Although there is a wet and a dry season in Tahaa (and the rest of the Tahitian Islands) the weather on Tahaa is tropical and generally sunny and warm, with just enough rain to keep the lush landscrapes alive and green.

If you're looking for good deals and emptier beaches, try travelling to Tahaa during the wet  or "off" season, which generally runs from November to April. During this time, you can expect very high humidity with brief and frequent storms. January is the rainiest of the months.During this time, tropical storms may occur, but the Tahitian Islands have not experienced a cyclone since the early 90s.

If you're travelling to the islands of Tahitit to scuba, you'll probably want to go in the dry or "high" season, when visibility is the best. The dry season runs from May to October and you can expect less rain, although occasional nighttime downpours are not uncommon. Of course, as this is the high season, you should expect to encounter more tourists and U.S. honeymooners who do not want risk Hurricane Season in the Caribbean. Due to tradewinds, July and August are the coolest times of the year (don't forget that sweater!) and also tend to be the most crowded.