How Often Should You Bottom Paint Your Yacht?

Bottom paint (antifouling paint) is your yacht's first defense against marine growth. In Florida's warm waters, growth happens fast—and improper maintenance can mean significant performance loss and fuel consumption increases.

The Short Answer

For most South Florida yachts: every 12-18 months.

However, this varies significantly based on several factors. Some boats need fresh bottom paint annually, while others can stretch to two years.

Factors That Affect Bottom Paint Life

Water Temperature

Florida's warm waters (75-85°F year-round) accelerate marine growth dramatically compared to cooler regions. Barnacles, algae, and other organisms thrive here.

How Often You Use the Boat

Ironically, boats that move regularly often need less frequent painting. Movement helps the antifouling coating work properly. A yacht that sits unused for months develops growth faster.

Paint Quality

Premium antifouling paints (like Interlux Micron or Pettit Trinidad) last longer than economy brands. The upfront cost difference is usually offset by longer intervals between haul-outs.

Regular Bottom Cleaning

Monthly diver cleanings extend paint life significantly. A diver removing soft growth prevents it from becoming hard growth that damages the paint surface.

Signs Your Bottom Paint Needs Replacing

Reduced speed at normal RPM
Increased fuel consumption
Visible bare spots or primer showing through
Hard growth that won't come off during diver cleaning
Paint flaking or peeling

Bottom Paint Cost Estimate

Yacht Size	Typical Cost
30-40 ft	$2,500 - $4,000
40-50 ft	$4,000 - $6,500
50-70 ft	$6,500 - $12,000
70+ ft	$12,000+

*Includes haul-out, pressure wash, and two coats of quality antifouling

How to Extend Bottom Paint Life

Schedule monthly diver cleanings — The single best investment
Use your boat — Regular movement helps
Don't cheap out on paint — Premium paint saves money long-term
Apply proper coats — Two full coats minimum, extra on waterline
Replace zincs regularly — Protects both running gear and paint

The Bottom Line

Plan for annual bottom paint in South Florida, but with proper maintenance (monthly cleanings, quality paint, regular use), you may be able to extend to 18 months. Don't wait until performance suffers—by then, you're also looking at prop cleaning and potentially more extensive work.

Need help coordinating your yacht's bottom work? Get a free quote from our team. We work with the best boatyards in South Florida.