Hamilton Island weather by month & the best time to visit
Australia · beach resort · tropical — wet & dry seasons climate
The best time to visit Hamilton Island is September — its sunniest month (Sunshine Score 95/100), with August and July close behind. Hamilton Island averages about 3,060 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 14 mm of rain in September.
When is the best time to visit Hamilton Island?
For sunshine, the best time to visit Hamilton Island is September, then August and July. The dullest month is January (70/100, 219 mm of rain). The full month-by-month picture is in the table below.
How sunny is Hamilton Island?
Hamilton Island is one of the sunniest places on Earth: about 3,060 hours of sunshine a year. September (95/100) is noticeably better than January (70). It ranks #63 of 118 destinations in Australia for annual sunshine, below the national median of 3,071 hours. Rain is strongly seasonal here: roughly 61% of the year's 985 mm falls in the three months around February.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 70 | 30° / 86°F | 25° / 77°F | 219 mm | 12 | 30° / 86°F |
| February | 70 | 29° / 84°F | 25° / 77°F | 228 mm | 12 | 29° / 84°F |
| March | 70 | 29° / 84°F | 24° / 75°F | 155 mm | 11 | 28° / 82°F |
| April | 85 | 27° / 81°F | 23° / 73°F | 66 mm | 9 | 27° / 81°F |
| May | 91 | 26° / 79°F | 20° / 68°F | 36 mm | 7 | 24° / 75°F |
| June | 91 | 24° / 75°F | 18° / 64°F | 35 mm | 5 | 22° / 72°F |
| July | 93 | 23° / 73°F | 17° / 63°F | 24 mm | 6 | 22° / 72°F |
| August | 94 | 24° / 75°F | 17° / 63°F | 16 mm | 7 | 21° / 70°F |
| September | 95 | 26° / 79°F | 19° / 66°F | 14 mm | 9 | 23° / 73°F |
| October | 92 | 28° / 82°F | 21° / 70°F | 27 mm | 11 | 25° / 77°F |
| November | 88 | 29° / 84°F | 23° / 73°F | 50 mm | 12 | 27° / 81°F |
| December | 76 | 30° / 86°F | 24° / 75°F | 115 mm | 12 | 28° / 82°F |
Sea temperature in Hamilton Island by month
The sea off Hamilton Island is warmest in January at around 30°C / 86°F, and coolest in August at 21°C / 70°F. The water sits at a comfortable 21°C or warmer roughly all year round. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Hamilton Island compares month by month: Hamilton Island vs Townsville · Hamilton Island vs Cairns · Hamilton Island vs Mackay · Hamilton Island vs Rockhampton · all comparisons
Hamilton Island: questions and answers
What kind of destination is Hamilton Island?
Hamilton Island is a beach resort in Australia with a tropical — wet & dry seasons climate — the sea reaches 30°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Hamilton Island get a year?
Hamilton Island gets about 3,060 hours of sunshine a year, at its best around September.
When is the best time to visit Hamilton Island?
The sunniest time to visit Hamilton Island is September, when the Sunshine Score peaks at 95/100 (with August and July close behind). Expect daytime highs around 26°C / 79°F.
What is the least sunny month in Hamilton Island?
January is the least sunny month in Hamilton Island, scoring 70/100 with about 219 mm of rain.
What is the sea temperature in Hamilton Island?
The sea in Hamilton Island ranges from about 21°C (August) to 30°C (January). Month-by-month sea temperatures are on this page.
How strong is the sun in Hamilton Island?
The typical midday UV index in Hamilton Island peaks around 12 (extreme) in January, easing to about 5 (moderate) in June. Month-by-month midday UV values are in the UV column of the table on this page.
Put the Hamilton Island sunshine badge on your site
A compact badge showing Hamilton Island's sunshine at a glance — free to embed under CC BY 4.0. Paste this wherever you'd like it to appear:
Live preview — this is exactly what your readers see: