Salt air is the main reason a shore exterior fails early. Onshore wind leaves a film of salt on siding and trim, and paint applied over it loses its grip, so on any house within reach of the ocean or the bays we wash the walls and let them dry before scraping or priming anything. The worst wear is on the elevations that face the water, where salt, wind-driven rain and reflected sun all hit the same wall. We scope those faces separately from the sheltered sides of the house, because they need more prep and often a tougher trim product, and quoting the whole house at one rate hides that.
Horizontal surfaces fail first: window sills, porch rails, the tops of trim boards and the bottom edges of clapboard. That is where water sits, and on older shore houses it is usually where the rot starts. We probe soft wood, cut out and replace what is gone rather than caulking over it, spot-prime bare wood, and re-caulk the joints that move. In towns like Long Branch, Monmouth Beach, Deal, Asbury Park and Avon-by-the-Sea, that prep is most of the job, and it is what decides whether a repaint lasts or starts peeling in two or three seasons.
Timing matters too. Morning dew on a coastal house can sit on the shaded walls until late morning, and fall evenings bring it back early, so we plan exterior work around surface moisture as well as air temperature. Spring through early fall is the main exterior season here. Shore towns are also busiest in summer, so for houses in the beach boroughs we often recommend booking in late spring or after Labor Day.