MARINE REPORT / 72 HOURS

Jeju Island Snorkel Report Today

South Korea · Updated Sat 10:01 (KST) · Source: Snapshot

The skinny

Marginal Data updated Sat 10:01 (KST)

Jeju Island looks marginal today. The least-bad daylight window is around Sat 17:00, but waves is limiting the forecast.

Right now (forecast)

Fair · 3.7/10

Sat 11:00 (KST)

Later today

Fair · 3.8/10

Sat 17:00 (KST)

Next three days

Good · 5.6/10

Tue 09:00 (KST)

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

Score: 3.8/10

Best time: Sat 17:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Sat 17:00 (Fair). Peak afternoon wind is about 6.6 m/s.

Email me when it is good

Sunrise

06:39

Sunset

17:58

Water

25.3°C

Max air

24.7°C

Sky

Clear

13% cloud

Good model window in the next 72 hours

Next good model window: Tue 09:00 (1% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Saturday

⚠️ Fair conditions

Main blocker: Waves

Sunday

⚠️ Fair conditions

Main blocker: Waves

Monday

⚠️ Fair conditions

Main blocker: Waves

Best available hours

The next good model window starts at Tue 09:00.

Why this verdict

Main blockers across the next 72 hours:

  • Waves (70 hours)
  • Tide/current (63 hours)
  • Darkness (45 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: Sun 00:00

Sun 00:00, Sun 15:00, Mon 01:00, Mon 17:00, Tue 04:00

Nearby alternatives in South Korea

No nearby alternatives available.

Advanced forecast data

Viewing historical data

Fri 11:00 – Mon 11:00 (KST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.54 around Fri 17:00; 8 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.

1/24 sampled hours stay at or below 0.36m (range 0.36m to 0.98m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 2.58 to 5.21m/s).

