Planning for the weather is a good way to make your trip to Islas Secas relaxing and enjoyable, especially when you're splurging. The hottest months are usually April and March with an average temp of 82°F, while the coldest months are January and December with an average of 77°F. The rainiest months in Islas Secas are October, August, September, and June, with each month seeing an average of 20 inches of rainfall.