Approximate - nearest available gauge. Use as general reference only.
Parking on Charles Street, just before it meets and turns onto Five-and-a-half-mile Road, there's an outlot (greenspace) between a home and a wooded lot. Walking east to the lake, a short trail down the dirt (or muddy) bluff leads to a fine sand beach. There are a few random rocks and stonework breakwalls, but most of the beach is somewhat steeply sloped sand.
At times, the waves will break better here than at Cliffside or at Wind Point. Another advantage can be that when the winds have a strong northerly component, the rip currents sweeping south down the shore will be taking you into shore in the bay formed by Wind Point, rather than (if you surf at Wind Point) sweeping you out into the middle of the bay (thus away from shore) to the south of Wind Point.