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 12:00 (HST)
Poor · 0.0/10
Tue 13:00 (HST)
Poor · 0.0/10
Tue 13:00 (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
No useful morning window is showing yet.
Best afternoon signal: Tue 13:00 (Poor). Peak afternoon wind is about 4.3 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 12:00: 1.0 m waves and 1.0 m/s wind.
Its best forecast hour is Tue 13:00, with 1.0 m waves and 0.7 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 12:00: 0.9 m waves and 3.5 m/s wind.
Its best forecast hour is Tue 13:00, with 1.0 m waves and 2.9 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 12:00: 0.7 m waves and 4.7 m/s wind.
Its best forecast hour is Tue 13:00, with 0.7 m waves and 3.1 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 · 4.3/10
Its best forecast hour is Tue 13:00, with 1.0 m waves and 2.9 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
Mon 12:00 – Thu 12:00 (HST)
Best snorkel score is 0.0 around Mon 12:00; 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 23/24 sampled hours (range 0.51 to 5.49m/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 |
|---|---|---|---|---|
| Mon 12:00 | · high | 5.21 · good | · out of range | Poor |
| Mon 13:00 | · high | 5.31 · good | · out of range | Poor |
| Mon 14:00 | · high | 5.13 · good | · out of range | Poor |
| Mon 15:00 | · high | 4.56 · good | · out of range | Poor |
| Mon 16:00 | · high | 3.85 · good | · out of range | Poor |
| Mon 17:00 | · high | 2.94 · good | · out of range | Poor |
| Mon 18:00 | · high | 2.36 · good | · out of range | Poor |
| Mon 19:00 | · high | 1.33 · good | · out of range | Poor |
| Mon 20:00 | · high | 0.51 · good | · out of range | Poor |
| Mon 21:00 | · high | 1.20 · good | · out of range | Poor |
| Mon 22:00 | · high | 1.62 · good | · out of range | Poor |
| Mon 23:00 | · high | 1.20 · good | · out of range | Poor |
| Tue 00:00 | · high | 1.18 · good | · out of range | Poor |
| Tue 01:00 | · high | 1.40 · good | · out of range | Poor |
| Tue 02:00 | · high | 1.41 · good | · out of range | Poor |
| Tue 03:00 | · high | 1.40 · good | · out of range | Poor |
| Tue 04:00 | · high | 1.30 · good | · out of range | Poor |
| Tue 05:00 | · high | 1.30 · good | · out of range | Poor |
| Tue 06:00 | · high | 1.27 · good | · out of range | Poor |
| Tue 07:00 | · high | 1.25 · good | · out of range | Poor |
| Tue 08:00 | · high | 1.44 · good | · out of range | Poor |
| Tue 09:00 | · high | 3.26 · good | · out of range | Poor |
| Tue 10:00 | · high | 4.51 · good | · out of range | Poor |
| Tue 11:00 | · high | 5.49 · high | · out of range | Poor |
| Tue 12:00 | · high | 4.86 · good | · out of range | Poor |
| Tue 13:00 | · high | 4.57 · good | · out of range | Poor |
| Tue 14:00 | · high | 3.94 · good | · out of range | Poor |
| Tue 15:00 | · high | 4.07 · good | · out of range | Poor |
| Tue 16:00 | · high | 4.14 · good | · out of range | Poor |
| Tue 17:00 | · high | 3.50 · good | · out of range | Poor |
| Tue 18:00 | · high | 4.09 · good | · out of range | Poor |
| Tue 19:00 | · high | 2.75 · good | · out of range | Poor |
| Tue 20:00 | · high | 1.89 · good | · out of range | Poor |
| Tue 21:00 | · high | 1.57 · good | · out of range | Poor |
| Tue 22:00 | · high | 0.89 · good | · out of range | Poor |
| Tue 23:00 | · high | 1.36 · good | · out of range | Poor |
| Wed 00:00 | · high | 1.92 · good | · out of range | Poor |
| Wed 01:00 | · high | 2.30 · good | · out of range | Poor |
| Wed 02:00 | · high | 1.32 · good | · out of range | Poor |
| Wed 03:00 | · high | 1.91 · good | · out of range | Poor |
| Wed 04:00 | · high | 2.15 · good | · out of range | Poor |
| Wed 05:00 | · high | 1.84 · good | · out of range | Poor |
| Wed 06:00 | · high | 2.01 · good | · out of range | Poor |
| Wed 07:00 | · high | 1.50 · good | · out of range | Poor |
| Wed 08:00 | · high | 1.17 · good | · out of range | Poor |
| Wed 09:00 | · high | 2.77 · good | · out of range | Poor |
| Wed 10:00 | · high | 3.82 · good | · out of range | Poor |
| Wed 11:00 | · high | 4.20 · good | · out of range | Poor |
| Wed 12:00 | · high | 4.73 · good | · out of range | Poor |
| Wed 13:00 | · high | 4.31 · good | · out of range | Poor |
| Wed 14:00 | · high | 4.57 · good | · out of range | Poor |
| Wed 15:00 | · high | 4.56 · good | · out of range | Poor |
| Wed 16:00 | · high | 4.21 · good | · out of range | Poor |
| Wed 17:00 | · high | 3.88 · good | · out of range | Poor |
| Wed 18:00 | · high | 3.01 · good | · out of range | Poor |
| Wed 19:00 | · high | 2.53 · good | · out of range | Poor |
| Wed 20:00 | · high | 2.86 · good | · out of range | Poor |
| Wed 21:00 | · high | 2.84 · good | · out of range | Poor |
| Wed 22:00 | · high | 2.70 · good | · out of range | Poor |
| Wed 23:00 | · high | 2.48 · good | · out of range | Poor |
| Thu 00:00 | · high | 1.46 · good | · out of range | Poor |
| Thu 01:00 | · high | 1.87 · good | · out of range | Poor |
| Thu 02:00 | · high | 1.95 · good | · out of range | Poor |
| Thu 03:00 | · high | 2.23 · good | · out of range | Poor |
| Thu 04:00 | · high | 2.81 · good | · out of range | Poor |
| Thu 05:00 | · high | 2.78 · good | · out of range | Poor |
| Thu 06:00 | · high | 2.57 · good | · out of range | Poor |
| Thu 07:00 | · high | 2.14 · good | · out of range | Poor |
| Thu 08:00 | · high | 2.10 · good | · out of range | Poor |
| Thu 09:00 | · high | 3.02 · good | · out of range | Poor |
| Thu 10:00 | · high | 3.53 · good | · out of range | Poor |
| Thu 11:00 | · high | 3.63 · good | · out of range | Poor |
