Promoters behind the events have announced the upcoming KISS Kruise, Slipknot's Knotfest at Sea, and Kesha's Weird and Wonderful Rainbow Ride will no longer set sail as planned this year 2020.
The Melissa Etheridge Cruise and Coheed and Cambria's S.S. Neverender fan gatherings have also been postponed until 2021.
"Going above and beyond to create moments and memories that last a lifetime is why we do what we do," Sixthman CEO Anthony Diaz said in a statement.
"We see something incredibly special happen when communities come together to celebrate shared passions. Serving them on vacation is what has driven us for the past 20 years and 145 immersive events on land, sand and sea."
"We recognise we're in the midst of uncertain times right now - times that call for extra flexibility, special value and an absolute assurance that the health and safety of our guests is being closely looked after."