Can you snorkel in Jeju Island today?

Conditions look marginal right now — no clearly safe snorkeling window is forecast in Jeju Island over the next 72 hours. Check the hourly table for the calmest period.

What is the best time of day to snorkel in Jeju Island?

Snorkel during daylight, ideally in the morning before the wind picks up, and around high slack tide when water is clearest and currents are weakest. SnorkelForecast scores every daylight hour in Jeju Island so you can pick the calmest window.

What is the best tide for snorkeling?

High slack tide — within about an hour of the high-tide peak when currents are weakest — is the safest, clearest window. Strong low tides, strong tidal flow near channels or headlands, and large tidal-range days reduce score.

Jeju Island Snorkel Report Today

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

The skinny

Marginal Report Thu 07:50

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

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

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 (29 hours)
Tide/current (29 hours)
Darkness (14 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

Fri 22:00 – Mon 22:00 (KST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.03 around Sat 19:00; 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 0.64m to 1.12m).

Wind is at or below 5.4m/s in 10/24 sampled hours (range 0.5 to 18.4m/s).

Tides range from -0.59m to 1.21m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview

Fri 22:00 poor ❌ Limited

Fri 23:00 poor ❌ Limited

Sat 00:00 poor ❌ Limited

Sat 01:00 poor ❌ Limited

Sat 02:00 poor ❌ Limited

Sat 03:00 poor ❌ Limited

Sat 04:00 poor ❌ Limited

Sat 05:00 poor ❌ Limited

Sat 06:00 poor ❌ Limited

Sat 07:00 poor ❌ Limited

Sat 08:00 poor ❌ Limited

Sat 09:00 poor ❌ Limited

Sat 10:00 poor ❌ Limited

Sat 11:00 poor ❌ Limited

Sat 12:00 poor ❌ Limited

Sat 13:00 poor ❌ Limited

Sat 14:00 poor ❌ Limited

Sat 15:00 poor ❌ Limited

Sat 16:00 poor ❌ Limited

Sat 17:00 poor ❌ Limited

Sat 18:00 poor ❌ Limited

Sat 19:00 poor ❌ Limited

Sat 20:00 poor ❌ Limited

Sat 21:00 poor ❌ Limited

Sat 22:00 poor ❌ Limited

Sat 23:00 poor ❌ Limited

Sun 00:00 poor ❌ Limited

Sun 01:00 fair ⚠️ Fair

Sun 02:00 poor ❌ Limited

Sun 03:00 poor ❌ Limited

Sun 04:00 poor ❌ Limited

Sun 05:00 poor ❌ Limited

Sun 06:00 poor ❌ Limited

Sun 07:00 poor ❌ Limited

Sun 08:00 poor ❌ Limited

Sun 09:00 poor ❌ Limited

Sun 10:00 fair ⚠️ Fair

Sun 11:00 poor ❌ Limited

Sun 12:00 poor ❌ Limited

Sun 13:00 poor ❌ Limited

Sun 14:00 poor ❌ Limited

Sun 15:00 poor ❌ Limited

Sun 16:00 poor ❌ Limited

Sun 17:00 poor ❌ Limited

Sun 18:00 poor ❌ Limited

Sun 19:00 poor ❌ Limited

Sun 20:00 poor ❌ Limited

Sun 21:00 poor ❌ Limited

Sun 22:00 poor ❌ Limited

Sun 23:00 poor ❌ Limited

Mon 00:00 fair ⚠️ Fair

Mon 01:00 fair ⚠️ Fair

Mon 02:00 fair ⚠️ Fair

Mon 03:00 fair ⚠️ Fair

Mon 04:00 fair ⚠️ Fair

Mon 05:00 fair ⚠️ Fair

Mon 06:00 fair ⚠️ Fair

Mon 07:00 fair ⚠️ Fair

Mon 08:00 fair ⚠️ Fair

Mon 09:00 fair ⚠️ Fair

Mon 10:00 fair ⚠️ Fair

Mon 11:00 poor ❌ Limited

Mon 12:00 poor ❌ Limited

Mon 13:00 poor ❌ Limited

Mon 14:00 poor ❌ Limited

Mon 15:00 poor ❌ Limited

Mon 16:00 poor ❌ Limited

Mon 17:00 poor ❌ Limited

Mon 18:00 poor ❌ Limited

Mon 19:00 poor ❌ Limited

Mon 20:00 poor ❌ Limited

Mon 21:00 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 and safety gate (outside daylight scores lower).

