If you're building on or near a beach anywhere along the US Atlantic or Gulf coast, sea turtle nesting season will affect your project. From May through October, five species of federally protected sea turtles nest on US beaches, and construction activities near nesting habitat are heavily regulated.
Lighting restrictions alone have redesigned entire building facades. Beach nourishment projects are routinely delayed by months. Even inland projects near the coast face restrictions if exterior lighting could disorient hatchlings.
This guide covers the species, the regulations, the seasonal timing, and the practical steps to keep your coastal project compliant and on schedule.
The Species
Five sea turtle species nest on US beaches. All are protected under the Endangered Species Act:
Loggerhead (Caretta caretta) - Listed Threatened. The most common nesting species on US Atlantic and Gulf beaches. Nests from late April through September, primarily in Florida, Georgia, South Carolina, and North Carolina. Over 100,000 nests per year in Florida alone.
Green turtle (Chelonia mydas) - Listed Threatened (Florida and Mexico breeding populations) / Endangered (all others). Nests primarily in Florida, with increasing numbers in other southeastern states. Nesting season May through September.
Leatherback (Dermochelys coriacea) - Listed Endangered. The largest sea turtle species. Nests from March through July, primarily in Florida, US Virgin Islands, and Puerto Rico. Earliest nesting season of all US species.
Kemp's ridley (Lepidochelys kempii) - Listed Endangered. The most endangered sea turtle species. Nests primarily on Texas beaches, with some nesting in Florida. Nesting season April through July.
Hawksbill (Eretmochelys imbricata) - Listed Endangered. Nests in Florida, US Virgin Islands, and Puerto Rico. Nesting season June through November in the Caribbean.
Nesting Season Dates
Nesting season varies by state, but generally:
Florida: May 1 - October 31 (statewide). Some counties extend the season based on local nesting data. Leatherback nesting can begin as early as March.
Georgia: May 1 - October 31
South Carolina: May 1 - October 31
North Carolina: May 1 - November 15
Texas: April 1 - September 15 (Kemp's ridley)
US Virgin Islands/Puerto Rico: Year-round (various species)
During nesting season, the following restrictions apply to beaches and adjacent areas.
Beach Construction Restrictions
Direct Beach Work
No mechanised activity on the beach during nesting season without specific authorisation. This includes:
- Beach nourishment (sand placement)
- Dune restoration
- Seawall construction or repair
- Beach access construction
- Vehicle driving on the beach (except authorised patrols)
Beach nourishment projects are typically restricted to November 1 - April 30 in most southeastern states. Projects that must occur during nesting season require an Incidental Take Permit (Section 10) or Biological Opinion (Section 7) from USFWS and daily nest surveys by authorised monitors.
Construction Adjacent to the Beach
Projects on beachfront or near-beach property during nesting season must:
Conduct daily nest surveys if construction activities could affect the beach. A USFWS/FWC-authorised marine turtle permit holder must survey the project's beach frontage each morning before work begins. If a nest is found, a buffer (typically 10-30 feet, depending on the state) is established and no work is permitted within the buffer until the nest hatches.
Install and maintain nest markers. Located nests are marked with stakes and tape, and GPS coordinates are recorded. Nests are monitored throughout incubation (approximately 50-60 days).
Limit beach access. Construction equipment, materials, and debris must not be stored on the beach during nesting season. Beach access points used by construction traffic may need to be limited or relocated if they're near nesting activity.
Lighting Restrictions
Sea turtle lighting ordinances are the restriction that catches the most developers off guard. Hatchling sea turtles navigate to the ocean using the natural light of the horizon over the water. Artificial lighting visible from the beach can disorient hatchlings, causing them to crawl inland instead of toward the ocean - with fatal consequences.
What's Regulated
Most coastal counties in Florida and other southeastern states have lighting ordinances that apply to properties visible from the beach. These typically cover:
All exterior lighting on beachfront and near-beach properties:
- Building-mounted lights
- Parking lot lighting
- Pool and landscape lighting
- Pathway and security lighting
- Sign illumination
- Temporary construction lighting
Interior lighting visible from the beach through windows:
- Requirements for window tinting, blinds, or curtains
- Some ordinances require non-reflective glass
Timing: Lighting restrictions typically apply during nesting season (May 1 - October 31 in Florida), but some ordinances are year-round for new construction.
Compliance Requirements
Turtle-friendly lighting must meet these criteria:
Long wavelength. Amber, orange, or red lights (wavelengths above 560nm). White, blue, and green light is most disorienting to turtles and is prohibited.
Low-mounted. Fixtures should be as low as possible and aimed downward. No uplighting or unshielded fixtures visible from the beach.
Shielded. All fixtures must be fully shielded so the light source is not visible from the beach. Full cutoff fixtures that direct light downward are preferred.
Recessed. Where possible, lights should be recessed into soffits, overhangs, or walls to prevent light from reaching the beach.
