Join me as I explore the vibrant underwater world of Battery Rocks in Penzance at low tide. It was my first time snorkelling here during low tide, and I was genuinely blown away by the burst of colour revealed as the sea retreated and sunlight streamed through the shallows.

At this tide level, the underwater landscape changes completely. The rocky gullies and pools that are usually hidden become accessible, revealing a kaleidoscope of marine life and seaweeds in full detail. The rocks are carpeted with golden-brown kelp, while clusters of anemones and barnacles add splashes of red and orange against the stone.

Low tide also makes it easier to spot some of the resident fish that call this stretch of coastline home. Keep an eye out for the impressive Ballan Wrasse, often the king of the reef here, gliding confidently between the rocks. These beautifully patterned fish are surprisingly curious and can grow to a substantial size, making them a highlight for anyone exploring with a snorkel.

In the shallower pools, you might see blennies and gobies darting for cover, while crabs and small shrimp scuttle beneath ledges. If you are extremely lucky you might even see a very rare ‘rainbow slug’. Every corner seems to reveal something new, and the mix of colours, textures, and movement under the water gives Battery Rocks an almost tropical feel on a bright Cornish day.

Snorkelling here at low tide offers a completely different perspective on one of Penzance’s most loved wild swimming spots, a reminder that even familiar places can surprise you when you see them from a new angle.