Tuesday
⚠️ fair conditions
Main blocker: Waves
USA · Updated Tue 03:12 (HST) · Source: Snapshot
The skinny
Marginal Report Tue 05:02Kealakekua Bay looks marginal today. The least-bad daylight window is around Wed 09:00, but waves is limiting the forecast.
Score: 4.9/10
Best time: Wed 09:00
Main risk: Waves
Best morning signal: Tue 08:00 (Fair).
Best afternoon signal: Tue 13:00 (Fair). Peak afternoon wind is about 1.8 m/s.
Best nearby spots
No safe window in the next 72 hours
Use the best-available section for the least-bad times.
Tuesday
⚠️ fair conditions
Main blocker: Waves
Wednesday
⚠️ fair conditions
Main blocker: Waves
Thursday
⚠️ fair conditions
Main blocker: Waves
Main blockers across the next 72 hours:
Drift estimate from wind, swell, current and warm water.
Low drift risk now.
warm water supports seasonal jellyfish activity; surface drift/current is noticeable; 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.
Tue 20:00, Wed 21:00, Thu 07:00
Local operators found via Tripadvisor. Check conditions before you book.
Sponsored external links
Kona coast snorkel boat tours, including Kealakekua-area trips.
Small-group Kona ocean tours and snorkeling adventures.
Kona snorkel tours for Big Island reef and coast trips.
Compare nearby spots by score, forecast window and exposure before choosing a beach.
Viewing historical data
Tue 15:00 – Fri 15:00 (HST)
Best snorkel score is 0.58 around Tue 11:00; 8 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.
0/24 sampled hours stay at or below 0.36m (range 0.88m to 0.92m).
Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.05 to 1.9m/s).
Tides range from 0.21m to 1.23m; 2 of 24 hours are in or near peak slack windows.
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 15:00 | 0.90 · high | 1.27 · good | 27.80 · good | poor |
| Tue 16:00 | 0.90 · high | 1.07 · good | 27.80 · good | fair |
| Tue 17:00 | 0.90 · high | 1.43 · good | 27.80 · good | fair |
| Tue 18:00 | 0.90 · high | 1.28 · good | 27.80 · good | fair |
| Tue 19:00 | 0.90 · high | 0.70 · good | 27.90 · good | fair |
| Tue 20:00 | 0.90 · high | 0.67 · good | 28.00 · good | good |
| Tue 21:00 | 0.90 · high | 1.03 · good | 28.20 · good | good |
| Tue 22:00 | 0.90 · high | 1.00 · good | 28.30 · good | fair |
| Tue 23:00 | 0.88 · high | 1.50 · good | 28.50 · good | fair |
| Wed 00:00 | 0.88 · high | 1.64 · good | 28.50 · good | poor |
| Wed 01:00 | 0.88 · high | 1.13 · good | 28.50 · good | poor |
| Wed 02:00 | 0.88 · high | 0.35 · good | 28.50 · good | poor |
| Wed 03:00 | 0.88 · high | 0.11 · good | 28.40 · good | poor |
| Wed 04:00 | 0.88 · high | 0.29 · good | 28.30 · good | poor |
| Wed 05:00 | 0.90 · high | 0.11 · good | 28.20 · good | poor |
| Wed 06:00 | 0.90 · high | 0.55 · good | 28.30 · good | poor |
| Wed 07:00 | 0.90 · high | 0.96 · good | 28.20 · good | poor |
| Wed 08:00 | 0.90 · high | 1.51 · good | 28.10 · good | poor |
| Wed 09:00 | 0.90 · high | 1.90 · good | 28.10 · good | poor |
| Wed 10:00 | 0.90 · high | 1.71 · good | 28.00 · good | poor |
| Wed 11:00 | 0.92 · high | 1.06 · good | 28.00 · good | poor |
| Wed 12:00 | 0.92 · high | 0.05 · good | 27.90 · good | poor |
