Aston Islander on the Beach forecast: weather, water & waves
Kapaʻa, HI · Kauaʻi, United States · 22.053, -159.329
Updated : very low seaweed, beach grade A-, sea 78°F.
Veabird's call
Monday hits A- with little seaweed while Saturday drops to B+ in 62 percent rain.
January grades B+ and seaweed is usually lowest in December.
Grades from Veabird's beach forecast; wording by AI (Muse Spark), checked against the forecast. Updated Nov 13, 01:00 UTC.
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Questions about Aston Islander on the Beach
Does Aston Islander on the Beach get sargassum (seaweed)?
No. Atlantic sargassum does not reach Hawaii.
How warm is the water at Aston Islander on the Beach?
About 80°F in November. The sea is warmest in September and October (about 81°F) and coolest in February, March and April (about 76°F).
When is the best time to visit Aston Islander on the Beach?
For warm water and dry weather, aim for November through January. November is usually the quietest of those, with about 23 rainy days and a sea near 80°F.
When is hurricane season at Aston Islander on the Beach, and how often do storms hit?
The central Pacific hurricane season runs June through November. A tropical storm passed within 86 miles of Aston Islander on the Beach in 4 of the 55 seasons from 1971 to 2025, and a hurricane within 58 miles in 3. The riskiest stretch is around July 23, when the chance of a storm passing in any one week is about 1% or less; across all of August it is about 3%.
What guests say about Aston Islander On The Beach
Guests like Great location · Comfortable stay
Watch for Cleanliness issues · Unprofessional service
- Cleanliness
7.0 - Service
8.5 - Location
9.0 - Room Quality
7.5 - Amenities
7.5 - Value for Money
8.5 - Food and Beverage
8.0 - Overall Experience
8.0
Read all 940 reviews · Compare on Expedia
Scores and reviews come from guests who stayed, through LiteAPI (Nuitée). The likes, watch-fors and category scores are an AI summary of those reviews. Partner links: Veabird may earn a commission.
Sargassum season at Aston Islander on the Beach
Aston Islander on the Beach sits outside the reach of the Atlantic sargassum belt; seaweed landings are rare in any month.
Kauaʻi month by month
Typical weather, water temperature, seaweed and crowds for every month: the best time to visit Kauaʻi.
Weather & water by month at Aston Islander on the Beach
Average highs run from about 76°F in February to 82°F in August and September. The sea is warmest in September and October (about 81°F) and coolest in February, March and April (about 76°F). January is usually the driest, with about 15 rainy days; July is the wettest, with about 29 rainy days.
| Month | Avg high | Sea | Rainy days |
|---|---|---|---|
| Jan | 77°F | 77°F | 15 |
| Feb | 76°F | 76°F | 18 |
| Mar | 77°F | 76°F | 23 |
| Apr | 77°F | 76°F | 26 |
| May | 78°F | 78°F | 28 |
| Jun | 80°F | 79°F | 26 |
| Jul | 81°F | 80°F | 29 |
| Aug | 82°F | 80°F | 27 |
| Sep | 82°F | 81°F | 25 |
| Oct | 81°F | 81°F | 24 |
| Nov | 79°F | 80°F | 23 |
| Dec | 78°F | 79°F | 20 |
Monthly averages from 6 years of ERA5 reanalysis (Open-Meteo) for this area's 0.5° grid cell; rainy days have at least 1 mm (0.04 in). Any given year can differ.
Cleanup & barriers
- Offshore barriers
- Not needed: Atlantic sargassum does not reach Hawaii.
- Public cleanup
- Volunteer groups (Sustainable Coastlines Hawaiʻi, Hawaiʻi Wildlife Fund) clear ocean plastic, heaviest on windward shores.
- Resort crews
- Resort crews groom beaches daily.
- Typical clearing time
- n/a
Safety notes
Domestic travel (no State Dept advisory)
- Winter swells (Nov–Mar) make north- and west-facing shores dangerous; summer swells hit south shores.
- Shorebreak and rip currents cause most visitor injuries: swim at lifeguarded beaches.
- Hawaiʻi bans sunscreens with oxybenzone and octinoxate.
- Stay 50 ft from monk seals and 10 ft from sea turtles.
- North shore (Hanalei, Princeville) is calm in summer and dangerous in winter; Poʻipū is the reverse.
- Flash floods close the Kūhiō Highway and Nā Pali trails after heavy rain.
Check official advisories and local flags before swimming. Decomposing sargassum releases hydrogen sulfide; avoid heavy piles.
Things to do near Kapaʻa, HI
- Nā Pali Coast (boat or Kalalau Trail)
- Waimea Canyon
- Hanalei Bay
- Poʻipū beaches & Spouting Horn
- Wailua River kayak
Fly in for the best beach days
Suggested dates are a week in December. Change them to match the live forecast above.
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Nearest airports
- Līhuʻe (Kauaʻi) (LIH), ~9 km
Nearby resorts
- Plantation Hale Suites Kapaʻa, HI · 1 km
- Sheraton Kauai Coconut Beach Resort Kapaʻa, HI · 1 km
- Waipouli Beach Resort & Spa Kauai by Outrigger Kapaʻa, HI · 1 km
- Hilton Garden Inn Kauai Wailua Bay Kapaʻa, HI · 1 km
- Kaha Lani Resort Kapaʻa, HI · 2 km
- Pono Kai Resort Kapaʻa, HI · 2 km
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