I saw other people posted the chords already, but both in the wrong key and they 
didn't include the key changes which make the song so exciting to the listener.



G                            C             D7
Here comes summer, school is out, oh happy days,
           G                      C            D7
Here comes summer, gonna grab my girl and run away
G                          C            D7
If she's willing, we'll go steady right away,
            G                      C     D7     G
Oh let the sun shine bright on my happy summer home.


G                        C                D7
Here comes summer almost June, the sun is bright.      
           G             C             D7
Here comes summer, gonna see her every night.      
         G                    C                D7
It's the greatest, lots more time to hold her tight.
            G                      C     D7     G
Oh, let the sun shine bright on my happy summer home.
         
C
School is not so bad, but the summer is better              
   G
It gives me more time to see my girl.       
C
Walk through the park beneath the shiny moon,     
    A                      D7
Oh, when we kiss she makes my hair curl.
 
D#7
          G#                C#                D#7
Here comes summer, feel her lips so close to mine.      
            G#               C#                  D#7
Here comes summer, when we meet her eyes both shine.     
          G#                    C#              D#7
It's the greatest, let's have summer all the time.    
             G#                    C#     D#7   
Oh, let the sun shine bright on my happy summer home.

E7

A          A                 D             E7
Here comes summer, school is out, oh happy days,
           A                      D            E7
here comes summer, gonna grab my girl and run away.              
         A                 D            E7
If she's willing, we'll go steady right away,                              
             A                      D     E7     
Oh, let the sun shine bright on my happy summer home. 

D#

A#                        D#                F7
Here comes summer almost June, the sun is bright.      
           A#             D#             F7
Here comes summer, gonna see her every night.      
         A#                    D#                F7
It's the greatest, lots more time to hold her tight.    
            A#                      D#     F7     A#
Oh, let the sun shine bright on my happy summer home.