HOUSTON — Power combined with patience.

On Saturday night, that was the winning formula for the Yankees.

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Austin Wells hit their third home run of the game, a go-ahead shot to lead off the seventh inning, before they added insurance runs on a pair of bases-loaded walks to secure their eighth straight win, 8-3 over the Astros.

Trent Grisham and José Caballero also went deep while Ryan Weathers became the latest starter to turn in a quality outing as the Yankees (18-9) matched their longest winning streak from last season.

Over the first two games of this series, the Yankees have racked up 20 runs on 25 hits, seven home runs and 16 walks, ganging up on the brutal pitching staff of the Astros (10-18).

“Patience was the difference tonight,” manager Aaron Boone said after his lineup drew 10 walks. “Just really good at-bats, deep counts, really good takes in walking situations. That’s just a lot of outstanding at-bats in winning times.”

With the game tied 2-2 entering the seventh inning, the scuffling Wells finally delivered a big hit, homering off Kai-Wei Teng to put the Yankees ahead by a run.

The catcher, whose underlying metrics suggested he was having better at-bats than the surface numbers would indicate, later added an RBI single in the ninth — giving him two RBIs in the game after entering Saturday with two RBIs on the season — as he went 2-for-3 with a pair of walks.

“It’s good to find some grass and have it not get caught,” said Wells, who now has more walks (15) than strikeouts (14) on the season. “There’s always tweaks and different stuff you think about, but just trying to keep it simple — swing at strikes and take balls.”

After Wells’ homer, the Yankees mounted a rally to create some more breathing room. Caballero, who had a three-hit night, nearly thwarted it by making the second out when he was thrown out trying to steal third (with a lefty at the plate) for the second time in the game. But Ben Rice followed with a single against lefty Bennett Sousa, and Aaron Judge came back from an 0-2 count to draw a nine-pitch walk to load the bases.

Cody Bellinger then fought back from a 1-2 count to walk and force in a run before Jazz Chisholm Jr. drew a five-pitch walk to score another run for the 5-2 lead.

“It’s pretty dangerous, because we have a lot of guys that put at-bats together really [well],” Caballero said. “We just pass the baton and trust one another.”

Rice, who also had a three-hit night, came up just short of a grand slam in the eighth inning but settled for a sacrifice fly that made it 6-2.

Fresh off the paternity list, Weathers turned in a solid outing, giving up two runs over 5 ¹/₃ innings to continue a strong stretch of Yankees starting pitching.

The rotation has allowed two or fewer runs in each of its past eight starts and a total of seven earned runs in 54 innings during that stretch.

The Yankees tied the game 1-1 in the top of the third, when Grisham went the other way for a solo home run into the Crawford Boxes off right-hander Mike Burrows.

It could have been a two-run shot, except Caballero had just gotten thrown out trying to steal third base after successfully swiping second.

But Caballero made up for it by homering to the Crawford Boxes in his next at-bat — going deep for the second time in as many nights — to put the Yankees ahead 2-1.

The shortstop now has three straight multihit games.

“Just a gritty, tough player,” said Boone, who did not have an issue with Caballero getting thrown out twice because he did not want to temper his aggressiveness. “We’ll get that steal of third locked down and it would’ve been a Rickey [Henderson]-like night.”