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Town of Southampton, Suffolk County · East End / South Fork

UNDERWATER MARINE SERVICES
SAG HARBOR, NY

Professional dive crews serving Sag Harbor and the surrounding waterways. Hull inspections, dock and seawall work, and item recovery — done in the water, no haul-out required.

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Serving Sag Harbor, NY

LOCAL DIVE CREWS, ON YOUR WATER

Sag Harbor's deepwater village marina draws yachts from across the East End and beyond. For vessels berthed at the Sag Harbor Village Marina, Waterlink Marina, or the Sag Harbor Yacht Club, Final Dive Co. provides professional dockside underwater services — hull inspections, running-gear checks, and recovery — without the wait or expense of hauling out at a South Fork yard.

Where We Work in Sag Harbor

Our Sag Harbor service area covers Sag Harbor Bay, Shelter Island Sound, and Peconic Bay — including Sag Harbor Village Marina & Town Dock, Waterlink Marina, and Sag Harbor Launch & Moorings, and the waters off Sag Harbor Yacht Club. Don't see your marina or dock? We travel the whole shoreline — call us and we'll come to you.

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What We Do

EVERYTHING BELOW THE WATERLINE

Marine & Boating

  • Boat hull inspection & cleaning
  • Propeller & outdrive inspection
  • Anchor & mooring inspection
  • Raw water intake clearance
  • Zebra mussel inspection

Dock & Waterfront

  • Dock maintenance
  • Piling inspection
  • Seawall inspection & repair
  • Post-storm debris assessment
  • Ice damage inspection

Specialty Services

  • Underwater surveys
  • Underwater photography
  • Item recovery
  • Pool leak detection
Why Hire FDC in Sag Harbor

CATCH IT BEFORE IT COSTS YOU

No Haul-OutFull underwater assessment right at your Sag Harbor Bay slip.
20–40%Fuel drag from biofouling. A clean hull saves on every trip.
Same-DayFast response for post-storm and ice-damage inspections.
Full ReportDocumented findings delivered after every inspection.
Client Reviews

TRUSTED ON THE WATER

★★★★★

Avoided an expensive haul-out thanks to Final Dive Co. They inspected my 45ft yacht's hull, swim platform, and anchor system in one visit. Clean report and great advice. These guys go where others won't.

Emma · Google Review
★★★★★

We have a private dock and finally found a team we had an excellent experience working with. They provided specialized underwater labor.

Christopher · Google Review
★★★★★

After last winter's ice damage I called Final Dive Co for a seawall and piling inspection. Same-day response, clear plan, saved me from bigger problems. A++++.

Dominick · Google Review

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Working Conditions in Sag Harbor

WHAT WE ACTUALLY FIND DOWN THERE

Every body of water on Long Island dives differently. Here is what our crews plan for when we work Sag Harbor Bay, Shelter Island Sound, Noyack Bay and Northwest Harbor.

Bottom Conditions

Sand and shell through the harbor with deeper mud in the basins and along the wharf. Well-scoured bottom near the harbor entrance where current works.

Tide & Current

Moderate tidal range with real current through the Shelter Island Sound approaches. Inside the protected harbor conditions are manageable, which is part of why the harbor supports the deep-draft yachts it does.

Visibility

Good by Long Island standards. Six to twelve feet is achievable on clean water, dropping in the inner harbor basins and after weather.

Fouling Pressure

Moderate to heavy. High-salinity East End water supports substantial hard growth on running gear and underwater metals.

The Sag Harbor Detail That Matters Most

Sag Harbor hosts significant large-yacht traffic. Deep-draft vessels, complex running gear and high-value hulls mean the inspection work here skews toward detailed documentation and pre-purchase or pre-insurance survey support.

Common Questions

SAG HARBOR DIVE SERVICES, ANSWERED

Do you support marine surveys on large yachts?

Yes. We provide the underwater portion of survey work: hull condition, running gear, shafts, struts, rudders, thrusters, intakes and anodes, with photographic and video documentation suitable for surveyor, insurer and buyer review.

Can you inspect a hull before a purchase without a haul-out?

We can give you a documented underwater condition assessment in the water, which for many buyers is enough to decide whether a haul-out is warranted. It is a diagnostic step, and it frequently saves the cost of hauling a boat that turns out to have problems.

Do you cover Noyack and Northwest Harbor?

Yes. Our Sag Harbor service area includes Sag Harbor Bay, Noyack Bay, Northwest Harbor and the surrounding private waterfront.

We Also Work Nearby

Shelter IslandGreenportSouthamptonMontauk All Service Areas

More reading: Seasonal Inspection Guide · Hull Fouling & Vessel Performance · Dock & Bulkhead Maintenance

NEED A DIVE CREW IN SAG HARBOR?

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