During the hottest months of summer the average high temperature is about 31°C (89°F) and the overnight low is about 24°C (75°F) although temperatures can reach 35°C (95°F) on occasion so it’s a good idea to keep your fluids up.
During July and August you can expect the high to range between 24°C (75°F) and 28°C (83°F) with the pre dawn hours dropping to about 17°C (63°F). Rainfall varies depending on the time of year.
The summer months of January, February and March tend to be the time when we get most of our rain for the year. Although the average rainfall in each of these months is more than 400mm (15 ¾ in) it comes in short, sharp bursts with sunshine quickly following. That’s why you’ll see so many locals walking around in bare feet, shirts dry quickly, socks don’t.
The period between May and October usually has little rainfall, between 25mm (1 in) and 75mm (3 in) per month, enough to keep things green without ruining your holiday. Being in the tropics the humidity tends to be high but, as Port Douglas is on the ocean, the breeze negates much its effect on how hot it actually feels to you.
Ocean temperatures also vary with the seasons, ranging between 22°-25°C (72-77°F) in winter to between 29°-30°C (84-86°F) during the summer.