First post here hehe .... 
Just go by Punggol road all the way north 2 the end.
http://www.streetdirectory.com.sg/singaporemap/singaporemap.php?ismap=1&starmode=0&x=35843.81569213&y=44391.147242593&star=1&iconlist=star1,35629.8345,43036.8359;&searchcompany=&searchunitno=&searchblock=70&searchstreetname=Punggol+Central&searchbuildingname=MRT%3A+Punggol+%28NE17%29&searchpostalcode=828868&searchmasterid=135487&searchbuildingid=5935&level=4?369,224
The beach is not wide, but very clean and lots of space around.
More for pinics, can fly kites, fishing etc. Quite a nice place to
go once in a while if u stay near. 