King tides that rolled into the Bay Area midmorning on Sunday could bring minor flooding to low-lying areas along local shorelines, including the Palo Alto Baylands, forecasters said.
The National Weather Service on Saturday issued a coastal flood warning effective from 8 a.m. Sunday to 2 p.m. Monday.
High tide will occur mid- to late morning on Monday, as it did on Sunday.
King tides, which can be over 2 feet higher than the average tide, occur only a few days in the winter when the orbits and alignment of the Earth, sun and moon combine.
San Francisco's tide is forecast to be just under 7 feet, the weather service said.
Coastal residents should be on alert for rising water, and visitors to beaches are warned they could be stranded in coves and on narrow beaches.
High tide heights will follow on Tuesday and are expected to taper off over the remainder of the week, the weather service said.
The next king tides are expected Dec. 13-15. The California Coastal Commission invites the public to help create a record of changes to the coast and estuaries by taking photos of king tides and submitting them to the California King Tides Project.
In January, the higher-than-normal king tides provided for rare bird sightings at Palo Alto Baylands Nature Preserve.