I haven't been to Galera but I've been to several other places in the
Philippines over the past couple of years.  The best spots in my
experience have been Malapascua and Apo Island (off Dumaguete).  The
resort I stayed in in Dumaguete was great and I believe they also have a
place in Galera.  It's called the Atlantis.

November should give you fairly good viz most of the time and water
temps around 80 degrees F.

I'm assuming this is your first time to the Philippines so I'll also
offer this:  Avoid spending any time in Manila.  It's not a great city
for tourism.  I'd get in and off to my diving that same day if possible.

-Marco