Willoughby Park, the smallest of Seagrove's three parks, is one acre in area.

A simple curved promenade, skirted by a vegetated swale, forms the ‘backbone’ for the park's design.
A recycled power pole forms the ‘shaft’ of a striking propeller-inspired structure which provides shade and shelter. The structure overlooks an informal grassed play space, wrapped behind by a low seating wall retaining an extensive planted mound.

Surface runoff from the park is directed onto a raingarden, surrounding a remnant Swamp Gum Eucalyptus ovata, forming a focal point in the south-east corner.