Portland State vs San Diego State Picks and Prediction for Saturday September 5 2026

Portland State travels to Southern California to face San Diego State on Saturday, September 5. Kickoff is scheduled for 9:30 PM ET at Snapdragon Stadium in San Diego, with USA Network carrying the game nationally. Portland State enters at 0-1 after opening its season with a competitive 31-24 loss to No. 6 UC Davis, while San Diego State will be making its 2026 debut. The Aztecs are currently favored by approximately 40.5 points. San Diego State should win comfortably, but asking the Aztecs to cover nearly six touchdowns against a Portland State team that has already played a competitive game makes the underdog interesting. Get into the action with our free college football picks.

Portland State Was Competitive in Its Opener

Portland State lost its first game, but the result shouldn't automatically be viewed negatively. The Vikings faced No. 6 UC Davis and remained competitive in a 31-24 defeat. Portland State was within one possession against a nationally regarded FCS opponent.

That experience should be useful before making the jump to San Diego State. The Vikings have already dealt with game speed, substitutions and fourth-quarter situations. San Diego State will be making its season debut. Portland State is also receiving around 40.5 points. That's a massive cushion for a team that showed enough offensive ability to score 24 against UC Davis.

San Diego State Begins Its Pac-12 Era

San Diego State enters 2026 after going 9-4 last season, including a 6-2 record in its final Mountain West campaign. The Aztecs now begin their new Pac-12 era and should have considerable advantages against Portland State at Snapdragon Stadium. 

San Diego State deserves to be a huge favorite. The Aztecs should have the better defense, greater overall depth and home-field advantage. But there is a substantial difference between winning comfortably and winning by 41 or more. Portland State reaching even 10-14 points means San Diego State may need to approach or exceed 50 points before covering.

Portland State vs San Diego State Picks and Prediction

Pick: Portland State +40.5

I'm taking Portland State +40.5. San Diego State should control the matchup, but the Vikings are getting almost six touchdowns after playing a competitive opener against a strong FCS opponent. Portland State doesn't need to seriously threaten the Aztecs to cash. A score such as San Diego State 42, Portland State 14 represents a dominant 28-point victory and still leaves Portland State with more than 12 points of spread protection. Even something like 45-10 remains comfortably inside +40.5. Take Portland State +40.5.

Pick: Under 55.5 if Available

For the total, my target would be Under 55.5 or better. San Diego State should have opportunities offensively, but asking the Aztecs to produce an enormous score in their season debut isn't necessary. Portland State's best chance to cover also involves preventing the game from becoming a track meet. Something around San Diego State 42, Portland State 10 produces 52 combined points while easily cashing the Portland State spread. Take Under 55.5 if that number becomes available.

Final Picks: Portland State +40.5 and Under 55.5 if available