Alexander Romanov scored, and Semyon Varlamov made 24 saves for New York (5-5-3), which has lost four in a row (0-3-1).
“At certain parts of the year, you're going to go through adversity, and we're going through it right now,” Islanders forward Bo Horvat said. “I mean, I thought, obviously, we had our chances tonight. It's just a matter of it going in for us. Right now, we got to bear down around the net, obviously, and start scoring some goals.”
Ovechkin gave the Capitals a 1-0 lead at 9:18 of the first period. Evgeny Kuznetsov won a face-off back to Ovechkin, who scored just inside the post under the glove of Varlamov from the left circle.
It was Ovechkin's first even-strength goal this season (one power-play goal, two into an empty net).
Romanov tied it 1-1 at 19:17, shooting into an open net after Shepard got caught out of position.
Dowd responded for Washington to make it 2-1 at 13:05 of the second period. Varlamov made a highlight-reel save by diving to get his glove on a rebound attempt from Nicolas Aube-Kubel, but Dowd batted in the rebound in the crease.
“We have some decisions that are made and some errors that are made that are really costing us,” Islanders coach Lane Lambert said. “There's a change on the second goal that can't happen. So these types of things, when you make these mistakes, you find yourself on the losing end. ... How do you get out of it? You've got to stop making those mistakes.”