I live in Manasquan/Wall Twp area.
I would advise:
155.49000 / 94.8 PL - Alpha : Manasquan PD
154.98000 / 131.8PL- Alpha : Manasquan FD/EMS DISP
154.0250 / 94.8PL - Alpha: Manasquan Fireground
154.3175/654DPL - Alpha : Manasquan Beach Ptrl.
This information is located in the "database" on this website.
Further, if you are not coming in the summer (I see you are in Montclair)
I would advise not doing beach patrol, but rather maybe listen to a surrounding town.
Your local surrounding towns would be: Wall Twp/Brielle/Belmar/ Spring Lake/ Spring Lake Heights.