Bioluminescence Washington 2025 Calendar. We've also included the best times to find glowing comb jellies! Save 10% when reserving a group of 4 or more guests.

To maximize the best sightings, we offer bioluminescence tours during the darkest nights of summer. While there’s never a guarantee that you’ll be able to witness this fantastical sight, the summer months of june through august are the most likely times to see.