Wednesday
✅ good conditions
Main blocker: Waves
Miyako Snorkel Report Today
Japan · Updated Tue 04:14 (JST) · Source: Snapshot
The skinny
Go in the best window Report Wed 03:26Miyako has a usable snorkeling window around Wed 13:00. The main thing to watch is waves.
Score: 5.8/10
Best time: Wed 13:00
Main risk: Waves
Best morning signal: Wed 10:00 (Fair).
Best afternoon signal: Wed 19:00 (Good). Peak afternoon wind is about 2.3 m/s.
Good window is available today
Next safe window: Wed 04:00–10:00 (32% of next 72h are suitable)
3-day planner
Thursday
✅ excellent conditions
Main blocker: Waves
Friday
⚠️ fair conditions
Main blocker: Waves
Best available hours
Next safe window starts at Wed 04:00 until 10:00.
Why this verdict
Main blockers across the next 72 hours:
- Waves (57 hours)
- Tide/current (52 hours)
- Darkness (31 hours)
Jellyfish drift risk
Drift estimate from wind, swell, current and warm water.
Low peak drift risk around Wed 10:00.
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: Thu 17:00
Wed 04:00, Thu 06:00, Thu 17:00
Nearby alternatives in Japan
Advanced forecast data
Viewing historical data
Mon 18:00 – Thu 18:00 (JST)
Snorkel Score (selected 24h)
Best snorkel score is 0.34 around Tue 19:00; 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 1.14m to 1.46m).
Wind is at or below 5.4m/s in 0/24 sampled hours (range 5.41 to 7.36m/s).
Tides range from -0.18m to 1.96m; 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 |
|---|---|---|---|---|
| Mon 18:00 | 1.46 · high | 6.50 · high | 27.70 · good | poor |
| Mon 19:00 | 1.46 · high | 6.82 · high | 27.70 · good | poor |
| Mon 20:00 | 1.46 · high | 6.82 · high | 27.60 · good | poor |
| Mon 21:00 | 1.46 · high | 7.15 · high | 27.60 · good | poor |
| Mon 22:00 | 1.44 · high | 7.36 · high | 27.60 · good | poor |
| Mon 23:00 | 1.42 · high | 6.52 · high | 27.60 · good | poor |
| Tue 00:00 | 1.40 · high | 6.16 · high | 27.70 · good | poor |
| Tue 01:00 | 1.38 · high | 6.04 · high | 27.80 · good | poor |
| Tue 02:00 | 1.34 · high | 6.26 · high | 27.90 · good | poor |
| Tue 03:00 | 1.32 · high | 6.03 · high | 28.00 · good | poor |
| Tue 04:00 | 1.30 · high | 5.77 · high | 28.10 · good | poor |
| Tue 05:00 | 1.28 · high | 5.46 · high | 28.20 · good | poor |
| Tue 06:00 | 1.26 · high | 5.41 · high | 28.30 · good | poor |
| Tue 07:00 | 1.24 · high | 5.65 · high | 28.40 · good | poor |
| Tue 08:00 | 1.20 · high | 5.75 · high | 28.40 · good | poor |
| Tue 09:00 | 1.18 · high | 5.61 · high | 28.40 · good | poor |
| Tue 10:00 | 1.18 · high | 5.73 · high | 28.40 · good | poor |
| Tue 11:00 | 1.16 · high | 5.57 · high | 28.40 · good | poor |
| Tue 12:00 | 1.16 · high | 5.85 · high | 28.40 · good | poor |
| Tue 13:00 | 1.16 · high | 5.85 · high | 28.40 · good | poor |
| Tue 14:00 | 1.16 · high | 5.85 · high | 28.40 · good | poor |
| Tue 15:00 | 1.16 · high | 5.80 · high | 28.30 · good | poor |
| Tue 16:00 | 1.16 · high | 5.85 · high | 28.30 · good | poor |
| Tue 17:00 | 1.14 · high | 5.81 · high | 28.20 · good | poor |
