Lifeguards during Beach Season from May through. Sept. (Labor Bay Weekend) Public restrooms and outdoor showers but no changing rooms. Parking for all access points is free in a lot or on nearby streets. Allenhurst is a Borough in Monmouth County, New Jersey There are many historic homes in Allenhurst built during the late 19th and early 20th centuries in the Victorian, Tudor, and Colonial styles. Local ordinances have ensured the preservation of historical architectural by enforcing strict guidelines for the renovation of older homes.