Tides range from -0.4m to 1.0m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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
Poor ❌ Limited
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
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
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
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
Poor ❌ Limited
Poor ❌ Limited
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
Fri 11:00 0.36 · good 2.94 · good 25.50 · good Fair
Fri 12:00 0.38 · high 2.93 · good 25.50 · good Fair
Fri 13:00 0.38 · high 4.75 · good 25.50 · good Fair
Fri 14:00 0.38 · high 4.49 · good 25.50 · good Fair
Fri 15:00 0.38 · high 4.12 · good 25.50 · good Fair
Fri 16:00 0.40 · high 3.16 · good 25.50 · good Fair
Fri 17:00 0.40 · high 3.09 · good 25.50 · good Fair
Fri 18:00 0.42 · high 2.96 · good 25.50 · good Poor
Fri 19:00 0.44 · high 2.84 · good 25.50 · good Poor
Fri 20:00 0.48 · high 2.61 · good 25.50 · good Poor
Fri 21:00 0.48 · high 2.70 · good 25.50 · good Poor
Fri 22:00 0.50 · high 2.64 · good 25.50 · good Poor
Fri 23:00 0.52 · high 2.58 · good 25.50 · good Poor
Sat 00:00 0.54 · high 2.93 · good 25.50 · good Poor
Sat 01:00 0.58 · high 2.94 · good 25.50 · good Poor
Sat 02:00 0.60 · high 3.22 · good 25.50 · good Poor
Sat 03:00 0.64 · high 3.12 · good 25.50 · good Poor
Sat 04:00 0.68 · high 3.12 · good 25.50 · good Poor
Sat 05:00 0.70 · high 3.16 · good 25.50 · good Poor
Sat 06:00 0.84 · high 3.34 · good 25.40 · good Poor
Sat 07:00 0.88 · high 3.33 · good 25.40 · good Poor
Sat 08:00 0.94 · high 4.14 · good 25.40 · good Poor
Sat 09:00 0.98 · high 5.10 · good 25.40 · good Fair
Sat 10:00 0.98 · high 5.21 · good 25.40 · good Poor
Sat 11:00 0.98 · high 5.17 · good 25.50 · good Poor
Sat 12:00 0.98 · high 5.55 · high 25.50 · good Fair
Sat 13:00 0.96 · high 5.26 · good 25.50 · good Fair
Sat 14:00 0.94 · high 4.85 · good 25.50 · good Fair
Sat 15:00 0.92 · high 4.67 · good 25.50 · good Fair
Sat 16:00 0.94 · high 4.45 · good 25.50 · good Fair
Sat 17:00 0.94 · high 3.87 · good 25.50 · good Fair
Sat 18:00 1.02 · high 2.78 · good 25.50 · good Poor
Sat 19:00 1.06 · high 2.69 · good 25.50 · good Poor
Sat 20:00 1.10 · high 3.14 · good 25.40 · good Poor
Sat 21:00 1.14 · high 3.43 · good 25.40 · good Poor
Sat 22:00 1.20 · high 3.54 · good 25.40 · good Poor
Sat 23:00 1.26 · high 4.27 · good 25.40 · good Poor
Sun 00:00 1.32 · high 4.16 · good 25.40 · good Poor
Sun 01:00 1.38 · high 4.65 · good 25.40 · good Poor
Sun 02:00 1.46 · high 4.05 · good 25.40 · good Poor
Sun 03:00 1.52 · high 4.71 · good 25.40 · good Poor
Sun 04:00 1.54 · high 4.72 · good 25.40 · good Poor
Sun 05:00 1.56 · high 5.37 · good 25.40 · good Poor
Sun 06:00 1.58 · high 5.36 · good 25.40 · good Poor
Sun 07:00 1.64 · high 5.15 · good 25.40 · good Poor
Sun 08:00 1.64 · high 5.24 · good 25.40 · good Poor
Sun 09:00 1.66 · high 5.68 · high 25.40 · good Poor
Sun 10:00 1.64 · high 6.16 · high 25.40 · good Poor
Sun 11:00 1.64 · high 5.86 · high 25.40 · good Poor
Sun 12:00 1.62 · high 6.53 · high 25.40 · good Poor
Sun 13:00 1.60 · high 3.76 · good 25.40 · good Fair
Sun 14:00 1.60 · high 3.80 · good 25.40 · good Fair
Sun 15:00 1.58 · high 2.91 · good 25.40 · good Fair
Sun 16:00 1.58 · high 4.74 · good 25.40 · good Fair
Sun 17:00 1.56 · high 4.92 · good 25.40 · good Fair
Sun 18:00 1.56 · high 4.37 · good 25.40 · good Poor
Sun 19:00 1.48 · high 4.67 · good 25.20 · good Poor
Sun 20:00 1.48 · high 4.64 · good 25.20 · good Poor
Sun 21:00 1.46 · high 4.88 · good 25.20 · good Poor
Sun 22:00 1.46 · high 5.10 · good 25.20 · good Poor
Sun 23:00 1.46 · high 2.33 · good 25.20 · good Poor
Mon 00:00 1.46 · high 2.64 · good 25.10 · good Poor
Mon 01:00 1.44 · high 3.33 · good 25.10 · good Poor
Mon 02:00 1.42 · high 4.38 · good 25.10 · good Poor
Mon 03:00 1.40 · high 5.05 · good 25.10 · good Poor
Mon 04:00 1.36 · high 5.53 · high 25.10 · good Poor
Mon 05:00 1.30 · high 4.73 · good 25.10 · good Poor
Mon 06:00 1.26 · high 4.51 · good 25.10 · good Poor
Mon 07:00 1.20 · high 5.14 · good 25.10 · good Poor
Mon 08:00 1.22 · high 4.68 · good 25.10 · good Poor
Mon 09:00 1.16 · high 4.83 · good 25.10 · good Poor
Mon 10:00 1.12 · high 5.56 · high 25.20 · good Fair