The volunteer lifeboat crew launched their Atlantic 85 Inshore lifeboat Louis Simson at 6.30pm following reports to Dublin Coastguard from members of the public that several people appeared to be stranded on Shenick Island, just off the North Co Dublin town.
With David Knight at the Helm and crew Eoin Grimes, Peter Kennedy and Stephen Crowley, the lifeboat proceeded directly to the island and carefully manoeuvred into the shallow waters nearby.
Two crew members made their way ashore to assess the situation. The three periwinkle pickers were then assisted in wading through the water back to shore by the crew, with Irish Coast Guard helicopter Rescue 116 providing illumination from its powerful search lights.
In addition, the Skerries Coast Guard unit was waiting ashore to offer any further assistance required.
Speaking after the callout, Knight said: "We would remind anyone planning on walking along the shore or around the coast to make sure that they check the local tidal information before setting off."