Viewing satellite maps for ocean temperatures for 7 Oct, that Chatham MA number seems low - should be closer to 65. Some warmer water is trapped between Nantucket, Martha's Vineyard, and Chatham. And water temperatures along the coast from NC to Manasquan NJ should be closer to 68.
Chatham number appears to be a few degrees too low. But that Cape May numbers looks off by a 20 degrees.
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