INTRO:
F Bb F Bb
F                                     Bb
That summer feeling That summer feeling
F                                  Bb
That summer feeling

Verse 1:
                  F                           Bb
When there's things to do not because you gotta
                F                        Bb
When you run for love not because you oughtta
               F                                   Bb
When you trust your friends with no reason not ta (nada)
Am                         C
The joy I name shall not be tamed
Gm                                                  Bb
And that summer feeling is gonna haunt you
C                         F     Bb     F     Bb
One day in your life.

              F                                         Bb
When the cool of the pond makes you drop down on it
             F                                         Bb
When the smell of the lawn makes you flop down on it
              F                               Bb
When the teenage car gets the cop down on it
    Am                        C
The time is here for one more year
             Gm                                 Bb
And that summer feeling is gonna haunt you
C                      F        Bb     F     Bb
One day in your life.

       F                        Bb
That summer feeling That summer feeling
       F                       Bb
That summer feeling

Just repeat these chords for the rest of the song. It follows the same basic structure.