The first page of The Newport Tide Almanac for the Year 1864 offers the following:
RULES FOR BATHING AT NEWPORT BEACH.
From the 25th day of June to the 20th day of September, no one can bathe unless clad, from 8 o’clock, A.M., until 1, P.M., nor from 3, P.M., until 8, P.M.
At any time before 8, A.M., and between1 and 3, P.M., all persons may Bathe, with, or without dresses.
A White flag is hoisted at 8 o’clock, A.M., to announce the hours of female bathing; at one o’clock, P.M., a red flag is hoisted as the signal for indiscriminate bathing, which flag is kept up until 3 o’clock, P.M., when it is lowered and the white flag hoisted and kept up until 8 o’clock, P.M.
