildlife excursions aboard purpose-built rigid inflatable boats that reach seal colonies at Penlee Point and seabird cliffs near Lamorna Cove.
The company's RIB fleet carries twelve passengers per departure, with waterproof suits and life jackets supplied for all conditions. Skippers navigate beyond the breakwater into open Atlantic waters where basking sharks migrate through late summer months and porpoises surface in pods of six to eight. The boat hire Penzance operation also accesses sea caves beneath the Land's End promontory, where guillemots and razorbills nest on vertical granite ledges from March through August. Cornwall's southwesternmost coastline remains one of Europe's most biodiverse temperate marine zones, protected under Marine Conservation Zone designations that restrict commercial trawling within three nautical miles of shore.
Trips depart hourly from 09:00, though tide tables dictate the precise schedule—spring tides expose sandbanks that trap juvenile bass and grey mullet, drawing seals into shallow feeding grounds. The harbour's Victorian pier houses departure points for multiple operators running seal safaris, coastal tours and fishing charters, but Marine Discovery's wildlife-focused itinerary prioritizes observation over speed. Boat hire Penzance tours circle the Gear Rock seal colony, where sixty to eighty individuals bask during low tide, and transit west past Mousehole's granite harbour walls toward the Runnel Stone reef system. October marks the grey seal pupping season, when females retreat to sheltered coves and newborn pups remain ashore for three weeks before entering the water.
1 hr
