I am Saudi and got my Schengen visa and i'd like to visit Bora Bora "French Polynesia" for a week or less.
Do I need a certain visa to go there or would the Schengen visa be ok?
(Note: I applied for the Schengen from the Swiss Embassy.)
You are not able to use your Schengen Visa to enter Bora Bora. Instead you should apply for "visa for French Overseas collectivities". You must apply this visa directly to French Embassy.
For detail, please take a look at this article from French Embassy.