TOM BRADY & GISELE HIT THE BEACH!

Tom Brady's back under center ... in a smoldering beach make out session with his supermodel wife, Gisele! 

TB12 loaded up the family and flew to Costa Rica for their annual offseason beach vacation -- where the couple proved they've still got that fire 10 years after they tied the knot! 

38-year-old Gisele showed off her legendary physique in a pretty tiny bikini -- while 41-year-old Tom didn't look too bad either! 

In fact, Brady looks like he's made some gains in the gym since those infamous dad-bod pics from last summer. 

Maybe avocado ice cream is worth looking into after all!? 

Of course, Tom is on a ticking clock when it comes to his vacation ... the New England Patriots report to training camp on July 25 -- only 9 days away. 

The Patriots regular season opener kicks off on Sept. 8 against the Pittsburgh Steelers -- Brady will be entering his 20th season in the league and gunning to play in his 10th Super Bowl!