SnorkelForecast.com

Kerama Islands Snorkel Report Today

Japan · Updated Sat 05:03 (JST) · Source: Snapshot · Showing fallback/stale data

The skinny

Marginal Report Sun 15:28

Kerama Islands looks marginal today. The least-bad daylight window is around Sun 18:00, but waves is limiting the forecast.

Score: 5.4/10

Best time: Sun 18:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Sun 18:00 (Fair). Peak afternoon wind is about 2.9 m/s.

Email me when it is good

Sunrise

05:49

Sunset

19:24

Water

28.8°C

Max air

28.0°C

Sky

Clear

6% cloud

No safe window in the next 72 hours

Use the best-available section for the least-bad times.

3-day planner Best available Show data

3-day planner

Sunday

⚠️ fair conditions

Main blocker: Waves

Monday

⚠️ fair conditions

Main blocker: Waves

Tuesday

⚠️ fair conditions

Main blocker: Waves

Best available hours

  • Sun 09:00 — Fair (0.54) · still limited by waves
  • Sun 10:00 — Fair (0.53) · still limited by waves, tide/current
  • Tue 00:00 — Fair (0.52) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

  • Waves (46 hours)
  • Tide/current (44 hours)
  • Darkness (26 hours)

Jellyfish drift risk

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

Low · 34/100

Low peak drift risk around Sun 20:00.

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

Sun 13:00, Mon 14:00, Tue 02:00

Nearby alternatives in Japan

Okinawa - Blue Cave

56 km away

✅ Good

Miyako

257 km away

⚠️ Fair

Ishigaki

381 km away

⚠️ Fair

Advanced forecast data

Viewing live forecast

Sun 06:00 – Wed 06:00 (JST)

Previous day Yesterday

Snorkel Score (next 24h)

Best snorkel score is 0.54 around Sun 18:00; 11 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 0.9m to 1.04m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 2.51 to 5.07m/s).

Tides range from 0.38m to 1.74m; 1 of 24 hours are in or near peak slack windows.

72-hour forecast overview
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
fair ⚠️ Fair
fair ⚠️ Fair
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
fair ⚠️ Fair
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 and safety gate (outside daylight scores lower).
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Sun 07:00 1.04 · high 2.52 · good 28.80 · good fair
Sun 08:00 1.04 · high 2.51 · good 28.80 · good fair
Sun 09:00 1.02 · high 2.60 · good 28.70 · good fair
Sun 10:00 1.00 · high 2.85 · good 28.60 · good fair
Sun 11:00 1.00 · high 3.01 · good 28.50 · good poor
Sun 12:00 0.98 · high 3.28 · good 28.40 · good poor
Sun 13:00 0.96 · high 3.31 · good 28.40 · good poor
Sun 14:00 0.96 · high 3.22 · good 28.30 · good poor
Sun 15:00 0.94 · high 3.75 · good 28.20 · good poor
Sun 16:00 0.94 · high 3.86 · good 28.20 · good poor
Sun 17:00 0.92 · high 3.68 · good 28.10 · good poor
Sun 18:00 0.92 · high 4.00 · good 28.10 · good poor
Sun 19:00 0.92 · high 3.70 · good 28.00 · good poor
Sun 20:00 0.92 · high 4.11 · good 28.00 · good poor
Sun 21:00 0.92 · high 4.60 · good 27.90 · good poor
Sun 22:00 0.92 · high 4.08 · good 27.90 · good poor
Sun 23:00 0.90 · high 4.45 · good 27.90 · good poor
Mon 00:00 0.90 · high 4.81 · good 27.90 · good fair
Mon 01:00 0.90 · high 5.07 · good 28.00 · good fair
Mon 02:00 0.92 · high 4.40 · good 28.10 · good fair
Mon 03:00 0.92 · high 4.24 · good 28.30 · good fair
Mon 04:00 0.94 · high 4.80 · good 28.40 · good fair
Mon 05:00 0.96 · high 4.49 · good 28.50 · good fair
Mon 06:00 0.98 · high 4.37 · good 28.60 · good fair
Mon 07:00 0.98 · high 3.93 · good 28.60 · good fair
Mon 08:00 0.98 · high 3.92 · good 28.60 · good fair
Mon 09:00 0.98 · high 3.77 · good 28.60 · good fair
Mon 10:00 0.98 · high 3.46 · good 28.50 · good fair
Mon 11:00 0.96 · high 3.83 · good 28.50 · good poor
Mon 12:00 0.96 · high 3.88 · good 28.40 · good poor
Mon 13:00 0.94 · high 4.08 · good 28.40 · good poor
Mon 14:00 0.92 · high 4.07 · good 28.30 · good poor
Mon 15:00 0.90 · high 4.38 · good 28.30 · good poor
Mon 16:00 0.88 · high 4.78 · good 28.20 · good poor
Mon 17:00 0.88 · high 4.74 · good 28.20 · good poor
Mon 18:00 0.86 · high 4.32 · good 28.20 · good poor
Mon 19:00 0.84 · high 4.48 · good 28.10 · good poor
Mon 20:00 0.84 · high 4.73 · good 28.10 · good poor
Mon 21:00 0.82 · high 3.96 · good 28.10 · good poor
Mon 22:00 0.80 · high 3.27 · good 28.10 · good poor
Mon 23:00 0.80 · high 3.20 · good 28.10 · good poor
Tue 00:00 0.78 · high 2.92 · good 28.10 · good fair
Tue 01:00 0.76 · high 2.33 · good 28.20 · good fair
Tue 02:00 0.74 · high 2.16 · good 28.40 · good fair
Tue 03:00 0.72 · high 2.38 · good 28.60 · good fair
Tue 04:00 0.72 · high 2.77 · good 28.80 · good fair