The Seahawks (1-1)held a slim two-point lead midway through the first half, but held Chestnut Hill to eight points for the next ten minutes, coasting out to a 43-23 advantage at the break.
The Griffins, who shot just 22 of 62 from the field, made a late charge but couldn't only cut the deficit to eight with 3:33 remaining.
Marcus Burton hit a layup and four late free throws to keep the Seahawks on top.
Filip Sekulic led Chestnut Hill with a game-high 23 points and grabbed a team-high 10 rebounds for a double-double.
Wagner shot 43.1 percent from the field and had two other players in double figures, with Kenneth Ortiz and Burton each finishing with 12.
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