MARINE REPORT / 72 HOURS

Okinawa - Blue Cave Snorkel Report Today

Japan · Updated Mon 10:43 (JST) · Source: Snapshot

The skinny

Go in the best window Data updated Mon 10:43 (JST)

Okinawa - Blue Cave has a usable snorkeling window around Mon 14:00. The main thing to watch is waves.

Right now (forecast)

Good · 6.5/10

Mon 13:00 (JST)

Later today

Good · 6.2/10

Mon 17:00 (JST)

Next three days

Good · 6.2/10

Mon 17:00 (JST)

Model estimates using Open-Meteo; not observations or safety guarantees. Check official advisories and conditions at the beach.

Score: 6.2/10

Best time: Mon 14:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Mon 17:00 (Good). Peak afternoon wind is about 4.0 m/s.

Email me when it is good

Sunrise

06:29

Sunset

17:57

Water

28.3°C

Max air

29.1°C

Sky

Clear

1% cloud

Good model window in the next 72 hours

Next good model window: Mon 14:00–17:00 (9% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Monday

✅ Good conditions

Main blocker: Waves

Tuesday

✅ Good conditions

Main blocker: Waves

Wednesday

⚠️ Fair conditions

Main blocker: Waves

Best available hours

The next good model window starts at Mon 14:00 and lasts until 17:00.

Why this verdict

Main blockers across the next 72 hours:

  • Waves (68 hours)
  • Tide/current (57 hours)
  • Darkness (45 hours)

Jellyfish drift risk

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

Low · 31/100

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: Tue 01:00

Mon 15:00, Tue 01:00, Wed 03:00, Wed 16:00, Thu 04:00

Nearby alternatives in Japan

Kerama Islands

56 km away

⚠️ Fair

Miyako

314 km away

⚠️ Fair

Ishigaki

438 km away

⚠️ Fair

Advanced forecast data

Viewing historical data

Mon 13:00 – Thu 13:00 (JST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.73 around Tue 09:00; 10 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 0.4m to 0.48m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.35 to 3.83m/s).

