Following water testing from Port Macquarie-Hasting Council staff, it is now safe to swim at Rainbow Beach in Bonny Hills.
The advice follows a controlled overflow from a wastewater treatment plant last week.
Port Macquarie-Hastings Council is continuing to monitor the water quality in Duchess Gully Creek and Rainbow Beach.
Lifeguards have erected flags at Rainbow Beach and it is now safe to swim. It is still important to stay up to date with the conditions.
Rainbow Beach was previously off limits to swimmers after treated overflow was released from the Bonny Hills/Lake Cathie Wastewater Treatment Plant into Duchess Gully Creek, which subsequently flowed to the beach.
The controlled overflow to maintain normal operations at the treatment plant followed heavy rains.
Beachgoer Neil Martin, who attended the beach on January 8, said he had been swimming on Wednesday morning before the beach closure announcement and he wasn't that concerned.
Beachgoer Jesse Hill, who attended the beach on January 8, said it was unusual to see the overflow water running out to the ocean last week.
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