SnorkelForecast.com

Jeju Island Snorkel Report Today

South Korea · Updated Tue 04:16 (KST) · Source: Snapshot · Showing fallback/stale data

The skinny

Marginal Report Wed 21:44

Jeju Island looks marginal today. The least-bad daylight window is around Thu 14:00, but waves is limiting the forecast.

Score: 5.1/10

Best time: Thu 14:00

Main risk: Waves

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

05:39

Sunset

19:40

Water

27.9°C

Max air

26.3°C

Sky

Clear

18% 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

Wednesday

❌ poor conditions

Main blocker: Waves

Thursday

⚠️ fair conditions

Main blocker: Waves

Friday

⚠️ fair conditions

Main blocker: Waves

Best available hours

  • Thu 05:00 — Fair (0.51) · still limited by waves, tide/current
  • Thu 06:00 — Fair (0.50) · still limited by waves, tide/current
  • Fri 03:00 — Fair (0.50) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

  • Waves (39 hours)
  • Tide/current (39 hours)
  • Darkness (24 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 18:00

Wed 18:00, Thu 09:00, Thu 19:00

Nearby alternatives in South Korea

No nearby alternatives available.

Advanced forecast data

Viewing historical data

Sat 12:00 – Tue 12:00 (KST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.37 around Sun 10:00; 2 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 0.8m to 0.98m).

Wind is at or below 5.4m/s in 10/24 sampled hours (range 1.5 to 13.9m/s).

Tides range from -0.53m to 1.31m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
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
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
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
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
Sat 12:00 0.94 · high 13.90 · high 23.80 · good poor
Sat 13:00 0.94 · high 11.90 · high 23.80 · good poor
Sat 14:00 0.94 · high 11.30 · high 23.80 · good poor
Sat 15:00 0.94 · high 9.80 · high 23.70 · good poor
Sat 16:00 0.94 · high 8.70 · high 23.70 · good poor
Sat 17:00 0.92 · high 8.30 · high 23.70 · good poor
Sat 18:00 0.92 · high 5.80 · high 23.70 · good poor
Sat 19:00 0.92 · high 5.00 · good 23.70 · good poor
Sat 20:00 0.90 · high 2.90 · good 23.70 · good poor
Sat 21:00 0.90 · high 1.50 · good 23.70 · good poor
Sat 22:00 0.88 · high 3.60 · good 23.70 · good poor
Sat 23:00 0.84 · high 2.90 · good 23.70 · good poor
Sun 00:00 0.82 · high 2.50 · good 23.70 · good poor
Sun 01:00 0.82 · high 4.40 · good 23.80 · good fair
Sun 02:00 0.80 · high 6.70 · high 23.80 · good poor
Sun 03:00 0.80 · high 7.60 · high 23.80 · good poor
Sun 04:00 0.82 · high 7.30 · high 23.90 · good poor
Sun 05:00 0.84 · high 9.40 · high 23.90 · good poor
Sun 06:00 0.86 · high 9.70 · high 23.90 · good poor
Sun 07:00 0.88 · high 8.80 · high 23.90 · good poor
Sun 08:00 0.88 · high 5.90 · high 23.90 · good poor
Sun 09:00 0.90 · high 4.10 · good 23.90 · good fair
Sun 10:00 0.94 · high 4.40 · good 23.90 · good poor
Sun 11:00 0.98 · high 2.70 · good 23.90 · good poor
Sun 12:00 1.02 · high 2.40 · good 23.90 · good poor
Sun 13:00 1.06 · high 4.00 · good 23.90 · good poor
Sun 14:00 1.10 · high 7.40 · high 23.80 · good poor
Sun 15:00 1.14 · high 11.80 · high 23.80 · good poor
Sun 16:00 1.14 · high 13.40 · high 23.80 · good poor
Sun 17:00 1.16 · high 14.50 · high 23.70 · good poor
Sun 18:00 1.16 · high 14.60 · high 23.70 · good poor
Sun 19:00 1.16 · high 14.10 · high 23.70 · good poor
Sun 20:00 1.16 · high 12.00 · high 23.70 · good poor
Sun 21:00 1.16 · high 10.10 · high 23.60 · good poor
Sun 22:00 1.16 · high 8.80 · high 23.60 · good poor
Sun 23:00 1.16 · high 8.80 · high 23.60 · good poor
Mon 00:00 1.16 · high 9.90 · high 23.60 · good poor
Mon 01:00 1.20 · high 10.80 · high 23.70 · good poor
Mon 02:00 1.22 · high 11.60 · high 23.80 · good poor
Mon 03:00 1.26 · high 12.10 · high 23.90 · good poor
Mon 04:00 1.26 · high 14.00 · high 24.00 · good poor
Mon 05:00 1.28 · high 14.70 · high 24.10 · good poor
Mon 06:00 1.28 · high 15.60 · high 24.10 · good poor
Mon 07:00 1.28 · high 15.90 · high 24.20 · good poor
Mon 08:00 1.26 · high 16.20 · high 24.20 · good poor
Mon 09:00 1.26 · high 14.10 · high 24.30 · good poor
Mon 10:00 1.14 · high 2.00 · good 24.30 · good fair
Mon 11:00 1.12 · high 1.63 · good 24.30 · good poor
Mon 12:00 1.12 · high 1.53 · good 24.30 · good poor
Mon 13:00 1.10 · high 1.55 · good 24.30 · good poor
Mon 14:00 1.08 · high 2.10 · good 24.20 · good poor
Mon 15:00 1.06 · high 2.24 · good 24.20 · good poor
Mon 16:00 1.04 · high 2.33 · good 24.20 · good poor
Mon 17:00 1.00 · high 2.21 · good 24.10 · good poor
Mon 18:00 0.98 · high 2.40 · good 24.10 · good poor
Mon 19:00 0.98 · high 2.40 · good 24.10 · good poor
Mon 20:00 0.96 · high 2.40 · good 24.10 · good poor
Mon 21:00 0.96 · high 2.16 · good 24.10 · good poor
Mon 22:00 0.94 · high 2.11 · good 24.10 · good poor
Mon 23:00 0.92 · high 2.33 · good 24.20 · good poor
Tue 00:00 0.90 · high 2.61 · good 24.30 · good fair
Tue 01:00 0.88 · high 2.80 · good 24.50 · good fair
Tue 02:00 0.88 · high 2.92 · good 24.70 · good fair
Tue 03:00 0.86 · high 3.16 · good 25.00 · good fair
Tue 04:00 0.88 · high 3.41 · good 25.30 · good fair
Tue 05:00 0.88 · high 3.30 · good 25.60 · good fair
Tue 06:00 0.90 · high 3.19 · good 25.70 · good fair
Tue 07:00 0.90 · high 2.70 · good 25.80 · good fair
Tue 08:00 0.90 · high 2.34 · good 25.90 · good fair
Tue 09:00 0.90 · high 1.91 · good 25.90 · good fair
Tue 10:00 0.92 · high 1.52 · good 25.80 · good fair
Tue 11:00 0.92 · high 1.20 · good 25.80 · good poor