| Tue 18:00 | 1.14 · high | 5.87 · high | 28.20 · good | poor |
| Tue 19:00 | 1.14 · high | 5.98 · high | 28.10 · good | poor |
| Tue 20:00 | 1.12 · high | 5.96 · high | 28.10 · good | poor |
| Tue 21:00 | 1.12 · high | 5.90 · high | 28.10 · good | poor |
| Tue 22:00 | 1.10 · high | 5.95 · high | 28.00 · good | poor |
| Tue 23:00 | 1.10 · high | 5.66 · high | 28.00 · good | poor |
| Wed 00:00 | 1.08 · high | 5.02 · good | 28.00 · good | fair |
| Wed 01:00 | 1.06 · high | 5.06 · good | 28.10 · good | poor |
| Wed 02:00 | 1.04 · high | 4.74 · good | 28.10 · good | poor |
| Wed 03:00 | 1.02 · high | 5.36 · good | 28.20 · good | poor |
| Wed 04:00 | 1.02 · high | 5.09 · good | 28.30 · good | poor |
| Wed 05:00 | 1.02 · high | 4.84 · good | 28.40 · good | poor |
| Wed 06:00 | 1.02 · high | 4.84 · good | 28.50 · good | poor |
| Wed 07:00 | 1.02 · high | 4.47 · good | 28.70 · good | fair |
| Wed 08:00 | 1.02 · high | 4.31 · good | 28.70 · good | poor |
| Wed 09:00 | 1.00 · high | 4.48 · good | 28.70 · good | poor |
| Wed 10:00 | 0.98 · high | 4.23 · good | 28.80 · good | fair |
| Wed 11:00 | 0.98 · high | 4.20 · good | 28.80 · good | poor |
| Wed 12:00 | 0.96 · high | 4.41 · good | 28.80 · good | poor |
| Wed 13:00 | 0.96 · high | 4.21 · good | 28.80 · good | poor |
| Wed 14:00 | 0.94 · high | 4.52 · good | 28.70 · good | poor |
| Wed 15:00 | 0.94 · high | 4.90 · good | 28.70 · good | poor |
| Wed 16:00 | 0.94 · high | 5.22 · good | 28.70 · good | poor |
| Wed 17:00 | 0.94 · high | 5.61 · high | 28.60 · good | poor |
| Wed 18:00 | 0.94 · high | 5.51 · high | 28.60 · good | poor |
| Wed 19:00 | 0.94 · high | 4.99 · good | 28.50 · good | poor |
| Wed 20:00 | 0.92 · high | 5.35 · good | 28.50 · good | poor |
| Wed 21:00 | 0.92 · high | 5.01 · good | 28.50 · good | poor |
| Wed 22:00 | 0.92 · high | 4.36 · good | 28.40 · good | poor |
| Wed 23:00 | 0.94 · high | 4.62 · good | 28.40 · good | poor |
| Thu 00:00 | 0.94 · high | 4.72 · good | 28.40 · good | fair |
| Thu 01:00 | 0.96 · high | 5.23 · good | 28.50 · good | poor |
| Thu 02:00 | 0.96 · high | 5.71 · high | 28.50 · good | poor |
| Thu 03:00 | 0.98 · high | 5.83 · high | 28.60 · good | poor |
| Thu 04:00 | 1.00 · high | 5.73 · high | 28.70 · good | poor |
| Thu 05:00 | 1.00 · high | 5.88 · high | 28.70 · good | poor |
| Thu 06:00 | 1.02 · high | 5.99 · high | 28.80 · good | poor |
| Thu 07:00 | 1.02 · high | 5.64 · high | 28.80 · good | fair |
| Thu 08:00 | 1.00 · high | 5.34 · good | 28.80 · good | poor |
| Thu 09:00 | 1.00 · high | 5.17 · good | 28.80 · good | poor |
| Thu 10:00 | 1.00 · high | 4.56 · good | 28.80 · good | fair |
| Thu 11:00 | 0.98 · high | 4.57 · good | 28.80 · good | poor |
| Thu 12:00 | 0.98 · high | 5.19 · good | 28.80 · good | poor |
| Thu 13:00 | 0.96 · high | 5.28 · good | 28.80 · good | poor |
| Thu 14:00 | 0.96 · high | 5.02 · good | 28.80 · good | poor |
| Thu 15:00 | 0.94 · high | 5.75 · high | 28.80 · good | poor |
| Thu 16:00 | 0.96 · high | 5.57 · high | 28.70 · good | poor |
| Thu 17:00 | 0.98 · high | 6.04 · high | 28.70 · good | poor |