Iceland — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of Iceland. Learn about today’s conditions, monthly averages, and how the surrounding seas and oceans vary by season. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
Coastal Seas and Oceans
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
Iceland’s coastal waters are famously cold but moderated by the North Atlantic and the Gulf Stream, so temperatures vary by region and season. During summer (June–August) sea-surface temperatures near populated coasts typically range from about 7–12 °C (45–54 °F) in the southwest and south to roughly 4–8 °C (39–46 °F) in northern and eastern fjords. In spring and autumn the water commonly falls into the 3–8 °C (37–46 °F) band, while winter sea temperatures along many shores average around 0–4 °C (32–39 °F), with slightly warmer pockets near the warm currents and colder patches in exposed northern waters. Open-ocean and fjord conditions can change quickly with tides, winds and localized upwelling, so observed temperatures at any specific beach will vary.
Swimming Conditions
Swimming in Icelandic seawater is legally allowed but not widespread as a casual activity because of the cold, strong currents and unpredictable weather; these factors increase the risk of cold-water shock and hypothermia. Many people who want to experience bathing opt for heated municipal pools or natural geothermal pools and hot springs, which are plentiful, safe and lifeguarded in towns. Cold-water and winter swimmers do take to the sea or tidal pools using wetsuits, dry suits or brief supervised dips, and adventurous activities like sea kayaking and surfing are practiced with appropriate gear and local guidance. If you plan to enter the ocean, check local advice, use thermal protection, and never swim alone in unsupervised or exposed locations.