Motion-activated. Security lighting should be motion-activated rather than always-on, and should use turtle-friendly wavelengths.
Common Lighting Violations
- Standard white LED exterior fixtures (must be amber/orange LEDs)
- Unshielded wall pack lights on beach-facing facades
- Parking garage lighting visible from the beach
- Pool lights not properly shielded
- Interior lights visible through uncovered windows during nesting season
- Construction lighting used during nighttime work
Design Implications
For new construction on beachfront property, turtle-friendly lighting must be designed into the building from the start. This affects:
- Exterior lighting specifications (amber LEDs, full cutoff fixtures)
- Window design (tinting, recessing, orientation)
- Balcony and terrace lighting
- Landscape and pathway lighting
- Parking structure design
- Signage illumination
Retrofitting an existing building to meet turtle lighting standards is significantly more expensive than designing for compliance from the outset.
The Permit Process
Federal (USFWS/NMFS)
Projects that may affect sea turtles or their habitat require ESA compliance:
Section 7 consultation for projects with a federal nexus. The USACE frequently triggers Section 7 for beach nourishment projects permitted under Section 404/Section 10 of the Rivers and Harbors Act.
Section 10 Incidental Take Permits for private projects without a federal nexus that may result in incidental take (e.g., beachfront construction during nesting season).
State (FWC in Florida)
Florida requires:
Marine Turtle Permits for any activity that may affect sea turtle nesting. This includes beach construction, beach nourishment, dune restoration, and artificial lighting projects.
Authorised Marine Turtle Permit Holders must conduct nest surveys and monitoring. Only individuals with FWC Marine Turtle Permits are authorised to handle nests, mark nesting areas, and relocate nests when necessary.
Sea Turtle Lighting Compliance. FWC reviews lighting plans for new beachfront development and can require modifications before issuing permits.
Building Permits
Most coastal counties require turtle-friendly lighting certification as a condition of building permit issuance. A lighting plan prepared by a qualified professional (architect, engineer, or lighting designer) demonstrating compliance with the local sea turtle lighting ordinance is typically required.
Practical Tips for Coastal Projects
Design for lighting compliance from day one. Don't treat turtle lighting as an afterthought. Include a turtle-friendly lighting plan in your initial design package. This avoids costly redesigns and permit delays.
Schedule beach work for November - April. If your project involves any work on the beach itself, plan for the non-nesting season window. Beach nourishment, dune work, and seawall construction should be completed before May 1.
Budget for nest surveys. If your project is on or adjacent to the beach and construction will occur during nesting season, budget for daily nest surveys by an authorised permit holder. Survey costs are typically $200-500 per day, 7 days per week, for the duration of nesting season construction.
Know your local ordinance. Sea turtle lighting ordinances vary by county and municipality. Florida counties have particularly detailed requirements. Review the specific ordinance for your project location early in the design process.
Consider cumulative light. Even if individual fixtures comply, the cumulative light from a large development can still affect sea turtles. A lighting analysis showing the total illumination visible from the beach may be required.
Educate your construction team. Construction crews working near beaches during nesting season need to understand the restrictions. A pre-construction briefing covering nest identification, work stoppage procedures, and lighting requirements is essential.
Desktop Screening for Coastal Projects
Before designing a coastal project, check what sea turtle species nest in your area and what the local nesting density is. High-density nesting beaches have stricter enforcement and more intensive monitoring requirements.
EcoCheck US searches GBIF for sea turtle occurrence records near your project location. The results show which species have been documented in the area, how recently, and from what data sources. Combined with FWC nesting data (for Florida) or state wildlife agency data (for other states), this helps you assess the level of sea turtle management your project will need.
For linear coastal projects (beach access roads, utility corridors, coastal infrastructure), the Corridor Search feature identifies which sections of your route have the highest concentration of sea turtle records and where nesting season restrictions will be most impactful.
Key Legislation
- Endangered Species Act (16 U.S.C. 1531-1544) - all five US nesting species listed
- Marine Turtle Protection Act (Florida Statute 379.2431)
- Florida Administrative Code 68E-1 (Marine Turtle Protection)
- USFWS Sea Turtle Conservation Guidelines
- Local sea turtle lighting ordinances (county/municipal level)
The Bottom Line
Sea turtle nesting season is not negotiable. The species are federally protected, the penalties are severe ($25,000 per violation under ESA), and the restrictions are strictly enforced on every nesting beach in the southeastern United States.
Plan your construction schedule, design your lighting, and budget for monitoring from the very start of your coastal project. The consultants and developers who treat sea turtle compliance as a design constraint rather than a last-minute obstacle are the ones whose projects stay on schedule.
Patrick O'Connor is a Freelance Ecologist at Kinterra Consulting and the developer of EcoCheck US - an instant ecological desktop assessment tool for any US location. Try it free at ecocheckus.com.