Poipu in September
Great time to visit
September offers slightly more breathing room as summer crowds disperse, but heat and humidity linger. Hurricane awareness is wise, though serious storms rarely affect this area directly.
Weather
September maintains summer heat but with slightly less crushing humidity as trade winds begin their gradual return. Afternoon storms remain frequent but often less severe than peak summer months. Hurricane season technically peaks, though direct hits on Kauai are rare.
31°C high24°C low15 rain days
Crowds & Cost
moderate crowds
~$220/day average
Events & Festivals
- •Aloha Festivals statewide
- •Labor Day weekend crowds
September Tips
- •Monitor weather closely - hurricane season is active
- •Crowds thin after Labor Day weekend
- •Ocean temperatures are still perfect for swimming
All Months
Poipu wins the weather lottery year-round, but some months definitely beat others. December through March brings the most visitors — and the highest prices. Hotel rates can double during Christmas week, and popular restaurants book solid weeks ahead. But the weather stays perfect, with temps in the low 80s and minimal rain.
April through June offers the sweet spot: great weather, fewer crowds, and shoulder season pricing. The trade winds keep things comfortable, and you'll actually find parking at popular beaches. September through November works similarly well, though you might catch the tail end of hurricane season — rare but worth noting.
Summer months (July-August) bring the calmest ocean conditions, perfect for snorkeling at Tunnels Beach or diving the Sheraton Caverns. But families pack the beaches, and everything feels more crowded. Winter swells make the north shore dramatic but keep most water activities focused on Poipu's protected south shore beaches.
Here's the thing: Poipu gets about 35 inches of rain annually while the north shore gets 400+ inches. Any time you visit, you're likely to stay dry.
Poipu Scores
Solo
6/10
Couples
9/10
Families
9/10
Adventure
6/10
Budget
3/10
Luxury
9/10
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