What to Wear Hiking in Iceland: The Layering System

Why layering matters in Iceland

Iceland's weather is famously changeable. You can start a hike in sunshine, climb into fog and drizzle, and reach a windy pass where it feels near freezing, all before lunch. A single heavy jacket leaves you either sweating on the climbs or cold on the breaks. Layering lets you regulate temperature precisely. You stay dry from sweat while moving and warm when you stop. Damp clothing combined with wind is how hikers get dangerously cold, even in summer, so the goal is always to stay dry from both inside and outside.

Base layer: manage moisture

Your base layer sits against the skin and moves sweat away from your body. Merino wool and synthetic fabrics both work well; merino resists odour on multi-day hikes, while synthetics dry faster. Avoid cotton entirely, including cotton T-shirts and jeans, because it holds water and loses all insulation when wet. In summer, a lightweight long-sleeve top is usually enough. Add thermal leggings for highland routes, early mornings and any time the forecast looks cold.

Mid layer: insulation

The mid layer traps warmth. A fleece or light synthetic insulated jacket is ideal while moving, because it stays warm when slightly damp and breathes well. Many hikers also carry a warmer puffy jacket for breaks, summits and evenings at huts. Down is light and packable but loses warmth if it gets wet, so keep it in a dry bag or choose synthetic insulation if you expect sustained rain. On a typical summer day hike, one fleece plus one packable insulated jacket covers most situations.

Outer layer: wind and rain protection

A genuinely waterproof, breathable jacket with a hood is non-negotiable. Look for taped seams, a hood that adjusts tightly so it does not blow off, and pit zips or vents for climbing. Waterproof over-trousers are just as important; wind-driven rain soaks normal hiking pants quickly. In Iceland, the shell is worn more for wind than for rain on many days. A jacket that cuts wind well will make a bigger difference than an extra fleece.

Footwear and socks

Most trails involve uneven lava, loose scree, mud or snow patches, so sturdy waterproof hiking boots with ankle support are the safest choice for anything beyond a short paved walk. Make sure they are broken in before your trip. Wear merino or synthetic hiking socks and carry a spare pair in a dry bag. For routes with river crossings, such as the Laugavegur, pack lightweight water shoes or sandals with a heel strap so your boots stay dry.

Accessories that make a difference

Small items are what keep you comfortable when the wind picks up. They weigh little and pack small, so there is no reason to leave them behind on any hike. Cold hands and ears are often what forces people to cut a walk short, and wind chill on exposed ridges can make a mild day feel wintry within minutes. Keep these in an outer pocket for quick access.

• Warm hat or beanie, even in July.
• Buff or neck gaiter for wind and sun.
• Light liner gloves plus waterproof or windproof outer gloves.
• Sunglasses and sunscreen; snow and long summer days mean strong UV.
• Gaiters for snow, scree and wet grass.
• A cap or brimmed hat to keep rain off your face under the hood.

Adapting for the seasons

In summer, the system above works for almost every hike. Leave the heaviest items at home on short lowland walks, but always carry the shell, a warm layer, hat and gloves. In the highlands, assume it can snow at any time of year. In spring, autumn and winter, upgrade to a thicker base layer, a warmer insulated jacket, insulated waterproof boots and heavier gloves, and add microspikes. In every season, keep a full change of dry base layers in your pack on longer hikes.