Courtyard by Marriott King Kamehameha's Kona Beach Hotel beach forecast: weather, water & waves
Kailua-Kona, HI · Hawaiʻi Island (Big Island), United States · 19.640, -155.998
Seaweed, water and beach grades update every 6 hours; live conditions load below.
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Questions about Courtyard by Marriott King Kamehameha's Kona Beach Hotel
Does Courtyard by Marriott King Kamehameha's Kona Beach Hotel get sargassum (seaweed)?
No. Atlantic sargassum does not reach Hawaii.
How warm is the water at Courtyard by Marriott King Kamehameha's Kona Beach Hotel?
About 81°F in October. The sea is warmest in August and September (about 82°F) and coolest in March (about 77°F).
When is the best time to visit Courtyard by Marriott King Kamehameha's Kona Beach Hotel?
For warm water and dry weather, aim for October through February. October is usually the quietest of those, with about 15 rainy days and a sea near 81°F.
When is hurricane season in Hawaiʻi Island?
The central Pacific hurricane season runs June through November. Storms rarely reach Hawaiʻi Island; Veabird rates the risk here as low.
What guests say about Courtyard by Marriott King Kamehameha's Kona Beach Hotel
Guests like Great location · Comfortable rooms · Friendly staff
Watch for Cleanliness issues in the room · Inconsistent service · Expensive buffets
- Cleanliness
6.3 - Service
8.8 - Location
9.3 - Room Quality
7.8 - Amenities
8.3 - Value for Money
7.8 - Food and Beverage
7.3 - Overall Experience
8.3
Read all 534 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.
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Sargassum season at Courtyard by Marriott King Kamehameha's Kona Beach Hotel
Courtyard by Marriott King Kamehameha's Kona Beach Hotel sits outside the reach of the Atlantic sargassum belt; seaweed landings are rare in any month.
Weather & water by month at Courtyard by Marriott King Kamehameha's Kona Beach Hotel
Average highs run from about 78°F in January and February to 83°F in August. The sea is warmest in August and September (about 82°F) and coolest in March (about 77°F). January and November are usually the driest, with about 11 rainy days each; June is the wettest, with about 23 rainy days.
| Month | Avg high | Sea | Rainy days |
|---|---|---|---|
| Jan | 78°F | 78°F | 11 |
| Feb | 78°F | 78°F | 12 |
| Mar | 79°F | 77°F | 17 |
| Apr | 79°F | 78°F | 18 |
| May | 80°F | 79°F | 20 |
| Jun | 80°F | 80°F | 23 |
| Jul | 82°F | 81°F | 19 |
| Aug | 83°F | 82°F | 18 |
| Sep | 82°F | 82°F | 17 |
| Oct | 82°F | 81°F | 15 |
| Nov | 81°F | 80°F | 11 |
| Dec | 80°F | 79°F | 12 |
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.
- Vog (volcanic haze) can affect air quality; check the Hawaiʻi Volcano Observatory.
- Hilo side is much wetter than the Kona–Kohala resort coast.
Check official advisories and local flags before swimming. Decomposing sargassum releases hydrogen sulfide; avoid heavy piles.
Things to do near Kailua-Kona, HI
- Hawaiʻi Volcanoes National Park
- Manta ray night snorkel (Kona)
- Kealakekua Bay
- Maunakea stargazing
- Punaluʻu black sand beach
Fly in for the best beach days
Suggested dates are a week in November. Change them to match the live forecast above.
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Nearest airports
- Kona Intl (KOA), ~12 km
- Hilo Intl (ITO), ~100 km
Nearby resorts
- PACIFIC 19 Kona Kailua-Kona, HI · 0 km
- Holiday Inn Express & Suites Kailua-Kona Kailua-Kona, HI · 1 km
- Kona Islander Inn & Hotel Kailua-Kona, HI · 1 km
- Royal Kona Resort Kailua-Kona, HI · 1 km
- Kona Reef Resort Kailua-Kona, HI · 2 km
- Royal Sea Cliff Resort by Outrigger Kailua-Kona, HI · 3 km
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