Sailing in San Blas: Find Out Why Seasickness is Rare Embarking on an adventure to the San Blas Islands is a dream for many travelers seeking pristine beaches and untouched natural beauty. However, for some, the concern of seasickness can overshadow the excitement of the journey. But there’s no need to worry. Seasickness in the San Blas Islands is uncommon. The archipelago lies outside the open sea, meaning minimal swell and little to no rolling while sailing or at anchor .