The new moon of Jan. 18 presides over another spell of extra-high morning tides, at more than 6 feet. The corresponding extra-lows occur in the late-afternoon darkness. Winter afternoon beachcombing in the promised clear weather is sure to spark interest.

With the birth of the first elephant seal pups, Drakes Beach hours are now 10 a.m. to 4 p.m. until late April. More and more seals continue to arrive around the Headlands beaches, and a…