| Wed 13:00 | 0.92 · high | 0.39 · good | 27.90 · good | poor |
| Wed 14:00 | 0.92 · high | 0.40 · good | 27.80 · good | poor |
| Wed 15:00 | 0.92 · high | 0.47 · good | 27.80 · good | poor |
| Wed 16:00 | 0.92 · high | 0.32 · good | 27.80 · good | fair |
| Wed 17:00 | 0.94 · high | 0.52 · good | 27.80 · good | fair |
| Wed 18:00 | 0.94 · high | 0.45 · good | 27.80 · good | fair |
| Wed 19:00 | 0.94 · high | 0.40 · good | 27.90 · good | fair |
| Wed 20:00 | 0.96 · high | 0.75 · good | 28.10 · good | fair |
| Wed 21:00 | 0.96 · high | 0.93 · good | 28.20 · good | fair |
| Wed 22:00 | 0.96 · high | 0.87 · good | 28.40 · good | fair |
| Wed 23:00 | 0.94 · high | 0.58 · good | 28.50 · good | fair |
| Thu 00:00 | 0.94 · high | 0.47 · good | 28.60 · good | poor |
| Thu 01:00 | 0.94 · high | 0.14 · good | 28.60 · good | poor |
| Thu 02:00 | 0.94 · high | 0.22 · good | 28.60 · good | poor |
| Thu 03:00 | 0.94 · high | 0.47 · good | 28.50 · good | poor |
| Thu 04:00 | 0.94 · high | 1.14 · good | 28.40 · good | poor |
| Thu 05:00 | 0.94 · high | 0.96 · good | 28.30 · good | poor |
| Thu 06:00 | 0.94 · high | 0.83 · good | 28.30 · good | poor |
| Thu 07:00 | 0.94 · high | 0.96 · good | 28.20 · good | poor |
| Thu 08:00 | 0.94 · high | 1.30 · good | 28.20 · good | poor |
| Thu 09:00 | 0.94 · high | 0.97 · good | 28.10 · good | poor |
| Thu 10:00 | 0.94 · high | 0.50 · good | 28.00 · good | poor |
| Thu 11:00 | 0.96 · high | 0.46 · good | 28.00 · good | poor |
| Thu 12:00 | 0.96 · high | 0.40 · good | 27.90 · good | poor |
| Thu 13:00 | 0.96 · high | 0.62 · good | 27.90 · good | poor |
| Thu 14:00 | 0.94 · high | 0.65 · good | 27.80 · good | poor |
| Thu 15:00 | 0.94 · high | 0.50 · good | 27.80 · good | poor |
| Thu 16:00 | 0.94 · high | 0.35 · good | 27.80 · good | fair |
| Thu 17:00 | 0.94 · high | 0.25 · good | 27.80 · good | fair |
| Thu 18:00 | 0.94 · high | 0.36 · good | 27.80 · good | fair |
| Thu 19:00 | 0.94 · high | 0.50 · good | 27.80 · good | fair |
| Thu 20:00 | 0.92 · high | 0.83 · good | 27.90 · good | fair |
| Thu 21:00 | 0.92 · high | 1.20 · good | 28.10 · good | fair |
| Thu 22:00 | 0.92 · high | 1.24 · good | 28.20 · good | fair |
| Thu 23:00 | 0.92 · high | 1.41 · good | 28.30 · good | fair |
| Fri 00:00 | 0.92 · high | 1.50 · good | 28.30 · good | poor |
| Fri 01:00 | 0.92 · high | 1.07 · good | 28.30 · good | poor |
| Fri 02:00 | 0.92 · high | 0.78 · good | 28.30 · good | poor |
| Fri 03:00 | 0.92 · high | 1.17 · good | 28.20 · good | poor |
| Fri 04:00 | 0.92 · high | 2.04 · good | 28.20 · good | poor |
| Fri 05:00 | 0.92 · high | 2.21 · good | 28.10 · good | poor |
| Fri 06:00 | 0.92 · high | 2.01 · good | 28.00 · good | poor |
| Fri 07:00 | 0.92 · high | 1.60 · good | 28.00 · good | poor |
| Fri 08:00 | 0.94 · high | 1.05 · good | 27.90 · good | poor |
| Fri 09:00 | 0.94 · high | 0.45 · good | 27.90 · good | poor |
| Fri 10:00 | 0.94 · high | 1.01 · good | 27.80 · good | poor |
| Fri 11:00 | 0.94 · high | 0.78 · good | 27.80 · good | poor |
| Fri 12:00 | 0.94 · high | 0.70 · good | 27.80 · good | poor |
| Fri 13:00 | 0.94 · high | 0.25 · good | 27.70 · good | poor |
| Fri 14:00 | 0.94 · high | 0.16 · good | 27.70 · good | poor |