I have a possibility to take a 10 day vacation in January 2011. (most probably between 30th Dec 2010 - 10th Jan 2011)
I am considering Sipadan since it's my favorite location.
However I have been there in October before and January is considered to be a rainy month with unstable weather conditions during which the visibility can be low.(this is due to internet resources)
Before making my final decision i would like to hear if any of the members of wetpixel had experience during January in Sipadan.