MARINE REPORT / 72 HOURS

Jeju Island Snorkel Report Today

South Korea · Updated Sun 02:21 (KST) · Source: Snapshot

The skinny

Marginal Data updated Sun 02:21 (KST)

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

Right now (forecast)

Poor · 0.0/10

Sun 05:00 (KST)

Later today

Fair · 4.4/10

Sun 17:00 (KST)

Next three days

Good · 6.1/10

Tue 09:00 (KST)

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

Score: 4.4/10

Best time: Sun 17:00

Main risk: Waves

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

Best afternoon signal: Sun 17:00 (Fair). Peak afternoon wind is about 4.4 m/s.

Email me when it is good

Sunrise

06:39

Sunset

17:58

Water

25.2°C

Max air

25.4°C

Sky

Partly cloudy

51% cloud

Good model window in the next 72 hours

Next good model window: Tue 09:00–13:00 (7% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Sunday

⚠️ Fair conditions

Main blocker: Waves

Monday

⚠️ Fair conditions

Main blocker: Waves

Tuesday

✅ Good conditions

Main blocker: Waves

Best available hours

The next good model window starts at Tue 09:00 and lasts until 13:00.

Why this verdict

Main blockers across the next 72 hours:

  • Waves (68 hours)
  • Tide/current (60 hours)
  • Darkness (41 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: Mon 01:00

Sun 15:00, Mon 01:00, Mon 17:00, Tue 04:00, Tue 18:00

Nearby alternatives in South Korea

No nearby alternatives available.

Advanced forecast data

Viewing historical data

Thu 05:00 – Sun 05:00 (KST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.68 around Thu 09:00; 10 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.

3/24 sampled hours stay at or below 0.36m (range 0.36m to 0.52m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.28 to 2.7m/s).

Tides range from -0.82m to 1.45m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Fair ⚠️ Fair
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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
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
Thu 05:00 0.38 · high 0.32 · good 26.80 · good Poor
Thu 06:00 0.38 · high 0.38 · good 26.80 · good Poor
Thu 07:00 0.38 · high 0.35 · good 26.80 · good Poor
Thu 08:00 0.36 · good 0.78 · good 26.80 · good Poor
Thu 09:00 0.36 · good 0.85 · good 26.80 · good Good
Thu 10:00 0.36 · good 0.75 · good 26.90 · good Good
Thu 11:00 0.38 · high 0.46 · good 27.00 · good Good
Thu 12:00 0.38 · high 0.34 · good 27.10 · good Good
Thu 13:00 0.40 · high 1.32 · good 27.20 · good Good
Thu 14:00 0.44 · high 1.32 · good 27.30 · good Good
Thu 15:00 0.46 · high 1.70 · good 27.30 · good Good
Thu 16:00 0.48 · high 0.28 · good 27.30 · good Fair
Thu 17:00 0.50 · high 0.75 · good 27.20 · good Fair
Thu 18:00 0.52 · high 0.97 · good 27.10 · good Fair
Thu 19:00 0.52 · high 1.29 · good 27.00 · good Poor
Thu 20:00 0.48 · high 1.63 · good 26.90 · good Poor
Thu 21:00 0.48 · high 1.47 · good 26.80 · good Poor
Thu 22:00 0.48 · high 1.52 · good 26.80 · good Poor
Thu 23:00 0.50 · high 1.75 · good 26.80 · good Poor
Fri 00:00 0.50 · high 1.89 · good 26.80 · good Poor
Fri 01:00 0.46 · high 2.70 · good 26.80 · good Poor
Fri 02:00 0.46 · high 2.57 · good 26.80 · good Poor
Fri 03:00 0.46 · high 2.31 · good 26.80 · good Poor
Fri 04:00 0.46 · high 1.71 · good 26.80 · good Poor
Fri 05:00 0.46 · high 1.71 · good 26.80 · good Poor
Fri 06:00 0.46 · high 1.70 · good 26.80 · good Poor
Fri 07:00 0.46 · high 1.86 · good 26.80 · good Poor
Fri 08:00 0.46 · high 2.25 · good 26.80 · good Poor
Fri 09:00 0.46 · high 2.57 · good 26.80 · good Fair
Fri 10:00 0.46 · high 2.47 · good 26.80 · good Good
Fri 11:00 0.48 · high 1.82 · good 26.80 · good Good
Fri 12:00 0.48 · high 1.23 · good 26.80 · good Good
Fri 13:00 0.50 · high 0.40 · good 26.90 · good Good
Fri 14:00 0.54 · high 1.17 · good 26.90 · good Good
Fri 15:00 0.56 · high 1.87 · good 26.90 · good Fair
Fri 16:00 0.58 · high 0.21 · good 26.90 · good Fair
Fri 17:00 0.60 · high 0.36 · good 26.90 · good Fair
Fri 18:00 0.62 · high 0.15 · good 26.80 · good Fair
Fri 19:00 0.60 · high 0.11 · good 26.80 · good Poor
Fri 20:00 0.50 · high 0.25 · good 26.80 · good Poor
Fri 21:00 0.48 · high 0.45 · good 26.80 · good Poor
Fri 22:00 0.46 · high 0.46 · good 26.80 · good Poor
Fri 23:00 0.46 · high 0.43 · good 26.80 · good Poor
Sat 00:00 0.44 · high 2.42 · good 26.80 · good Poor
Sat 01:00 0.42 · high 2.45 · good 26.80 · good Poor
Sat 02:00 0.40 · high 2.50 · good 26.80 · good Poor
Sat 03:00 0.42 · high 1.64 · good 26.80 · good Poor
Sat 04:00 0.44 · high 1.35 · good 26.80 · good Poor
Sat 05:00 0.44 · high 1.57 · good 26.80 · good Poor
Sat 06:00 0.46 · high 1.77 · good 26.70 · good Poor
Sat 07:00 0.52 · high 1.90 · good 26.70 · good Poor
Sat 08:00 0.56 · high 2.71 · good 26.70 · good Poor
Sat 09:00 0.62 · high 3.73 · good 26.70 · good Fair
Sat 10:00 0.66 · high 3.91 · good 26.70 · good Fair
Sat 11:00 0.72 · high 4.21 · good 26.70 · good Fair
Sat 12:00 0.76 · high 3.76 · good 26.70 · good Poor
Sat 13:00 0.76 · high 3.56 · good 26.70 · good Poor
Sat 14:00 0.76 · high 4.43 · good 26.70 · good Poor
Sat 15:00 0.76 · high 4.66 · good 26.70 · good Poor
Sat 16:00 0.74 · high 3.15 · good 26.70 · good Fair
Sat 17:00 0.74 · high 2.51 · good 26.70 · good Poor
Sat 18:00 0.72 · high 1.84 · good 26.70 · good Poor
Sat 19:00 0.70 · high 1.77 · good 26.70 · good Poor
Sat 20:00 0.68 · high 2.95 · good 26.70 · good Poor
Sat 21:00 0.66 · high 3.42 · good 26.70 · good Poor
Sat 22:00 0.68 · high 3.05 · good 26.70 · good Poor
Sat 23:00 0.70 · high 3.09 · good 26.70 · good Poor
Sun 00:00 0.72 · high 2.80 · good 26.60 · good Poor
Sun 01:00 1.12 · high 3.01 · good 26.60 · good Poor
Sun 02:00 1.10 · high 3.10 · good 26.60 · good Poor
Sun 03:00 1.06 · high 2.99 · good 26.60 · good Poor
Sun 04:00 1.02 · high 2.71 · good 26.60 · good Poor