The High Season on Bohol's beaches, is considered from December till March. During this time the weather in Bohol is usually dry with only very few rain showers from time to time.
The temperature during this high season ranges from 28°C to 32°C in the daytime and drops to about 25°C in the night.
Starting in March until July it gets hot in Bohol, with temperatures rising up to 38°C in the day time. In the same time however it starts raining again from time to time but the rain cools the air only for a very short period of time.
The Typhoon Season in the Philippines lasts from June till December. Luckily, Bohol is located a little south of the infamous "Typhoon Street" and gets so rarely hit by the Typhoons. There might be some heavy rain in Bohol however, when there is a Typhoon somewhere near in in Philippines.
August to November can be called the "wet season" or Rainy Season and might not be the best time time to visit Bohol Island since its raining quite a lot.
The Best Time to Travel
The best time to travel to Bohol is from December until April but even after this, it's still nice since the beaches are not so full and the prices for hotels come down a little.