I am struggling to find a database or free source of joint probability of significant wave height and period, i.e. wave scatter tables. Data for buoys are useful, however not available for regions like Africa.
For example, oceanor provides software based on hindcast (http://www.oceanor.no/Services/Worldwaves/) which is not available for free. The hindcast of NOAA could be used to process data from their ftp server, however it's a tedious task processing terabytes of historical data!
Is another source available to public?