''July can be the foggiest time of the year, as residents of the New England coastal areas know well. Many summer vacationers, attracted by the refreshing coolness of the ocean breezes, complain when sea fog obscures the sun and spoils a beach day for sun-bathing and swimming. {That's because} in July the greatest contrasts exists between the relatively cool ocean waters and the hot air masses from the continent.''

From The Country Journal New England Weather Book, by David Ludlum