SnorkelForecast.com

Jeju Island Snorkel Report Today

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

The skinny

Marginal Report Thu 05:34

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

Best morning signal: Thu 11:00 (Fair).

Best afternoon signal: Thu 14:00 (Fair). Peak afternoon wind is about 4.0 m/s.

Email me when it is good

Sunrise

05:39

Sunset

19:40

Water

27.4°C

Max air

28.8°C

Sky

Partly cloudy

39% 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

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 (31 hours)
  • Tide/current (31 hours)
  • Darkness (16 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: Thu 19:00

Thu 09:00, Thu 19:00

Nearby alternatives in South Korea

No nearby alternatives available.

Advanced forecast data

Viewing historical data

Sun 20:00 – Wed 20:00 (KST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.57 around Mon 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 0.44m to 0.5m).

Wind is at or below 5.4m/s in 10/24 sampled hours (range 1.4 to 9.0m/s).

Tides range from -0.8m to 1.33m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
poor ❌ Limited
poor ❌ Limited
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fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
poor ❌ Limited
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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 20:00 0.46 · high 4.40 · good 23.00 · good poor
Sun 21:00 0.46 · high 3.30 · good 23.00 · good poor
Sun 22:00 0.46 · high 3.70 · good 23.00 · good poor
Sun 23:00 0.46 · high 4.30 · good 23.00 · good poor
Mon 00:00 0.46 · high 6.40 · high 23.10 · good fair
Mon 01:00 0.46 · high 5.60 · high 23.30 · good fair
Mon 02:00 0.46 · high 6.50 · high 23.60 · good fair
Mon 03:00 0.46 · high 5.60 · high 23.90 · good fair
Mon 04:00 0.46 · high 6.90 · high 24.10 · good fair
Mon 05:00 0.44 · high 6.90 · high 24.40 · good fair
Mon 06:00 0.44 · high 6.50 · high 24.50 · good fair
Mon 07:00 0.44 · high 5.50 · high 24.60 · good fair
Mon 08:00 0.46 · high 5.00 · good 24.50 · good fair
Mon 09:00 0.46 · high 5.10 · good 24.50 · good fair
Mon 10:00 0.46 · high 3.90 · good 24.40 · good fair
Mon 11:00 0.46 · high 2.30 · good 24.30 · good poor
Mon 12:00 0.46 · high 1.40 · good 24.20 · good poor
Mon 13:00 0.46 · high 5.40 · good 24.10 · good poor
Mon 14:00 0.46 · high 7.00 · high 24.00 · good poor
Mon 15:00 0.46 · high 6.10 · high 23.80 · good poor
Mon 16:00 0.46 · high 6.10 · high 23.70 · good poor
Mon 17:00 0.48 · high 6.40 · high 23.60 · good poor
Mon 18:00 0.48 · high 7.90 · high 23.50 · good poor
Mon 19:00 0.50 · high 9.00 · high 23.50 · good poor
Mon 20:00 0.50 · high 8.50 · high 23.40 · good poor
Mon 21:00 0.52 · high 9.40 · high 23.40 · good poor
Mon 22:00 0.56 · high 13.20 · high 23.30 · good poor
Mon 23:00 0.58 · high 12.90 · high 23.30 · good poor
Tue 00:00 0.62 · high 12.70 · high 23.30 · good poor
Tue 01:00 0.64 · high 14.20 · high 23.30 · good poor
Tue 02:00 0.66 · high 14.50 · high 23.30 · good poor
Tue 03:00 0.68 · high 14.90 · high 23.30 · good poor
Tue 04:00 0.68 · high 14.30 · high 23.40 · good poor
Tue 05:00 0.66 · high 12.90 · high 23.40 · good poor
Tue 06:00 0.66 · high 11.00 · high 23.40 · good poor
Tue 07:00 0.66 · high 8.50 · high 23.40 · good poor
Tue 08:00 0.66 · high 7.40 · high 23.40 · good poor
Tue 09:00 0.66 · high 7.90 · high 23.40 · good poor
Tue 10:00 0.66 · high 8.10 · high 23.40 · good poor
Tue 11:00 0.66 · high 7.60 · high 23.40 · good poor
Tue 12:00 0.64 · high 9.70 · high 23.40 · good poor
Tue 13:00 0.62 · high 10.40 · high 23.40 · good poor
Tue 14:00 0.60 · high 10.50 · high 23.40 · good poor
Tue 15:00 0.58 · high 9.00 · high 23.40 · good poor
Tue 16:00 0.58 · high 8.70 · high 23.40 · good poor
Tue 17:00 0.58 · high 6.90 · high 23.40 · good poor
Tue 18:00 0.58 · high 8.30 · high 23.40 · good poor
Tue 19:00 0.74 · high 9.20 · high 23.40 · good poor
Tue 20:00 0.90 · high 9.30 · high 23.40 · good poor
Tue 21:00 1.06 · high 15.50 · high 23.50 · good poor
Tue 22:00 1.16 · high 30.60 · high 23.50 · good poor
Tue 23:00 1.28 · high 28.10 · high 23.50 · good poor
Wed 00:00 1.38 · high 22.10 · high 23.50 · good poor
Wed 01:00 1.40 · high 16.50 · high 23.60 · good poor
Wed 02:00 1.44 · high 13.50 · high 23.60 · good poor
Wed 03:00 1.46 · high 19.00 · high 23.70 · good poor
Wed 04:00 1.48 · high 13.20 · high 23.80 · good poor
Wed 05:00 1.52 · high 6.00 · high 23.80 · good poor
Wed 06:00 1.54 · high 8.00 · high 23.90 · good poor
Wed 07:00 1.50 · high 5.00 · good 23.90 · good poor
Wed 08:00 1.48 · high 6.30 · high 23.80 · good poor
Wed 09:00 1.44 · high 3.70 · good 23.80 · good poor
Wed 10:00 1.38 · high 7.50 · high 23.70 · good poor
Wed 11:00 1.34 · high 6.80 · high 23.70 · good poor
Wed 12:00 1.28 · high 6.50 · high 23.60 · good poor
Wed 13:00 1.22 · high 6.80 · high 23.60 · good poor
Wed 14:00 1.18 · high 9.70 · high 23.60 · good poor
Wed 15:00 1.12 · high 9.40 · high 23.50 · good poor
Wed 16:00 1.08 · high 9.70 · high 23.50 · good poor
Wed 17:00 1.02 · high 9.70 · high 23.50 · good poor
Wed 18:00 0.98 · high 9.30 · high 23.50 · good poor
Wed 19:00 0.96 · high 10.20 · high 23.50 · good poor