USA · Updated Tue 05:10 (HST) · Source: Snapshot
The skinny
Marginal Data updated Tue 05:10 (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 05:00 (HST)
Poor · 0.0/10
Tue 07:00 (HST)
Poor · 0.0/10
Tue 07:00 (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 07:00 (Poor).
Best afternoon signal: Tue 12:00 (Poor). Peak afternoon wind is about 4.8 m/s.
Kohala Coast is the call later today; Kailua-Kona is the coast to skip.
A Big Island coast looks usable later today. Check boat availability.
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 05:10
Kohala Coast is the call later today; Kailua-Kona is the coast to skip.
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 05:00: 1.0 m waves and 0.2 m/s wind.
Its best forecast hour is Tue 07:00, with 1.0 m waves and 0.5 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 05:00: 1.0 m waves and 0.2 m/s wind.
Its best forecast hour is Tue 07:00, with 1.0 m waves and 0.6 m/s wind.
Its best forecast hour is Tue 07:00, with 1.0 m waves and 0.6 m/s wind.
Anaehoomalu Bay has the best forecast in Kohala Coast later today.
Forecast for the hour starting Tue 05:00: 0.8 m waves and 1.9 m/s wind.
Its best forecast hour is Tue 07:00, with 0.8 m waves and 1.1 m/s wind.
Its best forecast hour is Wed 08:00, with 0.7 m waves and 0.3 m/s wind.
Anaehoomalu Bay · 5.7/10
Its best forecast hour is Tue 07:00, with 0.8 m waves and 1.1 m/s wind.
Swell arrives from W (275°); bays facing away from that direction stay calmer. Tidal current is about 0.40 m/s. The tide is not at high.
Kahaluu Beach Park · 5.2/10
Its best forecast hour is Tue 07:00, with 1.0 m waves and 0.6 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
Wed 05:00 – Sat 05:00 (HST)
Best snorkel score is 0.0 around Wed 05:00; 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 21/24 sampled hours (range 0.68 to 7.68m/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 |
|---|---|---|---|---|
| Wed 05:00 | · high | 3.06 · good | · out of range | Poor |
| Wed 06:00 | · high | 3.60 · good | · out of range | Poor |
| Wed 07:00 | · high | 3.43 · good | · out of range | Poor |
| Wed 08:00 | · high | 2.85 · good | · out of range | Poor |
| Wed 09:00 | · high | 3.43 · good | · out of range | Poor |
| Wed 10:00 | · high | 4.18 · good | · out of range | Poor |
| Wed 11:00 | · high | 4.11 · good | · out of range | Poor |
| Wed 12:00 | · high | 3.79 · good | · out of range | Poor |
| Wed 13:00 | · high | 3.69 · good | · out of range | Poor |
| Wed 14:00 | · high | 4.29 · good | · out of range | Poor |
| Wed 15:00 | · high | 2.44 · good | · out of range | Poor |
| Wed 16:00 | · high | 2.29 · good | · out of range | Poor |
| Wed 17:00 | · high | 1.76 · good | · out of range | Poor |
| Wed 18:00 | · high | 0.68 · good | · out of range | Poor |
| Wed 19:00 | · high | 1.04 · good | · out of range | Poor |
| Wed 20:00 | · high | 7.68 · high | · out of range | Poor |
| Wed 21:00 | · high | 6.49 · high | · out of range | Poor |
| Wed 22:00 | · high | 5.02 · good | · out of range | Poor |
| Wed 23:00 | · high | 5.93 · high | · out of range | Poor |
| Thu 00:00 | · high | 4.19 · good | · out of range | Poor |
| Thu 01:00 | · high | 3.15 · good | · out of range | Poor |
| Thu 02:00 | · high | 1.25 · good | · out of range | Poor |
| Thu 03:00 | · high | 1.22 · good | · out of range | Poor |
| Thu 04:00 | · high | 2.10 · good | · out of range | Poor |
| Thu 05:00 | · high | 1.67 · good | · out of range | Poor |
| Thu 06:00 | · high | 2.00 · good | · out of range | Poor |
| Thu 07:00 | · high | 1.21 · good | · out of range | Poor |
| Thu 08:00 | · high | 2.96 · good | · out of range | Poor |
| Thu 09:00 | · high | 2.49 · good | · out of range | Poor |
| Thu 10:00 | · high | 2.24 · good | · out of range | Poor |
| Thu 11:00 | · high | 3.40 · good | · out of range | Poor |
| Thu 12:00 | · high | 3.10 · good | · out of range | Poor |
| Thu 13:00 | · high | 4.34 · good | · out of range | Poor |
| Thu 14:00 | · high | 5.09 · good | · out of range | Poor |
| Thu 15:00 | · high | 3.06 · good | · out of range | Poor |
| Thu 16:00 | · high | 2.52 · good | · out of range | Poor |
| Thu 17:00 | · high | 3.15 · good | · out of range | Poor |
| Thu 18:00 | · high | 3.05 · good | · out of range | Poor |
| Thu 19:00 | · high | 3.47 · good | · out of range | Poor |
| Thu 20:00 | · high | 7.68 · high | · out of range | Poor |
| Thu 21:00 | · high | 6.59 · high | · out of range | Poor |
| Thu 22:00 | · high | 6.99 · high | · out of range | Poor |
| Thu 23:00 | · high | 5.96 · high | · out of range | Poor |
| Fri 00:00 | · high | 8.33 · high | · out of range | Poor |
| Fri 01:00 | · high | 6.73 · high | · out of range | Poor |
| Fri 02:00 | · high | 6.49 · high | · out of range | Poor |
| Fri 03:00 | · high | 6.71 · high | · out of range | Poor |
| Fri 04:00 | · high | 7.28 · high | · out of range | Poor |
| Fri 05:00 | · high | 9.32 · high | · out of range | Poor |
| Fri 06:00 | · high | 6.30 · high | · out of range | Poor |
| Fri 07:00 | · high | 9.81 · high | · out of range | Poor |
| Fri 08:00 | · high | 10.35 · high | · out of range | Poor |
| Fri 09:00 | · high | 10.38 · high | · out of range | Poor |
| Fri 10:00 | · high | 11.52 · high | · out of range | Poor |
| Fri 11:00 | · high | 9.03 · high | · out of range | Poor |
| Fri 12:00 | · high | 11.77 · high | · out of range | Poor |
| Fri 13:00 | · high | 12.07 · high | · out of range | Poor |
| Fri 14:00 | · high | 10.30 · high | · out of range | Poor |
| Fri 15:00 | · high | 16.41 · high | · out of range | Poor |
| Fri 16:00 | · high | 14.30 · high | · out of range | Poor |
| Fri 17:00 | · high | 15.99 · high | · out of range | Poor |
| Fri 18:00 | · high | 15.35 · high | · out of range | Poor |
| Fri 19:00 | · high | 11.47 · high | · out of range | Poor |
| Fri 20:00 | · high | 15.73 · high | · out of range | Poor |
| Fri 21:00 | · high | 14.74 · high | · out of range | Poor |
| Fri 22:00 | · high | 15.24 · high | · out of range | Poor |
| Fri 23:00 | · high | 17.86 · high | · out of range | Poor |
| Sat 00:00 | · high | 18.91 · high | · out of range | Poor |
| Sat 01:00 | · high | 17.91 · high | · out of range | Poor |
| Sat 02:00 | · high | 1.10 · good | · out of range | Poor |
| Sat 03:00 | · high | 10.56 · high | · out of range | Poor |
| Sat 04:00 | · high | 9.31 · high | · out of range | Poor |
