MARINE REPORT / 72 HOURS

Jeju Island Snorkel Report Today

South Korea · Updated Sat 16:15 (KST) · Source: Snapshot

The skinny

Marginal Data updated Sat 16:15 (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)

Poor · 3.4/10

Sat 16:00 (KST)

Later today

Fair · 3.9/10

Sat 17:00 (KST)

Next three days

Good · 6.7/10

Tue 13:00 (KST)

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

Score: 3.9/10

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 5.4 m/s.

Email me when it is good

Sunrise

06:39

Sunset

17:58

Water

25.3°C

Max air

23.5°C

Sky

Clear

19% cloud

Good model window in the next 72 hours

Next good model window: Tue 09:00–15:00 (10% 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 and lasts until 15:00.

Why this verdict

Main blockers across the next 72 hours:

  • Waves (71 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

Sat 16:00 – Tue 16:00 (KST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.43 around Sat 18:00; 4 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 0.6m to 1.32m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 2.08 to 4.53m/s).

Tides range from -0.78m to 1.59m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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
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
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
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
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
Sat 16:00 0.94 · high 3.42 · good 26.50 · good Fair
Sat 17:00 1.06 · high 3.51 · good 26.50 · good Fair
Sat 18:00 1.18 · high 3.10 · good 26.40 · good Fair
Sat 19:00 1.20 · high 2.21 · good 26.40 · good Poor
Sat 20:00 0.60 · high 2.30 · good 26.20 · good Poor
Sat 21:00 0.66 · high 3.34 · good 26.20 · good Poor
Sat 22:00 0.76 · high 2.57 · good 26.20 · good Poor
Sat 23:00 0.86 · high 2.08 · good 26.20 · good Poor
Sun 00:00 0.96 · high 3.14 · good 26.10 · good Poor
Sun 01:00 1.24 · high 4.53 · good 26.10 · good Poor
Sun 02:00 1.28 · high 4.22 · good 26.10 · good Poor
Sun 03:00 1.32 · high 3.86 · good 26.10 · good Poor
Sun 04:00 1.30 · high 3.65 · good 26.10 · good Poor
Sun 05:00 1.26 · high 3.31 · good 26.10 · good Poor
Sun 06:00 1.24 · high 3.81 · good 26.10 · good Poor
Sun 07:00 1.22 · high 3.95 · good 26.10 · good Poor
Sun 08:00 1.18 · high 4.27 · good 26.10 · good Poor
Sun 09:00 1.16 · high 2.91 · good 26.10 · good Poor
Sun 10:00 1.14 · high 3.30 · good 26.10 · good Poor
Sun 11:00 1.10 · high 3.43 · good 26.20 · good Poor
Sun 12:00 1.08 · high 3.22 · good 26.20 · good Poor
Sun 13:00 1.06 · high 3.53 · good 26.20 · good Fair
Sun 14:00 1.04 · high 3.45 · good 26.30 · good Poor
Sun 15:00 1.02 · high 3.26 · good 26.30 · good Poor
Sun 16:00 1.02 · high 3.80 · good 26.30 · good Poor
Sun 17:00 1.02 · high 3.24 · good 26.30 · good Poor
Sun 18:00 1.02 · high 2.89 · good 26.20 · good Fair
Sun 19:00 1.02 · high 3.32 · good 26.20 · good Poor
Sun 20:00 1.08 · high 2.97 · good 25.80 · good Poor
Sun 21:00 1.08 · high 2.93 · good 25.80 · good Poor
Sun 22:00 1.08 · high 3.22 · good 25.80 · good Poor
Sun 23:00 1.06 · high 3.18 · good 25.80 · good Poor
Mon 00:00 1.06 · high 2.90 · good 25.80 · good Poor
Mon 01:00 1.04 · high 2.40 · good 25.80 · good Poor
Mon 02:00 1.02 · high 2.21 · good 25.80 · good Poor
Mon 03:00 0.98 · high 1.87 · good 25.80 · good Poor
Mon 04:00 0.98 · high 1.35 · good 25.80 · good Poor
Mon 05:00 0.96 · high 2.10 · good 25.80 · good Poor
Mon 06:00 0.96 · high 2.93 · good 25.70 · good Poor
Mon 07:00 0.94 · high 2.40 · good 25.70 · good Poor
Mon 08:00 0.92 · high 2.53 · good 25.70 · good Poor
Mon 09:00 0.90 · high 3.00 · good 25.80 · good Poor
Mon 10:00 0.90 · high 3.41 · good 25.80 · good Poor
Mon 11:00 0.88 · high 2.93 · good 25.90 · good Poor
Mon 12:00 0.88 · high 2.91 · good 26.10 · good Poor
Mon 13:00 0.88 · high 1.99 · good 26.20 · good Fair
Mon 14:00 0.86 · high 1.89 · good 26.30 · good Fair
Mon 15:00 0.86 · high 1.27 · good 26.30 · good Fair
Mon 16:00 0.86 · high 3.13 · good 26.30 · good Poor
Mon 17:00 0.84 · high 2.85 · good 26.30 · good Poor
Mon 18:00 0.84 · high 2.39 · good 26.20 · good Poor
Mon 19:00 0.82 · high 1.81 · good 26.20 · good Poor
Mon 20:00 0.86 · high 2.30 · good 26.10 · good Poor
Mon 21:00 0.86 · high 2.56 · good 25.70 · good Poor
Mon 22:00 0.84 · high 1.45 · good 25.70 · good Poor
Mon 23:00 0.84 · high 1.81 · good 25.70 · good Poor
Tue 00:00 0.82 · high 1.90 · good 25.70 · good Poor
Tue 01:00 0.74 · high 1.14 · good 25.70 · good Poor
Tue 02:00 0.72 · high 0.95 · good 25.70 · good Poor
Tue 03:00 0.72 · high 0.56 · good 25.70 · good Poor
Tue 04:00 0.72 · high 0.00 · good 25.70 · good Poor
Tue 05:00 0.70 · high 0.51 · good 25.60 · good Poor
Tue 06:00 0.70 · high 0.76 · good 25.60 · good Poor
Tue 07:00 0.68 · high 0.74 · good 25.60 · good Poor
Tue 08:00 0.68 · high 1.23 · good 25.60 · good Poor
Tue 09:00 0.66 · high 1.75 · good 25.60 · good Fair
Tue 10:00 0.66 · high 2.55 · good 25.70 · good Fair
Tue 11:00 0.66 · high 2.93 · good 25.80 · good Fair
Tue 12:00 0.66 · high 3.17 · good 25.90 · good Fair
Tue 13:00 0.68 · high 0.64 · good 26.00 · good Fair
Tue 14:00 0.68 · high 2.02 · good 26.00 · good Fair
Tue 15:00 0.70 · high 1.00 · good 26.10 · good Fair