2440 Hoonani Rd, Koloa, Hawaii, 96756, United States
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Sheraton Kauai Resort: Month-by-Month Weather Guide
Trying to decide what weather to expect at Sheraton Kauai Resort? This in-depth guide breaks down Poipu’s month-by-month conditions, rainy and dry seasons, south-shore sunshine patterns, ocean considerations, and whale-watching timing—so you can plan beach days, excursions, and packing with confidence. Whether you are visiting during the drier summer months, the winter rainy season, or the value-focused spring and fall windows, this breakdown shows what each month is likely to feel like in Koloa.
Planning your stay guide
Wondering what the weather is like by month at Sheraton Kauai Resort? This guide breaks down what each month typically feels like on Poipu Beach, Kauai's sunny south shore—including average temperatures in °F, humidity, rain chances, and what that means for beach days, snorkeling, whale watching, and exploring the island's spectacular natural attractions.
Quick takeaway:
Sheraton Kauai Resort enjoys pleasant, tropical weather year-round on Poipu Beach. Most days land roughly between 73–85°F for daytime highs. The most consistently dry and comfortable stretch is usually April–September (often around 78–85°F highs with less rain), while November–March brings slightly cooler temps (often around 73–78°F) with higher rain chances—though Poipu's south shore location keeps it sunnier than Kauai's north coast.
Poipu Beach note: As one of Hawaii's sunniest spots, this south shore location gets less rain than much of Kauai, and ocean breezes keep afternoons comfortable even during warmer months.
Sheraton Kauai Resort enjoys pleasant, tropical weather year-round on Poipu Beach. Most days land roughly between 73–85°F for daytime highs. The most consistently dry and comfortable stretch is usually April–September (often around 78–85°F highs with less rain), while November–March brings slightly cooler temps (often around 73–78°F) with higher rain chances—though Poipu's south shore location keeps it sunnier than Kauai's north coast.
Poipu Beach note: As one of Hawaii's sunniest spots, this south shore location gets less rain than much of Kauai, and ocean breezes keep afternoons comfortable even during warmer months.
Driest months: typically May–Sep
Warmest highs: ~83–85°F (Jul–Sep)
Cooler, wetter: Dec–Feb (~73–78°F)
Whale season: Dec–Apr (peak Jan–Mar)
Use the month-by-month cards below to choose the best timing for your trip style: sunny beach weather, snorkeling conditions, whale watching, or exploring Kauai's trails and waterfalls—without guessing.
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Explore the resort
Continue planning your stay at Sheraton Kauai Resort with these quick guides. Explore guest room options and oceanfront views, browse RumFire Poipu Beach and Lava's on Poipu Beach dining, preview pools and beach activities, and learn about the spa, wedding venues, and nearby Poipu attractions—so you can book the best experience for your all-ages Hawaii vacation on Kauai's sunny south shore.
Sheraton Kauai Resort Weather by Month (Quick Overview)
This quick chart helps you compare months at a glance for Sheraton Kauai Resort on Poipu Beach. Use it to plan for sunshine, rainfall, and the easiest conditions for beach time, snorkeling, whale watching, and exploring Kauai's trails and canyons.
| Month | Typical temps (°F) | Rain & conditions | Best for |
|---|---|---|---|
| Jan | High ~77–78°F • Low ~65–68°F | Cooler season; more rain possible | Whale watching peak + fewer crowds |
| Feb | High ~77–78°F • Low ~65–68°F | Similar to Jan; whales still active | Whale season + comfortable temps |
| Mar | High ~78–79°F • Low ~66–69°F | Rain begins to decrease | Late whale watching + spring hiking |
| Apr | High ~79–80°F • Low ~67–70°F | Drier pattern emerging | Great balance of sun + lower crowds |
| May | High ~81–82°F • Low ~69–72°F | Typically drier; excellent sunshine | Beach + snorkeling prime time |
| Jun | High ~83–84°F • Low ~71–74°F | Dry season; calm ocean conditions | Family beach vacations + water sports |
| Jul | High ~84–85°F • Low ~72–75°F | Peak summer warmth; very dry | Long beach days + sunset dining |
| Aug | High ~85°F • Low ~73–75°F | Warmest month; still quite dry | Peak beach season + island exploring |
| Sep | High ~84–85°F • Low ~72–75°F | Still warm and mostly dry | Fewer crowds + excellent beach weather |
| Oct | High ~83–84°F • Low ~71–74°F | Rain chances start to increase | Shoulder season value + good weather |
| Nov | High ~81–82°F • Low ~69–72°F | More rain; cooler evenings | Quieter weeks + green landscapes |
| Dec | High ~78–79°F • Low ~66–69°F | Wetter season begins; whales return | Holiday trips + whale watching starts |
Month-by-Month Weather at Sheraton Kauai Resort
These month cards translate the weather into real planning for Sheraton Kauai Resort: what it feels like on Poipu Beach, how to time snorkeling and whale watching, and what to expect for exploring Kauai's famous trails, waterfalls, and scenic coastlines.
