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Reliable Diving & Underwater Services in California (2026)

Finding reliable Diving & Underwater Services in California means trusting someone to work where you can't see — so reputation matters. This list highlights well-reviewed local pros with strong track records across hull cleaning, underwater repairs, and more. Compare quotes from these trusted contractors to find the right fit for your boat.

By Boatwork in California·10 pros·1107 lists by this author·June 11, 2026·Updated July 8, 2026
10 pros
Dinu's Dive logo

Dinu's Dive

4.9(74)
(562) 270-4548Long Beach, CAGet Directions
Long Beach, CAHull & Bottom CleaningDiving & Underwater ServicesBoat Detailing & Cleaning

About Dinu's Dive

Operating out of Long Beach, California, Dinu's Dive brings a family-owned approach to professional underwater marine services. With a foundation built on quality workmanship and transparent communication, this diving services company has established itself as a reliable resource for boat owners seeking comprehensive hull maintenance and underwater inspection services throughout...

My ThoughtsRated 4.9 across 73 reviews, Dinu's Dive stands out for consistent quality across hull cleaning, diving services, and boat detailing — a broad skill set backed by a large volume of satisfied customers.
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WP

Western Precision Diving

4.8(68)
(619) 717-0826San Diego, CAGet Directions
San Diego, CABoat Surveying & InspectionHull & Bottom CleaningDiving & Underwater Services

About Western Precision Diving

Operating out of San Diego, California, Western Precision Diving specializes in professional underwater services for the marine industry. The business has built its reputation on delivering precise, reliable diving and underwater inspection work for boat owners, marinas, and commercial marine operations throughout the Southern California coast. With a focus on...

My ThoughtsWestern Precision Diving holds a 4.8 rating from 68 reviews and covers both underwater services and boat surveying, making them a solid choice for owners who want inspection and maintenance handled together.
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Justin Time Diving logo

Justin Time Diving

5.0(25)
+1-619-354-0027San Diego, CAGet Directions
San Diego, CAHull & Bottom CleaningDiving & Underwater ServicesBoat Detailing & Cleaning

About Justin Time Diving

Operating in the San Diego area since 2015, Justin Time Diving has established itself as a specialized provider of hull cleaning and underwater services throughout Southern California's coastal waters. With nearly a decade of hands-on experience servicing thousands of vessels of varying sizes, construction types, propulsion systems, and bottom paint...

What others are saying about Justin Time Diving

What stands out most across reviews is Justin Time Diving's unwavering reliability—customers consistently describe them as the most dependable marine service they've worked with. Known for their meticulous hull cleaning and zinc replacement services,...

Reviews sourced from Google

My ThoughtsJustin Time Diving carries a perfect 5.0 rating from 25 reviews and brings 11-plus years of experience to hull cleaning, diving services, and bottom painting — a dependable track record for antifouling work.
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360 Hull Diving logo

360 Hull Diving

5.0(29)
(510) 480-5527Pacifica, CAGet Directions
Pacifica, CAHull & Bottom CleaningDiving & Underwater ServicesBoat Repair & Maintenance

About 360 Hull Diving

Operating in the San Francisco Bay Area since 2021, 360 Hull Diving has established itself as a reliable provider of professional underwater marine services for boat owners throughout the region. Based in Rockaway Beach, California, their team of skilled commercial divers specializes in comprehensive hull maintenance and underwater boat care...

What others are saying about 360 Hull Diving

Customers repeatedly praise 360 Hull Diving for their comprehensive range of underwater services and exceptional attention to detail. From routine hull cleaning to thorough bottom paint and zinc assessments, Luiz and his team consistently deliver pro...

Reviews sourced from Google

My Thoughts360 Hull Diving scores a perfect 5.0 from 29 reviews and has been building its reputation for over five years, focusing on hull cleaning, diving services, and boat repairs.
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FastBottoms Hull Diving logo

FastBottoms Hull Diving

4.8(36)
(925) 671-2826Martinez, CAGet Directions
Martinez, CAHull & Bottom CleaningDiving & Underwater ServicesBottom Painting & Antifouling

About FastBottoms Hull Diving

Operating in the San Francisco Bay Area since 1994, FastBottoms Hull Diving has built a reputation on delivering prompt and professional underwater hull maintenance services to boat owners throughout the region. With over three decades of hands-on experience and more than 50,000 hull cleaning events completed, the team has developed...

