May and June
Go nowThe dry season begins, and the crowd has not arrived
Warm, dry, low humidity and the water at its clearest, with the cyclone season formally over. Prices are below the July peak and the islands are quiet, because the Australian and New Zealand school holidays have not started. The best value window of the year.
September and October
Go nowStill dry, still quiet, and warming again
The other end of the dry season: clear water, reliable weather and the school-holiday crowd gone home. Diving visibility is at its best. October is the last comfortable month before the wet season sets in, and it is often the cheapest good month.
July and August
Worth it, butThe best weather and the fullest islands
Dry, sunny and the coolest part of the year, which is why it is peak season: this is winter in Australia and New Zealand and the resorts fill with families. Book far ahead and pay the most. The weather is excellent; the price and the crowd are the cost.
April
Worth it, butThe wet season ending, and the risk falling
Rain eases through the month and humidity drops, with the islands green and prices still low. The cyclone season formally runs to the end of April, so the risk is reduced rather than gone. A reasonable gamble late in the month.
November
Worth it, butHot, humid, cheap, and the season opening
The wet season begins and the cyclone window opens, though November is historically among the quieter months within it. Warm sea, low prices and afternoon rain. Worth insuring properly rather than avoiding outright.
December and January
Think twicePeak humidity, peak rain, and holiday prices on top
Hot, very humid and wet, in the middle of the cyclone season, with Christmas and New Year pushing prices back up regardless. You pay high-season rates for wet-season weather, which is the worst trade on this calendar.
February and March
Think twiceThe heart of the cyclone season
The wettest and most humid months and statistically the most active part of the cyclone window. Boat transfers are cancelled in bad weather and some outer resorts close entirely. Prices are the lowest of the year, and this is why.