Massachusetts ? A weakening Hurricane Bill spun northward Saturday, churning up rough seas, creating dangerous rip tides and closing beaches to swimmers up and down the eastern seaboard, including President Barack Obama’s planned vacation spot, Martha’s Vineyard.

The Category 1 hurricane was expected to pass the mainland well off New England, but was still packing high winds and waves that had safety officials urging extreme caution.

At Robert Moses State Park in New York, the beach was shut down as the high tide submerged the sand, though the beach opened later Saturday for sunbathing. Along some beaches in Delaware and New Jersey, no swimming was allowed.