Tides range from 0.0m to 1.83m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
Good 🌟 Good
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Good 🌟 Good
Good 🌟 Good
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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 is better in daylight, so night hours score lower.
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Mon 13:00 0.42 · high 1.12 · good 28.50 · good Good
Mon 14:00 0.42 · high 1.60 · good 28.60 · good Good
Mon 15:00 0.42 · high 3.83 · good 28.60 · good Fair
Mon 16:00 0.42 · high 3.69 · good 28.60 · good Fair
Mon 17:00 0.42 · high 2.15 · good 28.60 · good Good
Mon 18:00 0.42 · high 0.89 · good 28.50 · good Good
Mon 19:00 0.42 · high 1.48 · good 28.40 · good Poor
Mon 20:00 0.46 · high 1.12 · good 28.30 · good Poor
Mon 21:00 0.46 · high 1.82 · good 28.30 · good Poor
Mon 22:00 0.46 · high 2.35 · good 28.20 · good Poor
Mon 23:00 0.46 · high 2.21 · good 28.20 · good Poor
Tue 00:00 0.46 · high 1.90 · good 28.20 · good Poor
Tue 01:00 0.48 · high 1.97 · good 28.20 · good Poor
Tue 02:00 0.46 · high 1.66 · good 28.20 · good Poor
Tue 03:00 0.46 · high 1.28 · good 28.20 · good Poor
Tue 04:00 0.46 · high 1.11 · good 28.20 · good Poor
Tue 05:00 0.44 · high 0.85 · good 28.10 · good Poor
Tue 06:00 0.44 · high 0.43 · good 28.10 · good Poor
Tue 07:00 0.44 · high 0.35 · good 28.10 · good Poor
Tue 08:00 0.42 · high 1.30 · good 28.10 · good Poor
Tue 09:00 0.42 · high 2.29 · good 28.20 · good Excellent
Tue 10:00 0.42 · high 1.81 · good 28.30 · good Good
Tue 11:00 0.40 · high 1.64 · good 28.40 · good Good
Tue 12:00 0.40 · high 1.84 · good 28.50 · good Good
Tue 13:00 0.40 · high 1.76 · good 28.60 · good Good
Tue 14:00 0.38 · high 2.10 · good 28.70 · good Good
Tue 15:00 0.38 · high 2.41 · good 28.80 · good Good
Tue 16:00 0.38 · high 0.46 · good 28.80 · good Good
Tue 17:00 0.36 · good 1.00 · good 28.70 · good Good
Tue 18:00 0.36 · good 0.30 · good 28.60 · good Good
Tue 19:00 0.36 · good 0.55 · good 28.60 · good Poor
Tue 20:00 0.38 · high 0.50 · good 28.50 · good Poor
Tue 21:00 0.38 · high 0.50 · good 28.40 · good Poor
Tue 22:00 0.38 · high 0.45 · good 28.40 · good Poor
Tue 23:00 0.36 · good 0.16 · good 28.40 · good Poor
Wed 00:00 0.36 · good 0.00 · good 28.30 · good Poor
Wed 01:00 0.36 · good 0.27 · good 28.30 · good Poor
Wed 02:00 0.38 · high 0.05 · good 28.30 · good Poor
Wed 03:00 0.38 · high 0.10 · good 28.30 · good Poor
Wed 04:00 0.40 · high 1.10 · good 28.30 · good Poor
Wed 05:00 0.40 · high 2.27 · good 28.20 · good Poor
Wed 06:00 0.42 · high 2.60 · good 28.20 · good Poor
Wed 07:00 0.46 · high 3.03 · good 28.20 · good Poor
Wed 08:00 0.52 · high 4.00 · good 28.20 · good Poor
Wed 09:00 0.56 · high 5.14 · good 28.20 · good Good
Wed 10:00 0.60 · high 5.17 · good 28.20 · good Fair
Wed 11:00 0.62 · high 5.27 · good 28.20 · good Fair
Wed 12:00 0.66 · high 5.57 · high 28.30 · good Fair
Wed 13:00 0.72 · high 6.01 · high 28.30 · good Fair
Wed 14:00 0.78 · high 6.59 · high 28.30 · good Fair
Wed 15:00 0.84 · high 5.66 · high 28.30 · good Fair
Wed 16:00 0.94 · high 6.16 · high 28.30 · good Fair
Wed 17:00 1.04 · high 5.93 · high 28.30 · good Fair
Wed 18:00 1.14 · high 4.84 · good 28.30 · good Fair
Wed 19:00 1.16 · high 4.44 · good 28.30 · good Poor
Wed 20:00 1.14 · high 4.23 · good 28.20 · good Poor
Wed 21:00 1.14 · high 3.08 · good 28.20 · good Poor
Wed 22:00 1.10 · high 2.45 · good 28.20 · good Poor
Wed 23:00 1.04 · high 2.35 · good 28.20 · good Poor
Thu 00:00 1.04 · high 2.65 · good 28.20 · good Poor
Thu 01:00 1.02 · high 2.31 · good 28.20 · good Poor
Thu 02:00 1.00 · high 3.02 · good 28.10 · good Poor
Thu 03:00 0.98 · high 3.82 · good 28.10 · good Poor
Thu 04:00 1.00 · high 3.75 · good 28.10 · good Poor
Thu 05:00 1.00 · high 3.85 · good 28.10 · good Poor
Thu 06:00 1.02 · high 3.93 · good 28.10 · good Poor
Thu 07:00 1.00 · high 4.05 · good 28.10 · good Poor
Thu 08:00 1.00 · high 4.68 · good 28.10 · good Poor
Thu 09:00 0.98 · high 4.67 · good 28.10 · good Fair
Thu 10:00 0.96 · high 4.07 · good 28.10 · good Fair
Thu 11:00 0.94 · high 3.73 · good 28.10 · good Fair
Thu 12:00 0.92 · high 3.61 · good 28.10 · good Fair