Autumn is prime for seal encounters around island colonies, with strict wildlife distance and calm, slow finning.

The best odds are off Atlanticfacing coasts in the warmer half of the year.

Expect more plankton in the water column, but also peak activity for many invertebrates.

Summer kelp growth transforms shallow reefs into highrelief underwater forests, excellent for snorkel and scuba on calm days.

Coastal headlands and islands come alive with nesting seabirds.

Many divers target late summer and early autumn for steadier visibility and calmer seas, especially for wreck structure and photography.

When storms roll through, UK divers keep skills sharp in pools and inland sites like Stoney Cove.