The fourth of the American J-Class yachts built in 1930 in response to Sir Thomas Lipton's America's Cup Challenge was Weetamoe, which was designed by Clinton Crane. Weetamoe is said to have been the closest rival to Enterprise to be the Cup defender.

She was constructed using the highly expensive tobin bronze and was the narrowest of the early four. Charles Nedwick, in Ian Dear's book Enterprise to Endeavour, describes Weetamoe as having a profile "that is practically a triangle, with a straight line from the after end of the waterline to the bottom of the keel and thence a line which is slightly convex, and then slightly concave to the forward end of the waterline."

In an attempt to better performance and make her less tender, her profile below the water was radically altered in 1934 with a new contour and bulb keel. The alterations failed and not long afterwards were reversed. In common with the other Js, she had about 43' (13m) of overhang and her hull.

Nicholson is said to have opined, "(Weetamoe) was the best of all the US Js".