2025 Florida Bioluminescence Calendar

The date highlighted in dark green is the actual date of the New Moon. The dates highlighted in a slightly lighter green color indicate dates that are best for viewing bioluminescence in that calendar month.

When is the best time to see bioluminescence in Florida?

Florida offers bioluminescence nearly year-round, thanks to two different glowing organisms. From May through October, the stars of the show are dinoflagellates—tiny plankton that emit a neon-blue light when disturbed by movement. This is the most dramatic and interactive type of glow, where each paddle stroke and fish swirl ignites bursts of light.

From November through May, the glow comes from comb jellies—gelatinous creatures that light up when touched. While the glow is more subtle and sparkly than the flash of dinoflagellates, it’s still magical, especially on cool, clear nights. So no matter when you visit, there’s something glowing in Florida’s waters!

Does the moon phase affect bioluminescence visibility?

Yes—moon phases make a noticeable difference! The darker the sky, the brighter the bioluminescence will appear. On new moon nights (when there’s no moon), the water looks like it’s sparkling with stars. These are often the most awe-inspiring nights to paddle.

During full moons, the ambient moonlight can reduce contrast, making the glow appear less intense. But don’t worry—bioluminescence is still visible, and our guides know exactly how to make the most of every phase.

Can I still see bioluminescence during a full moon?

You can! While full moonlight can slightly wash out the glowing effect, bioluminescence doesn’t disappear—it just takes a little more finesse to view it clearly. Our experienced guides time departures and choose routes that help you see the glow even under a bright sky.

We often head into shaded areas like mangrove tunnels or wait for the moon to rise higher to improve visibility. You’ll still get to witness the magic, even if it’s a little more subtle.

What makes darker nights better for viewing bioluminescence?

Darker nights offer higher contrast, which means the glow from the water stands out much more vividly against the black surface. With no city lights or moonlight to compete with the natural luminescence, the water appears to shimmer and burst with light from every splash and movement.

It’s not just about seeing more glow—it’s about the atmosphere. On a moonless night, the experience feels more immersive and mysterious, almost like paddling through a dream.