Dziuba said the West End Beach will be open until about June 15 until the contractor, George Harms Construction Company, moves further north to continue work.
A fence was placed around the beach entrance earlier this week to keep pedestrians and potential beachgoers from entering the area.
The beach itself at Brighton Avenue will still be open, but an area will be fenced off from the sea wall about 100 feet east while work is being done. Lifeguards will also be posted and people can make their way there from other access points if they wish.
Long Branch Business Administrator Howard Woolley said the city will keep residents posted on any and all beach closures.
"As we ascertain what is going to be closed and what's going to be open, we plan to use every method available to us to let the public know," Woolley said.
The city is currently only charging residents to use city beaches on weekends but will charge during the week beginning June 13.