SnorkelForecast.com

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 06:35

Ishigaki 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.

Email me when it is good

Sunrise

06:10

Sunset

19:29

Water

30.3°C

Max air

30.7°C

Sky

Clear

23% cloud

Good window is available today

Next safe window: Thu 01:00 (4% of next 72h are suitable)

3-day planner Best available Show data

3-day planner

Wednesday

⚠️ fair conditions

Main blocker: Waves

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 (28 hours)
  • Tide/current (28 hours)
  • Darkness (15 hours)

Jellyfish drift risk

Drift estimate from wind, swell, current and warm water.

Low · 34/100

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.

Upcoming high tides

Next early morning high tide: Wed 22:00

Wed 10:00, Wed 22:00

Nearby alternatives in Japan

Miyako

127 km away

✅ Good

Kerama Islands

381 km away

✅ Good

Okinawa - Blue Cave

438 km away

✅ Good

Advanced forecast data

Viewing historical data

Sun 21:00 – Wed 21:00 (JST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.31 around Mon 11:00; 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 1.48m to 1.88m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 6.07 to 8.62m/s).

Tides range from 0.07m to 1.95m; 1 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
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
Mon 23:00 1.44 · high 6.76 · high 29.10 · good poor
Tue 00:00 1.42 · high 6.37 · high 29.10 · good fair
Tue 01:00 1.38 · high 6.31 · high 29.20 · good fair
Tue 02:00 1.34 · high 6.61 · high 29.20 · good poor
Tue 03:00 1.30 · high 6.40 · high 29.30 · good poor
Tue 04:00 1.28 · high 6.30 · high 29.30 · good poor
Tue 05:00 1.26 · high 6.35 · high 29.40 · good poor
Tue 06:00 1.24 · high 6.16 · high 29.40 · good poor
Tue 07:00 1.22 · high 6.10 · high 29.40 · good poor
Tue 08:00 1.22 · high 6.05 · high 29.40 · good poor
Tue 09:00 1.20 · high 5.95 · high 29.40 · good poor
Tue 10:00 1.18 · high 5.99 · high 29.40 · good poor
Tue 11:00 1.18 · high 5.63 · high 29.40 · good poor
Tue 12:00 1.16 · high 4.86 · good 29.30 · good poor
Tue 13:00 1.14 · high 5.17 · good 29.30 · good poor
Tue 14:00 1.14 · high 5.14 · good 29.30 · good poor
Tue 15:00 1.12 · high 5.51 · high 29.20 · good poor
Tue 16:00 1.12 · high 5.56 · high 29.20 · good poor
Tue 17:00 1.10 · high 5.60 · high 29.20 · good poor
Tue 18:00 1.10 · high 5.79 · high 29.10 · good poor
Tue 19:00 1.10 · high 6.00 · high 29.10 · good poor
Tue 20:00 1.10 · high 5.15 · good 29.10 · good poor
Tue 21:00 1.10 · high 5.96 · high 29.00 · good poor
Tue 22:00 1.08 · high 5.41 · high 29.00 · good poor
Tue 23:00 1.06 · high 5.20 · good 29.00 · good poor
Wed 00:00 1.04 · high 5.49 · high 29.00 · good poor
Wed 01:00 1.02 · high 4.74 · good 29.10 · good fair
Wed 02:00 1.00 · high 5.17 · good 29.10 · good poor
Wed 03:00 0.98 · high 5.55 · high 29.20 · good poor
Wed 04:00 0.96 · high 5.50 · high 29.30 · good fair
Wed 05:00 0.96 · high 5.14 · good 29.40 · good poor
Wed 06:00 0.94 · high 4.88 · good 29.40 · good poor
Wed 07:00 0.92 · high 4.49 · good 29.60 · good fair
Wed 08:00 0.92 · high 4.51 · good 29.60 · good poor
Wed 09:00 0.90 · high 4.40 · good 29.70 · good poor
Wed 10:00 0.88 · high 4.37 · good 29.70 · good poor
Wed 11:00 0.88 · high 4.30 · good 29.70 · good poor
Wed 12:00 0.86 · high 4.04 · good 29.70 · good poor
Wed 13:00 0.86 · high 4.21 · good 29.70 · good poor
Wed 14:00 0.88 · high 4.74 · good 29.60 · good poor
Wed 15:00 0.88 · high 5.24 · good 29.60 · good poor
Wed 16:00 0.92 · high 4.71 · good 29.60 · good poor
Wed 17:00 0.94 · high 5.23 · good 29.50 · good poor
Wed 18:00 0.98 · high 5.28 · good 29.50 · good poor
Wed 19:00 1.00 · high 5.63 · high 29.50 · good poor
Wed 20:00 1.02 · high 5.47 · high 29.50 · good poor