Gloucester officials closed off swimming at a popular beach Friday following a report of a shark sighting.

This was the second shark warning at Good Harbor Beach this week.

“Please stay out of the water until further notice and follow lifeguard instructions,” officials advised in a post on Gloucester Beaches , a Facebook page managed by the city.

Officials initially closed the beloved spot – often ranked among the best in Massachusetts – around noon Thursday while the Harbormaster investigated a report of a sighting, but reopened it just after 3 p.m. due to no further observed shark activity.

Thursday’s initial advisory also came just one day after officials warned of a strong surf and rip currents expected this weekend.

“Starting as early as Thursday, August 21st th

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