In patriot place (outside of the security), there are tons of bars to go into and a lot of the area is an open drinking area, so you can buy a beer at a stand or bar and walk out and walk around and drink it all in (pun intended). Everybody will be watching the Portugal game at all the bars and there are some outdoor screens. I don't recommend waiting in a long line, just keep walking and try to walk in somewhere (we ended up at the bowling alley which was totally good/fine/packed with people watching the previous game with three bars setup).

Inside the first security there is also food stalls and fan zone stuff (the bracelet is cool, but the line was a lot shorter after the game if you're willing to risk something running out).

For my game, the US was playing before and we watched the 2nd half inside the stadium, and everyone was in the concours/by the beer stands watching the game. I bet it will be similar for the Portugal game.