Karratha weather by month & the best time to visit
Australia · beach resort · hot desert climate
The best time to visit Karratha is August — its sunniest month (Sunshine Score 100/100), with September and October close behind. Karratha averages about 3,645 hours of sunshine a year. Daytime highs around 25°C / 77°F and roughly 1 mm of rain in August.
When is the best time to visit Karratha?
For sunshine, the best time to visit Karratha is August, then September and October. The dullest month is February (84/100, 86 mm of rain). The full month-by-month picture is in the table below.
How sunny is Karratha?
Karratha is one of the sunniest places on Earth: about 3,645 hours of sunshine a year. August (100/100) is noticeably better than February (84). It ranks #23 of 118 destinations in Australia for annual sunshine, above the national median of 3,071 hours. Rain is strongly seasonal here: roughly 68% of the year's 335 mm falls in the three months around February.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 85 | 31° / 88°F | 27° / 81°F | 82 mm | 14 | 29° / 84°F |
| February | 84 | 31° / 88°F | 28° / 82°F | 86 mm | 14 | 31° / 88°F |
| March | 89 | 32° / 90°F | 28° / 82°F | 61 mm | 12 | 30° / 86°F |
| April | 97 | 31° / 88°F | 27° / 81°F | 17 mm | 10 | 28° / 82°F |
| May | 95 | 28° / 82°F | 23° / 73°F | 25 mm | 7 | 25° / 77°F |
| June | 94 | 25° / 77°F | 20° / 68°F | 32 mm | 6 | 23° / 73°F |
| July | 98 | 24° / 75°F | 19° / 66°F | 10 mm | 6 | 21° / 70°F |
| August | 100 | 25° / 77°F | 19° / 66°F | 1 mm | 8 | 23° / 73°F |
| September | 100 | 27° / 81°F | 21° / 70°F | 2 mm | 10 | 26° / 79°F |
| October | 100 | 29° / 84°F | 23° / 73°F | 1 mm | 12 | 27° / 81°F |
| November | 99 | 30° / 86°F | 25° / 77°F | 3 mm | 13 | 29° / 84°F |
| December | 97 | 31° / 88°F | 26° / 79°F | 15 mm | 14 | 31° / 88°F |
Sea temperature in Karratha by month
The sea off Karratha is warmest in February at around 31°C / 88°F, and coolest in July 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 Karratha compares month by month: Karratha vs Perth · Karratha vs Port Hedland · Karratha vs Broome · Karratha vs Newman · all comparisons
Karratha: questions and answers
What kind of destination is Karratha?
Karratha is a beach resort in Australia with a hot desert climate — the sea reaches 31°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Karratha get a year?
Karratha gets about 3,645 hours of sunshine a year, at its best around August.
When is the best time to visit Karratha?
The sunniest time to visit Karratha is August, when the Sunshine Score peaks at 100/100 (with September and October close behind). Expect daytime highs around 25°C / 77°F.
What is the least sunny month in Karratha?
February is the least sunny month in Karratha, scoring 84/100 with about 86 mm of rain.
What is the sea temperature in Karratha?
The sea in Karratha ranges from about 21°C (July) to 31°C (February). Month-by-month sea temperatures are on this page.
How strong is the sun in Karratha?
The typical midday UV index in Karratha peaks around 14 (extreme) in January, easing to about 6 (high) in June. Month-by-month midday UV values are in the UV column of the table on this page.
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