Weather by month
January
Cooler and wetter for Kauai, but Poipu Beach stays relatively sunny. Peak whale watching season with humpbacks visible from shore—excellent for ocean watching at RumFire Poipu Beach.
Typical tempsHigh ~77–78°F • Low ~65–68°F
Ocean conditionsCan be rougher; check daily for snorkeling
RainfallHigher chance of showers
Best forWhale watching + comfortable hiking temps
Weather by month
February
Similar conditions to January with continued whale activity. Pleasant temperatures for exploring Waimea Canyon and inland attractions when beaches have rougher surf.
Typical tempsHigh ~77–78°F • Low ~65–68°F
Whale watchingStill excellent through the month
Beach timeGood but may need backup plans
Best forNature tours + indoor/outdoor balance
Weather by month
March
Transition month as rain begins to decrease and ocean conditions improve. Late whale watching season—you may still spot humpbacks early in the month.
Typical tempsHigh ~78–79°F • Low ~66–69°F
Ocean conditionsImproving for snorkeling
RainfallStarting to taper off
Best forSpring hiking + waterfall tours
Weather by month
April
Drier weather emerges with comfortable temperatures—excellent for both beach time and exploring Kauai's famous trails like Kalalau or Sleeping Giant.
Typical tempsHigh ~79–80°F • Low ~67–70°F
Beach conditionsImproving steadily
CrowdsLighter than peak winter
Best forBalanced sun + outdoor adventures
Weather by month
May
Dry season arrives with excellent sunshine and calm ocean conditions—ideal for snorkeling at Poipu Beach and dining oceanfront at Lava's on Poipu Beach.
Typical tempsHigh ~81–82°F • Low ~69–72°F
Ocean clarityExcellent for snorkeling + sea turtles
RainfallTypically low
Best forBeach-focused vacations + water activities
Weather by month
June
Peak dry season continues with warm, sunny days—perfect for families wanting consistent beach weather and calm swimming conditions at the resort's beachfront.
Typical tempsHigh ~83–84°F • Low ~71–74°F
Ocean conditionsCalm and clear—great for kids
EveningsComfortably warm; ideal for sunset dining
Best forFamily beach trips + water sports
Weather by month
July
Peak summer warmth with very dry conditions—long sunny days for beach time, poolside relaxation, and evening experiences at RumFire Poipu Beach with ocean views.
Typical tempsHigh ~84–85°F • Low ~72–75°F
UV levelsHigh; sun protection essential
RainfallVery low typically
Best forClassic summer beach vacation
Weather by month
August
Warmest month of the year but ocean breezes at Poipu Beach keep it comfortable—excellent for extended beach days, snorkeling, and exploring the island's diverse landscapes.
Typical tempsHigh ~85°F • Low ~73–75°F
Ocean tempsWarmest of the year (~80°F)
ConditionsStill very dry; calm seas
Best forPeak beach season + island adventures
Weather by month
September
Still warm and mostly dry with fewer visitors—one of Kauai's best-kept secrets for excellent beach weather without peak-season crowds.
Typical tempsHigh ~84–85°F • Low ~72–75°F
CrowdsNoticeably lighter than summer
Ocean conditionsStill excellent for swimming
Best forQuieter beach escapes + exploring
Weather by month
October
Transition month as rain chances begin to increase—still plenty of sunshine on Poipu's south shore, with good shoulder-season value and comfortable temperatures.
