|Sunday's full moon will be a harvest moon, a perigee, the year's largest supermoon, and a total eclipse.
Astronomer Bob Berman explains further on the website of The Old Farmer's Almanac. He titled his article Mega-Harvest-Blood Moon Total Eclipse. The moon rising over Provincetown harbor is likely to be a reddish, sort of golden color, and likely to appear even more colorful when it rises on the following night, about 40 minutes later, after the sky is darker.
Anywhere along the harbor beaches you should find a good spot to watch the rising moon, once the sun sets, and later, Sunday's eclipse will be at its height between 10:11 PM and 11:24 PM, Eastern Time. Watch for exceptionally high tides for a few days, too, with Wednesay's tide hitting around 11.6 feet at 1:41 PM.
A very high tide seems always to be followed by an extremely low one, so Tuesday and Wednesday sunrises on the tidal flats should be great for beachcombing, and may also bring some exceptional photo opportunities, around 6:30 AM.