My ThoughtsWith 32-plus years in business and a 4.8 rating from 36 reviews, FastBottoms Hull Diving brings deep experience in hull cleaning and bottom painting to every job.
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Maia's Diving Solutions logo

Maia's Diving Solutions

5.0(38)
(510) 932-3784Oakland, CAGet Directions
Oakland, CABoat Surveying & InspectionHull & Bottom CleaningDiving & Underwater Services

About Maia's Diving Solutions

Operating out of Oakland, California, Maia's Diving Solutions has built a reputation for delivering precision underwater maintenance and care for vessels throughout the San Francisco Bay Area. Founded by Cayo Maia, a commercial diver and dive supervisor with over a decade of experience in complex marine environments, the business was...

My ThoughtsMaia's Diving Solutions earns a perfect 5.0 from 33 reviews, with specialties spanning hull cleaning, diving services, boat surveying, and repairs — a well-rounded option for thorough underwater assessments.
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BC

Brian Cline Marine Services

5.0(15)
(415) 529-0272Belvedere, CAGet Directions
Belvedere, CACaptains & CrewHull & Bottom CleaningDiving & Underwater Services

About Brian Cline Marine Services

Operating across San Francisco Bay's marinas and harbors, this full-service marine company brings nearly two decades of hands-on experience to boat owners seeking comprehensive care for their vessels. Founded and operated by Brian Cline, a USCG Licensed Master and US Sailing Cruising Instructor, the business has established itself as a...

What others are saying about Brian Cline Marine Services

Clients return to Brian Cline Marine Services for his exceptional underwater hull cleaning service that sets the standard in the Bay Area. What truly sets Brian apart is his comprehensive video documentation and detailed reports that give boat owners...

Reviews sourced from Google

My ThoughtsBrian Cline Marine Services holds a perfect 5.0 rating from 15 reviews, offering hull cleaning and diving services alongside boat detailing and captain services for a versatile on-water package.
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SA

S and K Dive Service

4.7(15)
310-822-8349Marina del Rey, CAGet Directions
Marina del Rey, CAHull & Bottom CleaningDiving & Underwater ServicesBoat Detailing & Cleaning

About S and K Dive Service

Operating out of Marina del Rey since 1970, S and K Dive Service has built a reputation as one of the largest and most reliable underwater boat maintenance providers in Southern California's premier boating community. Founded by Paul Skipper, who retired in 2022 after five decades of dedicated service, the...

My ThoughtsS and K Dive Service has been in business for over 56 years and carries a 4.7 rating from 15 reviews, covering hull cleaning, detailing, and bottom painting with decades of hands-on experience.
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Pacific Yacht Service logo

Pacific Yacht Service

5.0(19)
+1 714-660-0809Huntington Beach, CAGet Directions
Huntington Beach, CAHull & Bottom CleaningDiving & Underwater ServicesBoat Detailing & Cleaning

About Pacific Yacht Service

With over six decades of experience serving the yachting community, Pacific Yacht Service has established itself as a trusted provider of comprehensive marine maintenance solutions in Huntington Beach, California. The company specializes in hull cleaning, dive services, topside detailing, and anode replacement, delivering personalized care that has kept vessels in...

My ThoughtsPacific Yacht Service holds a perfect 5.0 from 18 reviews, with a specialty mix that includes hull cleaning, diving services, detailing, and bottom painting for comprehensive below-waterline care.
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CM

Cabrillo Marine Services

5.0(7)
619-504-9334National City, CAGet Directions
National City, CABoat Surveying & InspectionHull & Bottom CleaningDiving & Underwater Services

About Cabrillo Marine Services

Operating in the heart of San Diego's bustling marine corridor, Cabrillo Marine Services has built a reputation as a specialized underwater yacht maintenance provider serving National City and the greater San Diego harbor area. The business focuses exclusively on what happens below the waterline, offering boat owners a comprehensive suite...

What others are saying about Cabrillo Marine Services

Reviewers consistently highlight Kevin's exceptional hull cleaning service and meticulous attention to detail. On the communication front, customers particularly appreciate the photos and videos he provides after each dive, giving boat owners clear d...

Reviews sourced from Google

My ThoughtsCabrillo Marine Services has a perfect 5.0 rating from 7 reviews, offering hull cleaning, diving services, surveying, and bottom painting — an early but spotless record worth considering for a quote.
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