USA · Updated Tue 22:05 (HST) · Source: Snapshot
The skinny
Poor Data updated Tue 22:05 (HST)Big Island has no good model window later today. Check the three-day outlook and official beach advisories.
Poor · 0.0/10
Tue 22:00 (HST)
No fresh data for this period.
Poor · 0.0/10
Wed 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: -
Main risk: Waves
No useful morning window is showing yet.
No useful afternoon window is showing yet.
Two Step Honaunau is the call tomorrow morning; skip Kealakekua Bay.
A Big Island coast looks usable later today. Check boat availability.
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 22:05
Two Step Honaunau is the call tomorrow morning; skip Kealakekua Bay.
Compare the coasts by forecast period. These are model estimates, not beach observations. Open each beach report and check official advisories before leaving.
Two Step Honaunau has the best forecast in South Kona tomorrow morning.
Forecast for the hour starting Tue 22:00: 1.0 m waves and 0.8 m/s wind.
No fresh data for this period.
Its best forecast hour is Fri 09:00, with 1.0 m waves and 0.1 m/s wind.
Kahaluu Beach Park has the best forecast in Kailua-Kona tomorrow morning.
Forecast for the hour starting Tue 22:00: 1.0 m waves and 2.3 m/s wind.
No fresh data for this period.
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 tomorrow morning.
Forecast for the hour starting Tue 22:00: 0.7 m waves and 0.1 m/s wind.
No fresh data for this period.
Its best forecast hour is Wed 08:00, with 0.7 m waves and 0.8 m/s wind.
Two Step Honaunau · 5.8/10
Its best forecast hour is Fri 09:00, with 1.0 m waves and 0.1 m/s wind.
Swell arrives from SW (233°); bays facing away from that direction stay calmer. Tidal current is about 0.40 m/s. The tide is not at high.
Kealakekua Bay · 5.2/10
Its best forecast hour is Wed 11:00, 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
Tue 22:00 – Fri 22:00 (HST)
Best snorkel score is 0.0 around Tue 22:00; 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 0.34 to 5.87m/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 |
|---|---|---|---|---|
| Tue 22:00 | · high | 1.01 · good | · out of range | Poor |
| Tue 23:00 | · high | 0.70 · good | · out of range | Poor |
| Wed 00:00 | · high | 0.92 · good | · out of range | Poor |
| Wed 01:00 | · high | 1.51 · good | · out of range | Poor |
| Wed 02:00 | · high | 0.34 · good | · out of range | Poor |
| Wed 03:00 | · high | 0.38 · good | · out of range | Poor |
| Wed 04:00 | · high | 1.13 · good | · out of range | Poor |
| Wed 05:00 | · high | 1.52 · good | · out of range | Poor |
| Wed 06:00 | · high | 2.08 · good | · out of range | Poor |
| Wed 07:00 | · high | 1.79 · good | · out of range | Poor |
| Wed 08:00 | · high | 1.00 · good | · out of range | Poor |
| Wed 09:00 | · high | 2.06 · good | · out of range | Poor |
| Wed 10:00 | · high | 3.26 · good | · out of range | Poor |
| Wed 11:00 | · high | 4.52 · good | · out of range | Poor |
| Wed 12:00 | · high | 4.78 · good | · out of range | Poor |
| Wed 13:00 | · high | 5.20 · good | · out of range | Poor |
| Wed 14:00 | · high | 5.60 · high | · out of range | Poor |
| Wed 15:00 | · high | 5.87 · high | · out of range | Poor |
| Wed 16:00 | · high | 5.46 · high | · out of range | Poor |
| Wed 17:00 | · high | 4.57 · good | · out of range | Poor |
| Wed 18:00 | · high | 4.35 · good | · out of range | Poor |
| Wed 19:00 | · high | 4.26 · good | · out of range | Poor |
| Wed 20:00 | · high | 2.53 · good | · out of range | Poor |
| Wed 21:00 | · high | 2.23 · good | · out of range | Poor |
| Wed 22:00 | · high | 1.84 · good | · out of range | Poor |
| Wed 23:00 | · high | 2.09 · good | · out of range | Poor |
| Thu 00:00 | · high | 1.86 · good | · out of range | Poor |
| Thu 01:00 | · high | 1.91 · good | · out of range | Poor |
| Thu 02:00 | · high | 1.82 · good | · out of range | Poor |
| Thu 03:00 | · high | 1.07 · good | · out of range | Poor |
| Thu 04:00 | · high | 1.39 · good | · out of range | Poor |
| Thu 05:00 | · high | 1.58 · good | · out of range | Poor |
| Thu 06:00 | · high | 1.50 · good | · out of range | Poor |
| Thu 07:00 | · high | 1.35 · good | · out of range | Poor |
| Thu 08:00 | · high | 0.51 · good | · out of range | Poor |
| Thu 09:00 | · high | 1.86 · good | · out of range | Poor |
| Thu 10:00 | · high | 3.80 · good | · out of range | Poor |
| Thu 11:00 | · high | 4.05 · good | · out of range | Poor |
| Thu 12:00 | · high | 4.40 · good | · out of range | Poor |
| Thu 13:00 | · high | 4.43 · good | · out of range | Poor |
| Thu 14:00 | · high | 3.97 · good | · out of range | Poor |
| Thu 15:00 | · high | 4.12 · good | · out of range | Poor |
| Thu 16:00 | · high | 3.81 · good | · out of range | Poor |
| Thu 17:00 | · high | 2.86 · good | · out of range | Poor |
| Thu 18:00 | · high | 2.20 · good | · out of range | Poor |
| Thu 19:00 | · high | 1.01 · good | · out of range | Poor |
| Thu 20:00 | · high | 1.59 · good | · out of range | Poor |
| Thu 21:00 | · high | 1.27 · good | · out of range | Poor |
| Thu 22:00 | · high | 1.39 · good | · out of range | Poor |
| Thu 23:00 | · high | 1.71 · good | · out of range | Poor |
| Fri 00:00 | · high | 2.04 · good | · out of range | Poor |
| Fri 01:00 | · high | 2.04 · good | · out of range | Poor |
| Fri 02:00 | · high | 1.77 · good | · out of range | Poor |
| Fri 03:00 | · high | 1.98 · good | · out of range | Poor |
| Fri 04:00 | · high | 1.42 · good | · out of range | Poor |
| Fri 05:00 | · high | 1.51 · good | · out of range | Poor |
| Fri 06:00 | · high | 1.96 · good | · out of range | Poor |
| Fri 07:00 | · high | 2.07 · good | · out of range | Poor |
| Fri 08:00 | · high | 1.50 · good | · out of range | Poor |
| Fri 09:00 | · high | 2.53 · good | · out of range | Poor |
| Fri 10:00 | · high | 3.62 · good | · out of range | Poor |
| Fri 11:00 | · high | 4.08 · good | · out of range | Poor |
| Fri 12:00 | · high | 4.82 · good | · out of range | Poor |
| Fri 13:00 | · high | 4.80 · good | · out of range | Poor |
| Fri 14:00 | · high | 4.59 · good | · out of range | Poor |
| Fri 15:00 | · high | 3.53 · good | · out of range | Poor |
| Fri 16:00 | · high | 3.04 · good | · out of range | Poor |
| Fri 17:00 | · high | 1.82 · good | · out of range | Poor |
| Fri 18:00 | · high | 1.71 · good | · out of range | Poor |
| Fri 19:00 | · high | 1.98 · good | · out of range | Poor |
| Fri 20:00 | · high | 1.53 · good | · out of range | Poor |
| Fri 21:00 | · high | 0.85 · good | · out of range | Poor |
