Greenland — Sea Water Temperature and Annual Ranges

Sea Water Temperature Along the Coast

Places with the Warmest Sea Water Today

The Most Popular Seaside Places

Coastal Seas and Oceans

Water Temperature and Swimming Overview

Water Temperature Trends

Greenland’s coastal waters are cold year-round, with strong regional and seasonal variation. In summer the warmest coastal spots, typically in the sheltered southern fjords and bays, can reach roughly 3–10 °C (37–50 °F), while most western and northern shores remain closer to 0–6 °C (32–43 °F). Spring and autumn are transitional, with surface temperatures generally about 0–6 °C (32–43 °F). In winter sea temperatures commonly hover near the freezing point of seawater, often between about −1 and 2 °C (30–36 °F) where the sea is open, and many coastal areas are ice‑covered or edged by ice floes. Local conditions around glaciers, icebergs and freshwater runoff can produce sharp, localized cooling even in summer.

Swimming Conditions

Swimming in Greenlandic coastal waters is physically possible but strongly constrained by the cold. There are no widespread legal prohibitions, but open-water swimming in the sea is rarely comfortable without thermal protection; people who choose to enter the water typically use thick wetsuits or drysuits and follow strict safety practices. Short, supervised cold‑water dips and organized polar plunges occur, and some experienced cold‑water swimmers acclimatize to brief exposures. For most visitors, sea swimming is not recommended because of cold shock, rapid heat loss and the remoteness of rescue services; even in summer, immersion times must be brief and warm clothing and a plan for rapid rewarming are essential.