Personally, I think coconut water stinks.
But if you like it...have you tried other 'tropical' scents that use coconut a little more skillfully? I personally like Virgin Island Water by Creed and Bronze Goddess/Azuree Soleil Eau Fraiche by Estee Lauder/Tom Ford.
The coconut accord in these is subtle, fleshy and quite watery. Not exactly that cucumber-y vibe you perfectly describe in coconut water, but miles away from the 'fake' coconut of cheap pharmacy suntan lotion or some fig scents.