USA · Updated Tue 08:38 (HST) · Source: Snapshot
The skinny
Marginal Data updated Tue 08:38 (HST)Big Island looks marginal today. The least-bad daylight window is around Tue 13:00, but waves is limiting the forecast.
Poor · 0.0/10
Tue 08:00 (HST)
Poor · 0.0/10
Tue 09:00 (HST)
Poor · 0.0/10
Tue 09:00 (HST)
Model estimates using Open-Meteo; not observations or safety guarantees. Check official advisories and conditions at the beach.
Score: 0.0/10
Best time: Tue 13:00
Main risk: Waves
Best morning signal: Tue 09:00 (Poor).
Best afternoon signal: Tue 12:00 (Poor). Peak afternoon wind is about 4.8 m/s.
Best nearby spots later today
Read the Hawaii snorkeling guide for coast, access and best-month guidance. Also: Maui vs Big Island, Maui vs Oahu
Tuesday, September 29, 2026 · HST · Data updated Tue 08:38
Compare the coasts by forecast period. These are model estimates, not beach observations. Open each beach report and check official advisories before leaving.
Kealakekua Bay has the best forecast in South Kona later today.
Forecast for the hour starting Tue 08:00: 1.0 m waves and 1.1 m/s wind.
Its best forecast hour is Tue 09:00, with 1.0 m waves and 1.2 m/s wind.
Its best forecast hour is Wed 12:00, with 1.1 m waves and 0.4 m/s wind.
Kahaluu Beach Park has the best forecast in Kailua-Kona later today.
Forecast for the hour starting Tue 08:00: 1.0 m waves and 1.0 m/s wind.
Its best forecast hour is Tue 09:00, with 1.0 m waves and 2.1 m/s wind.
Its best forecast hour is Wed 07:00, with 1.0 m waves and 2.0 m/s wind.
Anaehoomalu Bay has the best forecast in Kohala Coast later today.
Forecast for the hour starting Tue 08:00: 0.8 m waves and 1.7 m/s wind.
Its best forecast hour is Tue 09:00, with 0.7 m waves and 1.9 m/s wind.
Its best forecast hour is Wed 08:00, with 0.7 m waves and 0.3 m/s wind.
No beach in this Big Island report reaches our good model threshold later today. Check the hourly beach forecasts and official alerts before entering the water.
Kahaluu Beach Park · 4.9/10
Its best forecast hour is Tue 09:00, with 1.0 m waves and 2.1 m/s wind.
Big Island sea temperature · Compare Hawaii islands · Read the Hawaii snorkeling guide
The score uses the hourly wave, wind, water temperature, tide and current forecast. A beach can differ from the wider forecast grid. Check beach signs, lifeguards and official alerts before you enter.
AreaHawaii Island
DifficultyVaries by beach
Best timeMorning
ExposureKona coast is often calmer; east side is windier
ShoreIsland hub
No good model window in the next 72 hours
Use the best-available section for the least-bad times.
Tuesday
❌ Poor conditions
Main blocker: Waves
Wednesday
❌ Poor conditions
Main blocker: Waves
Thursday
❌ Poor conditions
Main blocker: Waves
Main blockers across the next 72 hours:
Drift estimate from wind, swell, current and warm water.
Low drift risk now.
local shoreline exposure is not mapped yet.
Sightings override the model: if you see small purple jellyfish with long trailing tentacles, treat them as sting-capable and give them space.
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Compare nearby spot forecasts for later today before choosing a beach.
Use the map to see where the compared spots sit. Open a card for the hourly forecast.
This is a location diagram, not a marine chart. Check the shore and local signs in person.
Viewing historical data
Sat 08:00 – Tue 08:00 (HST)
Best snorkel score is 0.0 around Sat 08:00; 0 of 24 hours are good, fair, or excellent.
Score trend, higher is better. Excellent ≥ 0.72, good 0.55–0.72, fair 0.35–0.55.
Tap a chart to load just that series.
No wave-height trend data is available for the next 24 hours yet.
Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.25 to 4.56m/s).
No tide trend data is available for the next 24 hours yet.
