Here’s what to look for in Saturday’s Week 18 game:

Game Implications

Saturday night’s primetime matchup between the 49ers and Seahawks carries massive postseason stakes, with the winner securing the NFC West title, the NFC’s No. 1 seed, a first-round bye, and home-field advantage. The loser will head into the postseason as a Wild Card team, facing a much tougher road despite double-digit wins. Both teams enter on six-game win streaks, tied for the longest active run in the NFC, with the Rams being the only team to beat either since early November. San Francisco has been the league’s hottest offense over that stretch, averaging the most points per game, while Seattle counters with the NFL’s second-ranked scoring defense. The 49ers won the Week 1 matchup 17–13 in Seattle and have taken seven of the last eight contests overall. Add in both teams entering undefeated in primetime this season, Saturday night sets up as a true winner-take-all showdown.

Game Experience: Faithful Appreciation Day — Arrive Early

Faithful Appreciation Day is set for this Saturday, and fans are encouraged to arrive early to take advantage of everything happening around the stadium. All fans in attendance will receive a “For the Faithful” rally towel upon entry, courtesy of SAP. Early arrivals can enjoy gameday activations and exclusive giveaways throughout the stadium, including 15 percent off Zenni glasses and a $5 Bud Light at Faithful Mile. Hundreds of surprise prizes will be gifted to fans thanks to our many partners. For more details visit 49ers.com. The festivities continue at halftime with the K9ers Corgi Cup final, marking the season-ending full-field showdown during the regular-season finale.

Rivalries Game — Wear Black

Saturday’s matchup will mark a historic moment for the 49ers as the team debuts its highly anticipated Rivalries uniform for the first time this season. The all-black look features a midnight black helmet with red striping and a gold-coated face mask, paired with bold red numbers outlined in gold and custom Saloon-style numbering. The uniform debut adds extra intensity to an already charged divisional matchup. Fans are encouraged to wear black, be loud, and help create a true home-field advantage. The goal is to turn Levi’s® Stadium into a sea of black from kickoff to the final whistle! More Rivalries details here.

Seahawks Week 18 Outlook

The Seattle Seahawks enter Week 18 at 13-3 with everything on the line, holding the NFC’s No. 1 seed and controlling their path to the NFC West title that comes with a first-round bye. The Seahawks haven’t finished as NFC’s top seed since 2014. Led by QB Sam Darnold, Seattle has won six straight games, pairing an efficient offense with the NFL’s second-ranked scoring defense, allowing just 18.1 points per game. While Darnold’s season numbers remain strong, his recent stretch has been more turnover-prone, notable given his Week 18 struggles last season in Minnesota that cost the Vikings the No. 1 seed. His 14 interceptions this season rank third-most in the NFL. Defensively, the Seahawks rely on pressure and takeaways, ranking among league leaders in sacks and interceptions anchored by Leonard Williams, Byron Murphy, and Ernest Jones IV. Offensively, they are fueled by WR Jaxon Smith-Njigba, the NFL’s leading receiver in yards, who presents a challenge for any secondary. Seattle will need to limit mistakes and match San Francisco’s offensive firepower during a hot streak for Purdy and crew, who have the home-field advantage. One slip could swing the NFC West race.

49ers Week 18 Outlook

The San Francisco 49ers come in at 12-4 riding their sixth consecutive win after a primetime victory over the Chicago Bears, highlighted by QB Brock Purdy‘s record-setting night that included five total touchdowns. Since returning from injury in Week 11, Purdy has powered the league’s highest-scoring offense, with the 49ers averaging 35.7 points per game while scoring 37 or more in each of the last three contests. The 49ers enter Week 18 undefeated in primetime this season and have punted just twice all month, the fewest of any team in the NFL. Health remains a storyline, with TE George Kittle and T Trent Williams monitoring injuries ahead of Saturday. The offense continues to revolve around RB Christian McCaffrey, who leads the NFL in touches and enters Week 18 on multiple historic record watches. Defensively, the 49ers have leaned on situational execution, setting up a strength-versus-weakness battle against Seattle’s vertical passing game. With a chance to snatch the NFC West and the No. 1 seed, San Francisco’s formula remains simple: capitalize on late-season momentum, manage health, and trust Primetime Purdy and its stars in a winner-take-all showdown.

Join the 49ers in their Week 18 game at Levi’s® Stadium on Saturday, January 3 against Seattle Seahawks. Get your tickets here.