This is how I understand coastal air flow without outside influences. Sunshine warms land faster than water. Warm air rises. The rising air creates a vacuum at lower altitudes over land which gets filled in by onshore winds. After sunshine leaves rising coastal columns fall and create offshore winds. I’ve observed these trends in coastal Texas for most of my life.
Thank you.
Can’t say as I’ve experienced the off-shore part of your explanation, though. Not saying you are wrong, but I pretty much remember going from on-shore to almost a dead calm.
Latitude and the presence of alternating ocean, land mass (Long Island) and large body of water (Long Island Sound) may be a reason why I haven’t experienced it.
Was on the water for about 40 years but I’ve been inland for the last 20.
Thanks again