Typical tempsHigh ~83–84°F • Low ~71–74°F
RainfallGradually increasing
Beach timeStill very good with flexibility
Best forValue trips + mixed activities
Weather by month
November
More rain likely as wetter season arrives, but Poipu Beach remains one of Kauai's sunnier spots—landscapes turn greener, making waterfall hikes especially scenic.
Typical tempsHigh ~81–82°F • Low ~69–72°F
RainfallHigher but often in brief showers
SceneryLush, green landscapes
Best forQuieter weeks + nature photography
Weather by month
December
Cooler and wetter overall, but holiday atmosphere makes it special—first humpback whales begin arriving, and comfortable temps are perfect for exploring beyond the beach.
Typical tempsHigh ~78–79°F • Low ~66–69°F
Whale watchingSeason begins (peaks Jan–Mar)
RainfallHigher; pack rain gear
Best forHoliday getaways + mixed activities
What to Pack for Sheraton Kauai Resort (By Weather)
Packing for Sheraton Kauai Resort on Poipu Beach means preparing for tropical sun, ocean breezes, and the possibility of brief rain showers. Kauai's weather is generally mild year-round, but what you bring depends on when you visit. Rule of thumb: May–September is warmest and driest, while December–March is cooler with more rain chances—though Poipu stays sunnier than other parts of the island.
Dry season months (often ~81–85°F highs, May–Sep)
- Reef-safe sunscreen (Hawaii law requires it) + sun hat + sunglasses
- Lightweight beach clothing + swimwear (multiple suits recommended)
- Water shoes for snorkeling and reef walking
- Light cover-up for dining at RumFire Poipu Beach or Lava's on Poipu Beach
- Daypack for hiking trails (water bottle essential)
Wetter, cooler months (often ~77–82°F highs, Nov–Apr)
- Light rain jacket or packable waterproof layer
- Long sleeves for cooler evenings (especially Jan–Feb)
- Binoculars for whale watching from the beach (Dec–Apr)
- Quick-dry clothing for changeable conditions
- Closed-toe water shoes for rougher ocean days
- Same sun protection (UV stays strong year-round)
FAQ: Sheraton Kauai Resort Weather by Month
What month has the best weather at Sheraton Kauai Resort?
Many travelers prefer May through September when Poipu Beach experiences its driest, sunniest weather with daytime highs around 81–85°F. This period offers the most consistent conditions for beach time, snorkeling, and water activities with calm ocean conditions. September is particularly appealing for those wanting excellent weather with fewer crowds.
When is whale watching season at Sheraton Kauai Resort?
Humpback whales visit Hawaiian waters from approximately December through April, with peak activity typically in January, February, and March. You can often spot whales right from the beach at Sheraton Kauai Resort, especially during morning hours, or enjoy views from RumFire Poipu Beach while dining oceanfront.
Does it rain every day during Kauai's wet season?
Not typically. While November through March sees more rainfall, Poipu Beach on Kauai's south shore is one of the island's sunniest and driest locations. Rain often comes in brief showers rather than all-day events, and you'll still experience plenty of sunshine—just pack a light rain jacket and keep outdoor plans flexible.
Is it too cool to swim during winter months at Sheraton Kauai Resort?
Not at all. Ocean temperatures in Poipu stay comfortable year-round, typically ranging from about 75–77°F in winter months to 78–80°F in summer. Air temperatures in winter (December–February) average around 77–78°F for daytime highs—very pleasant for beach time, though ocean conditions can be rougher with larger surf during winter months.
How does Poipu Beach weather compare to other parts of Kauai?
Poipu Beach and Kauai's south shore typically receive much less rainfall than the island's north shore (Princeville/Hanalei area) and interior mountains. While places like Mount Waialeale receive hundreds of inches of rain annually, Poipu averages around 35–40 inches per year—making it one of Hawaii's sunniest resort destinations. This south shore location also tends to have calmer ocean conditions, especially during summer months.
What's the best time for snorkeling at Sheraton Kauai Resort?
May through September typically offers the calmest, clearest ocean conditions for snorkeling at Poipu Beach, with excellent visibility and calm waters. You can often see green sea turtles (honu) right from the resort's beachfront. Winter months (November–March) can have rougher surf and lower visibility, though early morning hours often provide calmer windows even during wetter months.
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