Part of Purbeck beach was cordoned off and the bomb disposal unit deployed after a walker found a possible piece of ordnance.
Coastguards and the police were called to the scene yesterday (Friday).
A spokesman for Swanage Coastguard said: "The team were called to the beach by the Bull and Boat after a beach walker located a possible piece of ordnance.
"Part of the beach was temporary cordoned off whilst a team from the Royal Navy attended from Portsmouth.
"During the incident the item was located close to the wall and further detailed pictures were sent to the bomb disposal team.
"On their arrival they checked the item and confirmed it was a military item but was safe.
"If you see find something on the beach please call 999 - Coastguard
"Never move any item found or dig around the item.
"A massive thank you to the Bull and Boat who kindly provided support to the team."
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