Is your porch light supposed to be off by nine tonight, or is it the kind that's allowed to stay on?

If you own on Sunset Key and haven't asked yourself that question this month, you're behind. Sea turtle nesting season in the Florida Keys runs from April 15 through October 31, which means late August isn't the start of anything and it isn't the end either. It's the middle, the stretch where eggs laid back in June and July are hatching in real time, and where a second wave laid this month won't break the sand until October. For a stretch of beach that belongs to private homes rather than a public park, that timing matters more than it would almost anywhere else in Key West.

Where the season actually stands right now

Sea turtle incubation takes about 60 days, depending on sand temperature. Do the math backward from today and you land on nests that went into the sand in late June, which puts them squarely in hatching range this week. Nests laid in September will still be underground when Halloween decorations go up in Old Town. That overlap is the reason turtle season isn't a single event you brace for and then forget. It's a rolling condition that touches almost every week between now and the end of October, which is exactly why the rules aren't seasonal suggestions. They're the operating instructions for anyone who owns sand.

The rule written for every foot of sand you own

The core requirement, laid out by Save-A-Turtle and tied to Florida code, is specific enough that there's no ambiguity to hide in. All exterior beachfront lighting, and any lighting visible from the beach or waterline, has to be off by 9 p.m. unless it's a turtle-friendly red or amber fixture. That includes landscape lighting, deck lights, and anything mounted near a door or driveway that throws light toward the sand. Interior lights facing the water need curtains or blinds drawn after dark unless the glass itself is turtle-glass rated. Furniture, kayaks, and anything else sitting on the beach needs to be moved up close to the house at night, because an obstructed path can trap a nesting female or a hatchling trying to reach the water.

None of this is abstract. In one documented case on Smathers Beach, a single nest sent roughly fifty hatchlings toward the lights of the Sheraton on South Roosevelt Boulevard instead of the water. Eight of them ended up in the road. Three survived. Five did not. That's what a porch light left on actually costs, and it's why the code doesn't treat exterior lighting as a design choice during these six and a half months.

No city crew is coming to close this beach

Key West's public beaches close to visitors at 11 p.m. by ordinance, which gives places like Smathers and Higgs a built-in enforcement rhythm even when compliance slips. Sunset Key doesn't have that backstop. The beach here is private, which means there's no municipal patrol shutting things down at night and no lifeguard stand doubling as a compliance check. The only regular presence is Save-A-Turtle's own volunteer walk, done most mornings before 8 a.m. by patrollers in bright yellow-green shirts, looking for the tracks and nest signs left overnight. They're checking after the fact. Whatever happened on the sand between sunset and their morning walk already happened. On a private island, the responsibility for what occurs during those hours sits entirely with whoever owns the property behind that stretch of beach, because there's no one else positioned to catch it in the moment.

The guest who's never heard of Save-A-Turtle

Here's the part that generic turtle-season write-ups skip entirely, and it's the part that actually matters if you own here. A meaningful share of Sunset Key's cottages turn over to vacation guests through the season, arriving by the same ferry that brings everyone else across from Old Town. Those guests are on island time. They didn't research turtle-friendly lighting before they booked, and they have no reason to think about it once they've settled onto the veranda with a book and a glass of wine. But the rule is unambiguous on this point: if you rent your home during nesting season, you're required to advise renters of the lighting and beach-clearing rules, and you remain the one accountable if those rules get broken. Hosting guests doesn't transfer the liability. It just adds a layer between the person responsible and the person actually flipping the switch.

That's a real friction for an island built partly on short-term stays, and it's worth treating as a task rather than a footnote.

Here's what that actually looks like in practice this week:

• Confirm your exterior fixtures are either off by 9 p.m. or fitted with red or amber turtle-safe bulbs, not just dimmed.
• Close blinds or curtains on any water-facing windows after dark if the glass isn't turtle-rated.
• Bring loungers, kayaks, and any beach gear up close to the house before nightfall so the sand stays clear.
• If you have guests booked through October, put the lighting rule and beach-furniture rule in writing before they arrive, not as a verbal aside at check-in.
• Store Save-A-Turtle's number somewhere you'd actually find it at 11 p.m., not buried in an email from June.

If a nest shows up in front of your cottage

If you find turtle tracks or an unmarked nest on your stretch of beach, the instruction is simple: leave it alone. No flashlights, no flash photography, no digging to see what's underneath. Save-A-Turtle's patrol will find and mark it on their morning walk, typically wrapped up by 8 a.m., and from there it becomes part of their tracked count for the season. If you're planning any construction or renovation on a beachfront lot, the same patrol needs to check the sand before work starts, since disturbing an unmarked nest during groundwork carries the same liability as leaving a light on. If you come across an injured or obviously disoriented turtle at any hour, the Florida Fish and Wildlife Conservation Commission's hotline, 888-404-FWCC, is the number to call.

None of this changes what an evening on Sunset Key feels like. The verandas are still there, the water still turns that late-day color everyone comes for, and nothing about turning off a spotlight requires giving up the atmosphere the island is known for. It just means that for six and a half months a year, part of taking care of a place like this is remembering that the beach outside your door isn't only yours. Somewhere under that sand, on a schedule nobody can see, something else is counting on you to get the lights right.

If you're weighing what it actually means to hold a piece of this island year-round, from the water side of the property line to the responsibilities that come with it, Bob Cardenas and the Cardenas & Carlson team at Sunset Key Residences can walk you through it with the same attention they'd give their own address.