Data from the NCDC (an agency of NOAA), confirm that global warming of the oceans did not cause Hurricane Sandy.
In fact, the most recent temperature measurements from the NCDC, which publishes global ocean temperature records, reveal that ocean temperatures have actually remained flat over last 15 years (thru September 2012), while CO2 levels increased
This chart shows global ocean temperatures for the 15-year period ending September 2012. Clearly, since late 1997, global warming of the oceans has not happened and thus can not be the cause of Hurricane Sandy.
Thanks to Kirk Myers for this link