We would recommend booking your tours as soon as possible. They can get fully booked very quickly. Especially in the summer months.
You can in fact cancel at any time, but sadly most tour companies won’t refund you if you cancel less than 24 hours before the start of the tours, unless the tour companies themself cancel because of bad weather, then you’ll be fully refunded. You can see our refund policy HERE which is in line with all of the companies we work with.
You can definitely go snorkeling, but you need to have a license to dive to be able to dive.
Silfra is by far the most popular snorkeling location.
Around 4 degrees all year round.