Hiking Safety in Iceland in Summer

Most people who get into trouble hiking in Iceland are not doing anything reckless. They are on a marked trail, in summer, on a route that thousands of people walk every year. The trails themselves are rarely technical. What makes them serious is the combination of three things: the weather changes faster than anywhere most visitors have hiked before, there is no tree cover and almost no shelter, and once you are in the interior you are a long way from help.

This guide is about that specific gap — between how an Icelandic summer hike sounds and what it actually asks of you. It covers what goes wrong, how to read the conditions before you start, and when to turn around. It is deliberately plain. For the drive to the trailhead, read wind and storm driving in Iceland — this page is about walking.

Exposure at temperatures that do not sound cold

This is the hazard that does the most damage, because it does not announce itself. An Icelandic summer day is often around 10°C. That number sounds mild, and people dress for it as though it were mild. But hypothermia does not need freezing conditions — it needs you to be wet, exposed to wind, and unable to warm back up. Iceland supplies all three routinely, and the Icelandic Met Office describes the highland interior as substantially colder than the coast where you started your drive.

Look again at the live readings at the top of this page. The gap between the air temperature and the feels-like figure is the wind doing its work, and on an exposed ridge that gap is routinely large enough to turn a pleasant number into a serious one. Add rain, and wet clothing loses most of its insulating value — cotton especially, which is why the wardens singled it out. This is the entire mechanism: mild-sounding air, wind, water, no shelter, and hours to walk.

The defence is unglamorous and it is the same one SafeTravel gives: windproof and waterproof outer layers, a hat and gloves, no cotton against the skin, and food. Carry them even when the trailhead is sunny — the whole point is that the trailhead is not where you will need them.

The ground itself: geothermal areas and loose terrain

Several of Iceland's most-walked trails run through active geothermal ground — Reykjadalur above Hveragerði, the Hveradalir area in Kerlingarfjöll, and stretches of the Laugavegur. The water in these features is not warm, it is near boiling, and the crust around them can be thin enough to break under a boot. The marked path exists because someone worked out where the ground holds. Stay on it, and keep children and dogs close.

The other terrain hazard is more mundane: much of Iceland is loose volcanic scree and young lava, which moves under you and is hard on ankles. Add wet moss over rock, and a rolled ankle five hours from the trailhead becomes a rescue rather than an inconvenience. Boots with ankle support and a genuine sole are not fussiness here, and trainers on the marked-but-rough trails are how a lot of otherwise fine days end.

The checks to run before you walk

None of this takes long, and it is the difference between the hikers who have a good day and the ones the rescue teams go looking for. Run these before every walk, not just the big ones.

Getting to the trailheads

Almost every trail on this page starts at the end of a drive, and the interior ones — Landmannalaugar, Kerlingarfjöll, Þórsmörk — are reached only by F-roads, which are 4WD-only by law and open for a short summer window. A mid-size 4x4 covers the easier highland roads; the routes with unbridged river crossings need something rated to ford, like a Land Cruiser. See do you need 4WD in Iceland for the full answer.