SnorkelForecast.com

Jeju Island Snorkel Report Today

South Korea · Updated Tue 04:16 (KST) · Source: Snapshot

The skinny

Marginal Report Wed 09:50

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

Score: 4.7/10

Best time: Thu 14:00

Main risk: Waves

Best morning signal: Wed 10:00 (Fair).

Best afternoon signal: Wed 12:00 (Fair). Peak afternoon wind is about 3.9 m/s.

Email me when it is good

Sunrise

05:39

Sunset

19:40

Water

27.5°C

Max air

28.5°C

Sky

Partly cloudy

34% 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

⚠️ fair 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 (51 hours)
  • Tide/current (51 hours)
  • Darkness (26 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 07:00, 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 00:00 – Tue 00:00 (KST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.34 around Sat 18:00; 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 2.5m to 3.12m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 3.44 to 5.03m/s).

Tides range from -0.68m to 1.34m; 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
Sat 00:00 2.50 · high 4.48 · good 25.60 · good poor
Sat 01:00 2.56 · high 4.87 · good 25.70 · good poor
Sat 02:00 2.64 · high 5.00 · good 25.80 · good poor
Sat 03:00 2.70 · high 5.00 · good 25.90 · good poor
Sat 04:00 2.76 · high 5.03 · good 25.90 · good poor
Sat 05:00 2.82 · high 4.84 · good 26.00 · good poor
Sat 06:00 2.88 · high 4.81 · good 26.10 · good poor
Sat 07:00 2.92 · high 4.88 · good 26.10 · good poor
Sat 08:00 2.94 · high 4.85 · good 26.10 · good poor
Sat 09:00 2.98 · high 4.74 · good 26.10 · good poor
Sat 10:00 2.98 · high 4.61 · good 26.10 · good poor
Sat 11:00 3.00 · high 4.43 · good 26.10 · good poor
Sat 12:00 3.00 · high 4.79 · good 26.10 · good poor
Sat 13:00 3.02 · high 4.79 · good 26.10 · good poor
Sat 14:00 3.06 · high 4.40 · good 26.00 · good poor
Sat 15:00 3.08 · high 4.12 · good 26.00 · good poor
Sat 16:00 3.10 · high 3.85 · good 26.00 · good poor
Sat 17:00 3.10 · high 3.64 · good 26.00 · good poor
Sat 18:00 3.12 · high 3.69 · good 26.00 · good poor
Sat 19:00 3.12 · high 3.83 · good 26.00 · good poor
Sat 20:00 3.10 · high 3.86 · good 25.90 · good poor
Sat 21:00 3.10 · high 3.79 · good 25.90 · good poor
Sat 22:00 3.12 · high 3.75 · good 25.90 · good poor
Sat 23:00 3.12 · high 3.44 · good 25.90 · good poor
Sun 00:00 3.14 · high 3.01 · good 26.00 · good poor
Sun 01:00 3.12 · high 3.01 · good 26.10 · good poor
Sun 02:00 3.12 · high 2.86 · good 26.30 · good poor
Sun 03:00 3.10 · high 2.84 · good 26.60 · good poor
Sun 04:00 3.06 · high 2.75 · good 26.80 · good fair
Sun 05:00 3.04 · high 2.38 · good 27.00 · good fair
Sun 06:00 3.00 · high 2.05 · good 27.10 · good fair
Sun 07:00 2.94 · high 1.48 · good 27.20 · good fair
Sun 08:00 3.28 · high 2.88 · good 26.00 · good fair
Sun 09:00 3.22 · high 2.06 · good 26.00 · good fair
Sun 10:00 3.18 · high 1.68 · good 25.90 · good fair
Sun 11:00 3.14 · high 1.53 · good 25.90 · good poor
Sun 12:00 3.10 · high 1.82 · good 25.90 · good poor
Sun 13:00 3.06 · high 1.53 · good 25.80 · good poor
Sun 14:00 3.04 · high 1.02 · good 25.80 · good poor
Sun 15:00 3.00 · high 0.89 · good 25.80 · good poor
Sun 16:00 2.96 · high 1.22 · good 25.70 · good poor
Sun 17:00 2.94 · high 1.97 · good 25.70 · good poor
Sun 18:00 2.90 · high 1.84 · good 25.70 · good poor
Sun 19:00 2.84 · high 1.97 · good 25.70 · good poor
Sun 20:00 2.78 · high 2.10 · good 25.60 · good poor
Sun 21:00 2.72 · high 2.15 · good 25.60 · good poor
Sun 22:00 2.66 · high 2.33 · good 25.60 · good poor
Sun 23:00 2.60 · high 2.53 · good 25.60 · good poor
Mon 00:00 2.54 · high 2.33 · good 25.70 · good fair
Mon 01:00 2.48 · high 2.45 · good 25.70 · good fair
Mon 02:00 2.44 · high 2.55 · good 25.80 · good fair
Mon 03:00 2.38 · high 2.61 · good 25.90 · good fair
Mon 04:00 2.36 · high 2.30 · good 26.00 · good fair
Mon 05:00 2.32 · high 2.31 · good 26.10 · good fair
Mon 06:00 2.30 · high 2.11 · good 26.10 · good fair
Mon 07:00 2.28 · high 2.12 · good 26.10 · good fair
Mon 08:00 2.28 · high 2.14 · good 26.10 · good fair
Mon 09:00 2.26 · high 1.71 · good 26.10 · good fair
Mon 10:00 2.24 · high 1.10 · good 26.00 · good fair
Mon 11:00 2.22 · high 0.81 · good 25.90 · good poor
Mon 12:00 2.20 · high 0.72 · good 25.90 · good poor
Mon 13:00 2.20 · high 0.50 · good 25.80 · good poor
Mon 14:00 2.18 · high 0.98 · good 25.80 · good poor
Mon 15:00 2.18 · high 1.62 · good 25.70 · good poor
Mon 16:00 2.16 · high 1.97 · good 25.60 · good poor
Mon 17:00 2.14 · high 2.02 · good 25.60 · good poor
Mon 18:00 2.12 · high 1.97 · good 25.50 · good poor
Mon 19:00 2.10 · high 2.40 · good 25.50 · good poor
Mon 20:00 2.06 · high 2.33 · good 25.40 · good poor
Mon 21:00 2.04 · high 2.19 · good 25.40 · good poor
Mon 22:00 2.02 · high 2.62 · good 25.40 · good poor
Mon 23:00 2.02 · high 2.98 · good 25.40 · good poor