Planning for the weather is an important factor for making your trip to Nosy Boraha a success, especially when you're splurging. The hottest months are usually January and February with an average temp of 79°F, while the coldest months are July and August with an average of 71°F. The rainiest months in Nosy Boraha are March, January, February, and April, with each month seeing an average of 14 inches of rainfall.