Detailed hourly data table

Time	Wave (m)	Wind (m/s)	Sea temp (°C)	Status
Fri 22:00	1.12 · high	13.00 · high	22.50 · good	poor
Fri 23:00	1.06 · high	16.30 · high	22.60 · good	poor
Sat 00:00	1.00 · high	18.10 · high	22.60 · good	poor
Sat 01:00	0.96 · high	17.90 · high	22.80 · good	poor
Sat 02:00	0.90 · high	18.40 · high	23.00 · good	poor
Sat 03:00	0.86 · high	15.30 · high	23.30 · good	poor
Sat 04:00	0.82 · high	13.30 · high	23.60 · good	poor
Sat 05:00	0.78 · high	10.00 · high	23.80 · good	poor
Sat 06:00	0.74 · high	6.90 · high	23.90 · good	poor
Sat 07:00	0.72 · high	6.10 · high	23.90 · good	poor
Sat 08:00	0.72 · high	5.50 · high	23.90 · good	poor
Sat 09:00	0.70 · high	4.90 · good	23.80 · good	poor
Sat 10:00	0.68 · high	5.00 · good	23.70 · good	poor
Sat 11:00	0.66 · high	2.20 · good	23.50 · good	poor
Sat 12:00	0.64 · high	0.50 · good	23.40 · good	poor
Sat 13:00	0.78 · high	3.30 · good	23.50 · good	poor
Sat 14:00	0.78 · high	3.90 · good	23.40 · good	poor
Sat 15:00	0.76 · high	3.30 · good	23.30 · good	poor
Sat 16:00	0.74 · high	3.10 · good	23.20 · good	poor
Sat 17:00	0.74 · high	3.60 · good	23.00 · good	poor
Sat 18:00	0.72 · high	1.10 · good	23.00 · good	poor
Sat 19:00	0.70 · high	7.30 · high	22.90 · good	poor
Sat 20:00	0.68 · high	10.70 · high	22.90 · good	poor
Sat 21:00	0.66 · high	7.90 · high	22.90 · good	poor
Sat 22:00	0.66 · high	8.00 · high	22.90 · good	poor
Sat 23:00	0.66 · high	7.20 · high	22.90 · good	poor
Sun 00:00	0.66 · high	6.40 · high	23.00 · good	poor
Sun 01:00	0.66 · high	6.90 · high	23.10 · good	fair
Sun 02:00	0.64 · high	7.80 · high	23.40 · good	poor
Sun 03:00	0.64 · high	9.10 · high	23.70 · good	poor
Sun 04:00	0.62 · high	8.00 · high	24.00 · good	poor
Sun 05:00	0.60 · high	7.30 · high	24.20 · good	poor
Sun 06:00	0.58 · high	8.20 · high	24.30 · good	poor
Sun 07:00	0.58 · high	10.20 · high	24.30 · good	poor
Sun 08:00	0.56 · high	10.20 · high	24.20 · good	poor
Sun 09:00	0.56 · high	9.80 · high	24.00 · good	poor
Sun 10:00	0.54 · high	7.50 · high	23.80 · good	fair
Sun 11:00	0.54 · high	3.70 · good	23.70 · good	poor
Sun 12:00	0.52 · high	3.60 · good	23.50 · good	poor
Sun 13:00	0.50 · high	5.50 · high	23.40 · good	poor
Sun 14:00	0.50 · high	6.70 · high	23.30 · good	poor
Sun 15:00	0.48 · high	6.00 · high	23.20 · good	poor
Sun 16:00	0.48 · high	4.50 · good	23.20 · good	poor
Sun 17:00	0.48 · high	4.40 · good	23.10 · good	poor
Sun 18:00	0.48 · high	4.00 · good	23.10 · good	poor
Sun 19:00	0.48 · high	4.30 · good	23.00 · good	poor
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