The Warriors (4-0) took a 27-23 halftime lead and survived a tightly played second half to beat the Hawks (0-4) at South Berwick.
Maren Maxon led Wells with 20 points. Payton Maxon tossed in 11.
Isabelle Tice paced Marshwood with 17 points, and Piper Catanese chipped in with nine.