The Great Barrier Reef has a relatively warm climate all year round.The winter season is from May to October and the summer season is from November to April. The ocean water is clear and the temperatures range from 25 degress Celsius being the lowest and 31 degress Celsius being the highest. Rainfall on the other hand is very different thought the year. It's at its highest point of rain from January to March it then slowly decress and makes a huge drop in June and it then drops intill August when it hits its lowest amount of rain. It then incress the amount of rain for the rest of the year.