Sea Turtle Nesting Season on Siesta Key: What to Know Before Your Stay

Key takeaways

• Sea turtle nesting season on Siesta Key runs May 1 through October 31, with the first 2026 nest already spotted nearby in late April.
• You'll likely see marked nests on the beach (four wooden stakes with pink tape) that should be left undisturbed.
• Three species nest here: the loggerhead (most common), the green sea turtle, and the rare Kemp's ridley.
• Bright light and noise at night can disorient nesting mothers and hatchlings, so the whole island shifts to amber outdoor lighting during the season.
• Small habits like filling sand holes, taking trash with you, and switching off phone flashlights at night make a real difference for hatchling survival.

From May through October, Siesta Key's white quartz beaches turn into one of Florida's busiest sea turtle nesting grounds. Most of the activity happens after dark, so visitors rarely witness it directly, but the signs are everywhere: roped-off nests, dimmer outdoor lights, and a quieter pace along the shore after sundown. Here's what to expect and a few small things that help.

When exactly is turtle season, and why does the timing matter?

Nesting season officially runs May 1 through October 31, although Mote Marine Laboratory volunteers start scanning the beaches on April 15 since turtles don't always read the calendar. The first 2026 loggerhead nest was found in Venice, just south of Siesta Key, on April 27.

Why such a long window? Female turtles return to nest several times each summer, and eggs need 50 to 55 days to incubate before hatchlings emerge. Nests laid in May start hatching in July; nests laid in late summer can hatch as late as October. Any stay between now and Halloween falls inside turtle season.

Which turtles actually come ashore here?

Three species nest on Siesta Key. The loggerhead, named for its oversized, blocky head, is by far the most common, and Sarasota County has the highest density of loggerhead nests on the entire west coast of Florida. The green sea turtle shows up less often (its name comes from a greenish layer of body fat, not the shell color). Rarest of all is the Kemp's ridley, one of the most endangered sea turtle species in the world; even local researchers count themselves lucky when one nests here.

All three are protected under federal and state law, which is why nests get roped off and stay strictly off-limits, even for close-up photos.

What does a marked nest look like, and what should I do if I find one?

Mote volunteers patrol the beach each morning. When they spot evidence of a nest, usually a distinctive set of flipper tracks leading up from the water, they mark it with four wooden stakes and pink flagging tape, often with a small sign attached.

A few simple rules if you come across one:

• Keep a few feet of distance and don't touch or lean on the stakes.
• Photos from outside the markers are fine; just no flash at night.
• If you see a hatchling heading away from the water or a turtle in distress, call Mote's 24-hour line at 941-988-0212 instead of picking it up.

Disturbing a nest is a federal offense, so the rules are firm. The staking system makes nests easy to spot and walk around.

Why is the beach so dark at night during nesting season?

Sea turtles navigate using moonlight reflecting off the water. Adult females rely on it to find their way back to the Gulf after laying eggs, and hatchlings rely on it to head in the right direction the moment they emerge from the sand. Artificial white light from phones, flashlights, beachfront windows, or fishing lanterns pulls them inland instead, where they dehydrate or get hit by traffic.

That's why the whole island quietly switches to amber-toned outdoor lighting from May through October (amber wavelengths don't interfere with turtle navigation). Walking the beach after sunset works best with the phone in your pocket and your eyes adjusted to the moonlight. A few other small habits help, too: fill in any holes dug during the day (mother turtles can get stuck in them), knock down sandcastles before leaving, and take all trash and fishing line with you.