Great source. I like the rainfall chart. What is your Dive Shop Called?Pearlman, don't know who you approached on Samui, but in general most dc's are open, so it's a bit strange that you didn't get a response. That's most certainly not how I conduct my business.
Having said that, have a look here for daily, first hand weather updates and predictions. Whatever you end up doing, hope you enjoy it!
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Sent from Tablet, please excuse brevity and typos...