Wednesday
⚠️ fair conditions
Main blocker: Waves
Ishigaki Snorkel Report Today
Japan · Updated Mon 02:30 (JST) · Source: Snapshot · Showing fallback/stale data
The skinny
Go in the best window Report Wed 08:12Ishigaki has a usable snorkeling window around Thu 10:00. The main thing to watch is waves.
Score: 5.2/10
Best time: Thu 10:00
Main risk: Waves
Best morning signal: Wed 09:00 (Fair).
Best afternoon signal: Wed 17:00 (Fair). Peak afternoon wind is about 3.5 m/s.
Good window is available today
Next safe window: Thu 01:00 (4% of next 72h are suitable)
3-day planner
Thursday
✅ good conditions
Main blocker: Waves
Best available hours
Next safe window starts at Thu 01:00.
Why this verdict
Main blockers across the next 72 hours:
- Waves (26 hours)
- Tide/current (26 hours)
- Sea temperature (13 hours)
Jellyfish drift risk
Drift estimate from wind, swell, current and warm water.
Low peak drift risk around Wed 11:00.
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.
Upcoming high tides
Next early morning high tide: Wed 22:00
Wed 10:00, Wed 22:00
Nearby alternatives in Japan
Advanced forecast data
Viewing historical data
Fri 23:00 – Mon 23:00 (JST)
Snorkel Score (selected 24h)
Best snorkel score is 0.17 around Sat 09:00; 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.
Conditions (24h trends)
Tap a chart to load just that series.
0/24 sampled hours stay at or below 0.36m (range 2.48m to 6.1m).
Wind is at or below 5.4m/s in 0/24 sampled hours (range 9.31 to 24.75m/s).
Tides range from 0.48m to 1.92m; 2 of 24 hours are in or near peak slack windows.
72-hour historical overview
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Scoring methodology (for technical users)
We score each hour from 0 to 1 using daylight and these weighted components:
- Wave height (35%): best below 0.36m, then decreases as it rises.
- Wind speed (25%): best below 5.4m/s, lower is better.
- Sea surface temperature (15%): best within 20.6°C to 30.4°C.
- Tide and currents (15%): best around slack/high-tide windows.
- Daylight (10%): visibility and safety gate (outside daylight scores lower).
Detailed hourly data table
| Time | Wave (m) | Wind (m/s) | Sea temp (°C) | Status |
|---|---|---|---|---|
| Fri 23:00 | 6.10 · high | 23.56 · high | 28.30 · good | poor |
| Sat 00:00 | 5.84 · high | 24.75 · high | 28.20 · good | poor |
| Sat 01:00 | 5.74 · high | 18.66 · high | 28.10 · good | poor |
| Sat 02:00 | 5.66 · high | 22.58 · high | 28.10 · good | poor |
| Sat 03:00 | 5.56 · high | 21.89 · high | 28.00 · good | poor |
| Sat 04:00 | 5.44 · high | 20.76 · high | 28.00 · good | poor |
| Sat 05:00 | 5.30 · high | 23.06 · high | 27.90 · good | poor |
| Sat 06:00 | 5.18 · high | 22.13 · high | 27.90 · good | poor |
| Sat 07:00 | 4.90 · high | 20.56 · high | 27.80 · good | poor |
| Sat 08:00 | 4.62 · high | 18.76 · high | 27.80 · good | poor |
| Sat 09:00 | 4.34 · high | 19.69 · high | 27.80 · good | poor |
| Sat 10:00 | 4.10 · high | 17.72 · high | 27.80 · good | poor |
| Sat 11:00 | 3.84 · high | 16.72 · high | 27.80 · good | poor |
| Sat 12:00 | 3.60 · high | 16.15 · high | 27.80 · good | poor |
| Sat 13:00 | 3.44 · high | 15.37 · high | 27.80 · good | poor |
| Sat 14:00 | 3.28 · high | 14.79 · high | 27.70 · good | poor |
| Sat 15:00 | 3.12 · high | 13.84 · high | 27.70 · good | poor |
| Sat 16:00 | 3.02 · high | 12.73 · high | 27.70 · good | poor |
| Sat 17:00 | 2.94 · high | 12.29 · high | 27.60 · good | poor |
