Yes, it is! As long as you do not attempt to step on the ice or swim in the lagoon or in the sea. The icebergs can flip or collapse at any time. The water is extremely cold all year round… cold enough to cause hypothermia in just a few minutes.Those who purchase a kayaking tour receive safety equipment, life vests, and drysuits. They are also accompanied by a professional kayaking guide.The surface of the ground is somewhat rocky and uneven around the lagoon and it can be slippery in winter. Walking and getting around might be a little bit difficult for small children and people with reduced mobility. If the ground is icy, place spikes or crampons on your shoes for safe walking. You can buy crampons at larger gas stations along the way or at sport equipment stores in Reykjavík.