What is the weather like in Kauai in August?

Typical August temperatures in Kauai run about 87/71°F (high/low), with very little rain.

When is the best time to visit Kauai?

April-May and September-October; summer for north-shore swimming. For the best value, aim for May and October.

Weather, crowds, and prices — and whether August is your month.

Quick answer · Good

Warm, dry, and busy; Na Pali boat conditions prime. Expect highs around 87°F, very little rain, peak crowds, and above average.

87/71°F

Typical high / low

Very little rain

Rain

Peak crowds

Crowds

Above average

Prices

Best overall: April-May and September-October; summer for north-shore swimming.
Best value: May and October.
Watch out for: Winter (November-March) closes north-shore swimming and brings the most rain.

Month	High/Low	Rain	Crowds	Prices
January	78/62°	Rainy season	Busy	Peak prices
February	78/61°	Regular showers	Busy	Peak prices
March	79/63°	Regular showers	Busy	Peak prices
April	81/65°	Occasional showers	Busy	Above average
May	83/67°	Occasional showers	Moderate	Good value
June	85/69°	Very little rain	Busy	Above average
July	86/71°	Very little rain	Peak crowds	Peak prices
August ←	87/71°	Very little rain	Peak crowds	Above average
September	86/70°	Occasional showers	Moderate	Good value
October	84/68°	Occasional showers	Moderate	Good value
November	81/66°	Regular showers	Moderate	Good value
December	78/63°	Rainy season	Peak crowds	Peak prices

Browse the Kauai guides — the full destination profile, all-inclusive resorts, family trips, and honeymoons — or skip the research entirely.

Want August priced for your exact dates?

Courtney Geisel, an independent travel advisor, prices real Kauai trips every week — free, because resorts pay her, not you.