| Sat 18:00 | 2.84 · high | 11.22 · high | 27.60 · good | poor |
| Sat 19:00 | 2.74 · high | 10.50 · high | 27.60 · good | poor |
| Sat 20:00 | 2.66 · high | 9.73 · high | 27.60 · good | poor |
| Sat 21:00 | 2.56 · high | 9.31 · high | 27.60 · good | poor |
| Sat 22:00 | 2.48 · high | 9.48 · high | 27.60 · good | poor |
| Sat 23:00 | 2.42 · high | 9.32 · high | 27.70 · good | poor |
| Sun 00:00 | 2.34 · high | 8.82 · high | 27.70 · good | poor |
| Sun 01:00 | 2.30 · high | 8.77 · high | 27.70 · good | poor |
| Sun 02:00 | 2.28 · high | 8.92 · high | 27.70 · good | poor |
| Sun 03:00 | 2.24 · high | 9.04 · high | 27.80 · good | poor |
| Sun 04:00 | 2.18 · high | 9.13 · high | 27.80 · good | poor |
| Sun 05:00 | 2.14 · high | 8.99 · high | 27.90 · good | poor |
| Sun 06:00 | 2.08 · high | 8.76 · high | 27.90 · good | poor |
| Sun 07:00 | 2.04 · high | 9.09 · high | 27.90 · good | poor |
| Sun 08:00 | 2.24 · high | 8.81 · high | 29.20 · good | poor |
| Sun 09:00 | 2.18 · high | 8.57 · high | 29.20 · good | poor |
| Sun 10:00 | 2.14 · high | 8.10 · high | 29.20 · good | poor |
| Sun 11:00 | 2.08 · high | 8.03 · high | 29.10 · good | poor |
| Sun 12:00 | 2.04 · high | 8.12 · high | 29.10 · good | poor |
| Sun 13:00 | 2.04 · high | 8.08 · high | 29.00 · good | poor |
| Sun 14:00 | 2.02 · high | 7.87 · high | 29.00 · good | poor |
| Sun 15:00 | 2.02 · high | 7.58 · high | 29.00 · good | poor |
| Sun 16:00 | 2.00 · high | 7.33 · high | 28.90 · good | poor |
| Sun 17:00 | 1.98 · high | 7.61 · high | 28.90 · good | poor |
| Sun 18:00 | 1.96 · high | 8.27 · high | 28.90 · good | poor |
| Sun 19:00 | 1.94 · high | 6.94 · high | 28.90 · good | poor |
| Sun 20:00 | 1.90 · high | 6.40 · high | 28.80 · good | poor |
| Sun 21:00 | 1.88 · high | 6.37 · high | 28.80 · good | poor |
| Sun 22:00 | 1.84 · high | 6.67 · high | 28.80 · good | poor |
| Sun 23:00 | 1.78 · high | 6.17 · high | 28.80 · good | poor |
| Mon 00:00 | 1.74 · high | 7.47 · high | 28.90 · good | poor |
| Mon 01:00 | 1.72 · high | 7.62 · high | 28.90 · good | poor |
| Mon 02:00 | 1.68 · high | 7.65 · high | 29.00 · good | poor |
| Mon 03:00 | 1.66 · high | 7.81 · high | 29.10 · good | poor |
| Mon 04:00 | 1.64 · high | 7.85 · high | 29.20 · good | poor |
| Mon 05:00 | 1.64 · high | 7.80 · high | 29.30 · good | poor |
| Mon 06:00 | 1.62 · high | 8.08 · high | 29.30 · good | poor |
| Mon 07:00 | 1.60 · high | 8.62 · high | 29.40 · good | poor |
| Mon 08:00 | 1.60 · high | 8.27 · high | 29.40 · good | poor |
| Mon 09:00 | 1.58 · high | 7.64 · high | 29.40 · good | poor |
| Mon 10:00 | 1.58 · high | 8.17 · high | 29.40 · good | poor |
| Mon 11:00 | 1.56 · high | 7.69 · high | 29.40 · good | poor |
| Mon 12:00 | 1.56 · high | 7.20 · high | 29.40 · good | poor |
| Mon 13:00 | 1.54 · high | 7.30 · high | 29.40 · good | poor |
| Mon 14:00 | 1.54 · high | 6.72 · high | 29.30 · good | poor |
| Mon 15:00 | 1.52 · high | 6.86 · high | 29.30 · good | poor |
| Mon 16:00 | 1.50 · high | 6.12 · high | 29.30 · good | poor |
| Mon 17:00 | 1.50 · high | 6.84 · high | 29.20 · good | poor |
| Mon 18:00 | 1.48 · high | 6.36 · high | 29.20 · good | poor |
| Mon 19:00 | 1.48 · high | 6.23 · high | 29.20 · good | poor |
| Mon 20:00 | 1.50 · high | 6.07 · high | 29.20 · good | poor |
| Mon 21:00 | 1.50 · high | 6.86 · high | 29.10 · good | poor |
| Mon 22:00 | 1.48 · high | 7.25 · high | 29.10 · good | poor |