TAMPA -- Brock Nelson scored two goals in the third period for the New York Islanders in a 5-1 win against the Tampa Bay Lightning at Amalie Arena on Monday.
Semyon Varlamov made 31 saves and Josh Bailey had a goal and an assist for New York (20-7-2), which has outscored the Lightning 10-3 in two victories this season.
"A real good team win. We needed a big goal and we got it," Islanders coach Barry Trotz said. "The special teams were huge, good goaltending tonight. Our compete level through the lineup was very good against a very good hockey team.
"There's always challenges in this building. Special teams, you get a shorthanded goal, a power-play goal, just all those elements in your game that you need. At the end there, we had our killer instinct."
[WATCH: All Islanders vs. Lightning highlights]
Steven Stamkos scored for Tampa Bay (14-11-3), which lost twice on a three-game homestand and is 1-4-0 in its past five home games. Curtis McElhinney made 19 saves.
"It's tough because we're working hard and putting a great effort forward," Lightning defenseman Kevin Shattenkirk said. "Obviously we're not getting the results we want, but we can't change anything because it's a blueprint for success."
Nelson gave the Islanders a 3-1 lead with an unassisted goal at 7:31 of the third period, then made it 4-1 with a wrist shot from the slot at 14:41.
Video: NYI@TBL: Nelson roofs shot home off own rebound
"They had some pressure there, but we able to weather it," said Nelson, who has three goals in his past three games. "Just a good road win against a good team. Comeback effort for us after the last one (a 3-1 loss at the Dallas Stars on Saturday)."
Ross Johnston gave the Islanders a 1-0 lead at 6:44 of the second period with a wrist shot from the right circle.
Bailey made it 2-0 on a shorthanded breakaway at 8:37 of the second after the Islanders thwarted a 4-on-2 rush and Casey Cizikas made a diving outlet pass.
"It does [change the momentum]," Bailey said. "We've had it happen to us the opposite way, and it's always a bit of a wind-out-of-your-sails moment. It was good by Casey sticking with it and springing me on the break."
Video: NYI@TBL: Bailey snaps shot home on breakaway for SHG
Stamkos scored his 10th goal of the season to make it 2-1 at 15:35 of the second period.
"We shot ourselves in the foot," Lightning coach Jon Cooper said. "The shorthanded goal, we can't give that up."
Anders Lee scored his first power-play goal of the season with 3:55 remaining for the 5-1 final.
The Lightning had a goal from Victor Hedman at 9:53 of the third period reversed when video review determined Anthony Cirelli was offside.
"Well I mean, how many posts tonight? Four or five, a disallowed goal; it was offside, but that felt like one of those games that we deserved a lot better," Stamkos said. "I thought the second and third period we worked hard, plenty of chances. They just didn't go in tonight."
Video: NYI@TBL: Stamkos spins, slips backhand past Varlamov
They said it
"It's all about the team. [It was a] team win. I've got to give the credit to this team. The boys are battling in front of me, playing really good defensively like tonight." -- Islanders goalie Semyon Varlamov
"For whatever reason, the last game (a 7-1 win against the San Jose Sharks) everything went in and tonight nothing went in. We'll continue to work hard, turn the page and get a win [Tuesday against the Florida Panthers]." -- Lightning captain Steven Stamkos
Need to know
It's the first time the Islanders have won 20 of their first 29 games. ... New York is 18-0-1 this season when it scores at least three goals and 55-2-3 under Trotz. … Islanders defenseman Nick Leddy (lower-body) did not play and is day-to-day. … New York center Mathew Barzal had an assist and has six points (three goals, three assists) in his past six games. … New York blocked 18 shots; defensemen Scott Mayfield and Johnny Boychuk had three each. … Tampa Bay went 0-for-3 on the power play. … Lightning forward Tyler Johnson (lower body) did not play and is also out Tuesday. … Lightning forward Mitchell Stephens made his NHL debut and was minus-2 in 8:28 of ice time.
Islanders: At the Florida Panthers on Thursday (7 p.m. ET; FS-F, MSG+, NHL.TV)
Lightning: At the Florida Panthers on Tuesday (7 p.m. ET; SNE, SNO, SNP, FS-F, SUN, NHL.TV)
Video: Nelson, Bailey lead Islanders past Lightning, 5-1