Honeymoon suggestion late August/early September

Looking for HOT sun, beautiful beach, good snorkelling, culture, good food and nature. We don’t want to be holed up in a resort the whole time. We were considering Seychelles/Maldives but does not seem too easy to get out and explore? Want to avoid busy Europe and rainy season destinations. Flying from London, only have about 9-10 days, any ideas? Flexible budget