Best time to visit Hamilton Island

The best time to visit Hamilton Island is during August, September and October, but anytime between June and November is good – you can expect mild to warm temperatures, and relatively dry, sunny weather.

Hamilton Island weather

Hamilton Island experiences a tropical climate of hot, wet summers (from December to March), mild to warm, relatively dry winters (from June to August), and a warm spring (September to November) and autumn (March to May).

The wet 'green' season from January to March is generally hot, wet and humid. Tropical rain showers last from December through May.

You can expect some rainfall throughout the year in Hamilton Island.

What is the best month to visit Hamilton Island?
July, August, September and October are considered the best months to visit Hamilton Island – the weather is pleasantly warm with sunny, clear blue skies and little to no rainfall.

However, anytime between May and November is good, despite the cooler sea water temperatures in July and August.

When is the best time for sailing in Hamilton Island?
While you can sail year-round from Hamilton Island, August to November is considered the most settled time of year for sailing in the Whitsundays.

The Whitsunday Islands are influenced by the South Pacific trade winds and consequently experience south-east and east winds, with the exception from November to January, when it’s usual to get wind from the northeast.

Which is the hottest month in Hamilton Island?
The hottest month in Hamilton Island is normally January, with an average high of 30°C (86°F), with high heat and humidity, and a low of 25°C (77°F).

However, on the warmest days of the month, the temperature may climb to around 34°C (93°F).

The hot season lasts from November through March, with an average daily high temperature above 28°C (82°F).

Which is the coldest month in Hamilton Island?
The coldest month in Hamilton Island is normally July, with an average high of 21°C (69°F) and a low of 18°C (64°F).

The cool season lasts from early-June to late-August, with an average daily high temperature below 23°C (73°F).

When is it sunniest in Hamilton Island?
The sunniest month in Hamilton Island is usually September with nine hours of bright sunshine per day; that's around 78% of daylight hours.

On average, the sky is clear, mostly clear, or partly cloudy 83% of the time during September.

What is the driest month in Hamilton Island?
September has the least rainfall with an average of 9mm (‹1in), distributed across three days.

The drier season lasts from April through November.

Which month has the most rain in Hamilton Island?
The month with the most wet days in Hamilton Island is January, with an average of 260mm (10in) of rainfall, distributed across 13 days.

The rainy season normally lasts from December through March, with a greater than 24% chance of a given day being a wet day.

When is the sea warmest in Hamilton Island?
The sea is usually at its warmest in Hamilton Island in February, when the sea temperature averages 28°C (82°F), which is pleasant for swimming.

From December to early-April, the sea has an average temperature above 27°C (80°F), which is warm enough for swimming.

Cooler sea water temperatures last from mid-June to mid-September, with an average temperature below 23°C (73°F).

During July and August the average water temperature is 22°C (71°F), which is barely acceptable for swimming.

What are the windiest months in Hamilton Island?
March is the windiest month, with an average hourly wind speed of 26 kilometres per hour (16 mph; 14 knots).

The windy time of year lasts from late-January to mid-June, with average wind speeds of more than 24 kilometres per hour (15 mph; 13 knots).

The calmer time of year lasts from mid-June to late-January. The calmest month in Hamilton Island is September, with an average hourly wind speed of 22 kilometres per hour (14 mph; 12 knots)..

The predominant wind direction in the Whitsundays is from the east throughout the year.

Is there a risk of a tropical storm in Hamilton Island?
The risk of a tropical storm in Hamilton Island is greatest between January and March, with March having a risk probability of 3.8%.

The region is prone to tropical cyclones, which usually form between November and May.

Queensland has an excellent cyclone warning system that provides plenty of advance notice of an impending cyclone.

Are there marine stingers at Hamilton Island?
The waters of tropical Queensland – including the Whitsundays and Hamilton Island – are home to marine stingers and jellyfish.

The peak stinger risk season is from October to May. Most accredited Whitsunday tour operators offer protective ‘stinger suits’ to all customers at little or no cost, so you can still enjoy swimming and snorkelling.

If you do get stung do not rub the sting area instead, apply vinegar immediately and seek medical attention urgently. Dial 000 for an ambulance.

Hamilton Island Weather Averages

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average daily max (°C)
30 30 29 27 25 22 21 23 25 27 29 30
Average daily min (°C)
25 25 24 23 21 19 18 18 20 22 23 24
Average daily sunshine (hrs)
9 7 7 7 7 7 7 9 9 10 9 9
Average daily daylight (hrs)
13 13 12 11 11 11 11 11 12 13 13 13
Comfort level
High heat & humidity icon High heat & humidity icon Moderately hot icon Moderately hot icon Low heat & humidity icon Low heat & humidity icon Low heat & humidity icon Low heat & humidity icon Low heat & humidity icon Moderately hot icon Moderately hot icon High heat & humidity icon
Average relative humidity (%)
79 83 82 81 83 82 79 79 74 74 76 78
UV Index (max)
11+ 11+ 11+ 10 7 6 6 8 10 11+ 11+ 11+
Average days of rainfall (≥1mm)
13 13 13 12 11 7 5 3 3 3 5 7
Average monthly rainfall (mm)
260 254 167 159 95 32 28 14 9 13 25 104
Average wind speed (km/h)
23 24 26 26 25 24 23 23 22 22 23 24
Average sea temperature (°C)
28 28 28 26 25 23 22 22 23 25 26 28
Hamilton Island, Queensland

Holiday seasons

High season: Typically, school and public holidays from late-December to late- January; Easter; from late-June to early-July; and from late-September to early-October. Winter, from June through August, is also popular.

Low season: Anytime outside the main school and public holiday periods.

Hamilton Island weather by month

Note: Meteorological data for Hamilton Island is based on weather statistics gathered for the 30-year period 1991 to 2020, and is sourced from the Bureau of Meteorology (BoM) at the closest weather station, Hamilton Island Airport (HTI), also known as Great Barrier Reef Airport. Additional climate data is sourced from the World Meteorological Organization (WMO).

Advice on the best time to visit a particular destination is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.

More about Hamilton Island…

More about the Whitsundays…

Latest update: Best time to visit Hamilton Island: 28 September, 2023

Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.