Best snorkeling in the cold & wild

Three destinations where the water is cold and the exposure protection is the point. This is the catalog's temperate and cold-water region rather than a reef one: Silfra is a glacial-meltwater fissure in Iceland, the Azores are volcanic mid-Atlantic islands on the Gulf Stream, and Scotland is kelp forest, sea loch and tidal sound on the west coast and islands. None of the three is a coral reef, and this page does not pretend otherwise — what they share is clarity, hard structure and water that stays cold, which is why a wetsuit is the norm and a drysuit is the norm in Scotland. Each carries its own honest caveat: Silfra is snorkelled as part of a certified guided group in near-freezing water, the Azores are cool enough that exposure protection is a constant and their seamount trips are weather-dependent open-ocean days, and Scotland's west coast runs hard tides with basking sharks in summer under strict wildlife-watching rules. Read the three together as the trips you take because you want the water, not because the water is warm.

Cold & wild is not a reef region and never was — what its 3 members share is temperature, clarity and exposure protection rather than coral. The type mix says it plainly: 4 managed marine reserves and 2 shore reefs, plus 2 megafauna points across 11 key sites in 3 destinations, and not a single site typed as an open-water reef. Two of the three are cold-water snorkels that require a drysuit or a serious wetsuit — Silfra in near-freezing glacial meltwater and Scotland's kelp forests — while the Azores sit in temperate mid-Atlantic water where a wetsuit is simply part of the kit. Where the warm regions measure a trip in boat days and reef tables, this one measures it in tides, thermals and visibility, and the honest planning question here is not which month but whether you and your gear are ready for the temperature.