We score each hour from 0 to 1 using daylight and these weighted components:
| Time | Wave (m) | Wind (m/s) | Sea temp (°C) | Status |
|---|---|---|---|---|
| Sat 08:00 | · high | 0.25 · good | · out of range | Poor |
| Sat 09:00 | · high | 1.75 · good | · out of range | Poor |
| Sat 10:00 | · high | 3.38 · good | · out of range | Poor |
| Sat 11:00 | · high | 4.36 · good | · out of range | Poor |
| Sat 12:00 | · high | 4.51 · good | · out of range | Poor |
| Sat 13:00 | · high | 4.56 · good | · out of range | Poor |
| Sat 14:00 | · high | 3.57 · good | · out of range | Poor |
| Sat 15:00 | · high | 3.47 · good | · out of range | Poor |
| Sat 16:00 | · high | 3.75 · good | · out of range | Poor |
| Sat 17:00 | · high | 2.82 · good | · out of range | Poor |
| Sat 18:00 | · high | 1.68 · good | · out of range | Poor |
| Sat 19:00 | · high | 1.23 · good | · out of range | Poor |
| Sat 20:00 | · high | 1.15 · good | · out of range | Poor |
| Sat 21:00 | · high | 1.35 · good | · out of range | Poor |
| Sat 22:00 | · high | 1.64 · good | · out of range | Poor |
| Sat 23:00 | · high | 1.02 · good | · out of range | Poor |
| Sun 00:00 | · high | 1.35 · good | · out of range | Poor |
| Sun 01:00 | · high | 2.04 · good | · out of range | Poor |
| Sun 02:00 | · high | 1.80 · good | · out of range | Poor |
| Sun 03:00 | · high | 1.68 · good | · out of range | Poor |
| Sun 04:00 | · high | 1.66 · good | · out of range | Poor |
| Sun 05:00 | · high | 1.83 · good | · out of range | Poor |
| Sun 06:00 | · high | 2.00 · good | · out of range | Poor |
| Sun 07:00 | · high | 1.66 · good | · out of range | Poor |
| Sun 08:00 | · high | 0.38 · good | · out of range | Poor |
| Sun 09:00 | · high | 2.25 · good | · out of range | Poor |
| Sun 10:00 | · high | 3.14 · good | · out of range | Poor |
| Sun 11:00 | · high | 3.81 · good | · out of range | Poor |
| Sun 12:00 | · high | 4.12 · good | · out of range | Poor |
| Sun 13:00 | · high | 4.48 · good | · out of range | Poor |
| Sun 14:00 | · high | 4.60 · good | · out of range | Poor |
| Sun 15:00 | · high | 4.09 · good | · out of range | Poor |
| Sun 16:00 | · high | 3.83 · good | · out of range | Poor |
| Sun 17:00 | · high | 2.95 · good | · out of range | Poor |
| Sun 18:00 | · high | 1.92 · good | · out of range | Poor |
| Sun 19:00 | · high | 1.53 · good | · out of range | Poor |
| Sun 20:00 | · high | 1.72 · good | · out of range | Poor |
| Sun 21:00 | · high | 1.88 · good | · out of range | Poor |
| Sun 22:00 | · high | 1.72 · good | · out of range | Poor |
| Sun 23:00 | · high | 2.02 · good | · out of range | Poor |
| Mon 00:00 | · high | 1.91 · good | · out of range | Poor |
| Mon 01:00 | · high | 1.17 · good | · out of range | Poor |
| Mon 02:00 | · high | 1.63 · good | · out of range | Poor |
| Mon 03:00 | · high | 1.47 · good | · out of range | Poor |
| Mon 04:00 | · high | 1.63 · good | · out of range | Poor |
| Mon 05:00 | · high | 2.43 · good | · out of range | Poor |
| Mon 06:00 | · high | 2.50 · good | · out of range | Poor |
| Mon 07:00 | · high | 2.15 · good | · out of range | Poor |
| Mon 08:00 | · high | 2.08 · good | · out of range | Poor |
| Mon 09:00 | · high | 3.14 · good | · out of range | Poor |
| Mon 10:00 | · high | 3.85 · good | · out of range | Poor |
| Mon 11:00 | · high | 4.51 · good | · out of range | Poor |
| Mon 12:00 | · high | 4.56 · good | · out of range | Poor |
| Mon 13:00 | · high | 4.76 · good | · out of range | Poor |
| Mon 14:00 | · high | 4.62 · good | · out of range | Poor |
| Mon 15:00 | · high | 4.20 · good | · out of range | Poor |
| Mon 16:00 | · high | 3.71 · good | · out of range | Poor |
| Mon 17:00 | · high | 4.14 · good | · out of range | Poor |
| Mon 18:00 | · high | 3.43 · good | · out of range | Poor |
| Mon 19:00 | · high | 2.94 · good | · out of range | Poor |
| Mon 20:00 | · high | 2.60 · good | · out of range | Poor |
| Mon 21:00 | · high | 1.19 · good | · out of range | Poor |
| Mon 22:00 | · high | 1.36 · good | · out of range | Poor |
| Mon 23:00 | · high | 1.80 · good | · out of range | Poor |
| Tue 00:00 | · high | 0.96 · good | · out of range | Poor |
| Tue 01:00 | · high | 0.86 · good | · out of range | Poor |
| Tue 02:00 | · high | 0.16 · good | · out of range | Poor |
| Tue 03:00 | · high | 1.08 · good | · out of range | Poor |
| Tue 04:00 | · high | 0.91 · good | · out of range | Poor |
| Tue 05:00 | · high | 1.15 · good | · out of range | Poor |
| Tue 06:00 | · high | 1.79 · good | · out of range | Poor |
| Tue 07:00 | · high | 1.41 · good | · out of range | Poor |
