Timo Meier scored for the Sharks (21-17-2) who lost in regulation for the second time in their past five games (3-1-1). Tomas Hertl scored and had an assist, and Adin Hill made 16 saves.
"I think that first period we were good," Sharks coach Bob Boughner said. "I thought the only thing we had going early on was Hertl. There were flashes on some other lines here and there, but it just wasn't for 60 the minutes we need. We can't depend on one line. When you're on the road against a team that's desperate, it's harder to win, and you have to do the things that we talked about every day, and you have to have an identity that we know gives us success. I don't think there was enough tonight."
Hertl made it 1-0 at 38 seconds of the first period after Kraken forward Alex Wennberg threw the puck into the high slot. Alexander Barabanov intercepted, and passed to Hertl, who scored.
"They managed the game better," Hertl said. "This is a tough loss because everybody knows what is coming, you know, just last five games before the break. It's probably one of the toughest road trips for now in the NHL. We've we played some good hockey against good teams at home, and we just didn't show up today."
Seattle tied it 1-1 at 8:25 of the second period when Giordano found Soucy alone in the face-off circle at 4:18. Soucy took a couple of strides and scored with a wrist shot to make it 1-1.
Ryan Donato appeared to score 6:45 but the Sharks successfully challenged for offside.
Soucy scored at 8:25 to make it 2-1. The Seattle defenseman got tangled with Wennberg in the slot before finding the puck and getting the goal with a quick shot.
Jarnkrok made it 3-1 at 6:27 of the third period when he scored after a backhand pass from Morgan Geekie from behind the Sharks net.