The high season is from June until October and the low season is from November until March. The months November/December and April/May are still very good for diving. The months January, February and March can be rainy with an occasional storm. Although the weather is not always good, we are operational every day. The water is still warm and it hardly ever rains all day. Temperatures range from 28 to 35 degrees Celsius (82 to 95 degrees Fahrenheit) on land and 26 to 29 degrees Celsius (79 to 84 degrees Fahrenheit) under water.
We advise a 3 mm full wetsuit as the most practical protection against jellyfish, sunburns and cold.
The wet season is usually less pronounced than in many other parts of Southeast Asia because of it’s location close to the equator and thus not really a serious concern in North Sulawesi. You are practically free to consider your own schedules, and those of others to perhaps avoid the holiday crowds. Strong cyclones and typhoons, which normally occur in higher latitudes, are absent in Indonesia, but afternoon thunderstorms are common.
Manado is located in the Central Indonesian Time Zone, eight hours ahead of GMT. There is very little change in the length of daylight hours from one season to the next; the difference between the longest day and the shortest day of the year is only forty-eight minutes.