Kailua-Kona weather by month & the best time to visit
United States · beach resort · tropical — wet & dry seasons climate
The best time to visit Kailua-Kona is June — its sunniest month (Sunshine Score 90/100), with September and July close behind. Kailua-Kona averages about 3,315 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 50 mm of rain in June.
When is the best time to visit Kailua-Kona?
For sunshine, the best time to visit Kailua-Kona is June, then September and July. The dullest month is March (74/100, 134 mm of rain). The full month-by-month picture is in the table below.
How sunny is Kailua-Kona?
Kailua-Kona is one of the sunniest places on Earth: about 3,315 hours of sunshine a year. June (90/100) is noticeably better than March (74). It ranks #47 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 938 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 84 | 25° / 77°F | 24° / 75°F | 81 mm | 7 | 26° / 79°F |
| February | 83 | 25° / 77°F | 24° / 75°F | 88 mm | 9 | 26° / 79°F |
| March | 74 | 25° / 77°F | 24° / 75°F | 134 mm | 10 | 26° / 79°F |
| April | 83 | 25° / 77°F | 24° / 75°F | 85 mm | 11 | 25° / 77°F |
| May | 87 | 26° / 79°F | 24° / 75°F | 66 mm | 11 | 26° / 79°F |
| June | 90 | 26° / 79°F | 25° / 77°F | 50 mm | 11 | 27° / 81°F |
| July | 89 | 27° / 81°F | 26° / 79°F | 53 mm | 12 | 27° / 81°F |
| August | 85 | 27° / 81°F | 26° / 79°F | 74 mm | 12 | 28° / 82°F |
| September | 90 | 27° / 81°F | 26° / 79°F | 49 mm | 11 | 28° / 82°F |
| October | 87 | 27° / 81°F | 26° / 79°F | 67 mm | 10 | 28° / 82°F |
| November | 82 | 27° / 81°F | 26° / 79°F | 93 mm | 8 | 27° / 81°F |
| December | 81 | 26° / 79°F | 25° / 77°F | 98 mm | 7 | 26° / 79°F |
Sea temperature in Kailua-Kona by month
The sea off Kailua-Kona is warmest in August at around 28°C / 82°F, and coolest in April at 25°C / 77°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
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Head-to-head
How Kailua-Kona compares month by month: Kailua-Kona vs Honolulu · Kailua-Kona vs Kahului · Kailua-Kona vs Lihue, Kauai · Kailua-Kona vs Hilo · all comparisons
Kailua-Kona: questions and answers
What kind of destination is Kailua-Kona?
Kailua-Kona is a beach resort in United States with a tropical — wet & dry seasons climate — the sea reaches 28°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Kailua-Kona get a year?
Kailua-Kona gets about 3,315 hours of sunshine a year, at its best around June.
When is the best time to visit Kailua-Kona?
The sunniest time to visit Kailua-Kona is June, when the Sunshine Score peaks at 90/100 (with September and July close behind). Expect daytime highs around 26°C / 79°F.
What is the least sunny month in Kailua-Kona?
March is the least sunny month in Kailua-Kona, scoring 74/100 with about 134 mm of rain.
What is the sea temperature in Kailua-Kona?
The sea in Kailua-Kona ranges from about 25°C (April) to 28°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Kailua-Kona?
The typical midday UV index in Kailua-Kona peaks around 12 (extreme) in July, easing to about 7 (high) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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