Can you snorkel in Koh Tao today?

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

What is the best time of day to snorkel in Koh Tao?

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 Koh Tao 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.

Koh Tao Snorkel Report Today

Thailand · Updated Tue 04:13 (+07) · Source: Snapshot · Showing fallback/stale data

The skinny

Marginal Report Wed 19:26

Koh Tao looks marginal today. The least-bad daylight window is around Thu 13:00, but waves is limiting the forecast.

Score: 5.2/10

Best time: Thu 13:00

Main risk: Waves

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:08

Sunset

18:45

Water

30.7°C

Max air

28.4°C

Sky

Cloudy

98% 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

❌ poor conditions

Main blocker: Wind

Thursday

⚠️ fair conditions

Main blocker: Waves

Friday

⚠️ fair conditions

Main blocker: Waves

Best available hours

Thu 06:00 — Fair (0.52) · still limited by wind, sea temperature
Thu 05:00 — Fair (0.52) · still limited by waves, wind
Thu 09:00 — Fair (0.51) · still limited by waves, wind

Why this verdict

Main blockers across the next 72 hours:

Waves (37 hours)
Wind (36 hours)
Tide/current (27 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

Thu 11:00

Nearby alternatives in Thailand

Surin Islands

229 km away

❌ Poor

Railay

257 km away

✅ Good

Koh Phi Phi

287 km away

✅ Good

Similan Islands

290 km away

❌ Poor

Advanced forecast data

Viewing historical data

Sat 12:00 – Tue 12:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.37 around Sun 18:00; 3 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 0.3m to 0.56m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 14.5 to 25.6m/s).

Tides range from 0.14m to 1.47m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview

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 poor ❌ Limited

Sun 02:00 poor ❌ Limited

Sun 03:00 fair ⚠️ Fair

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 fair ⚠️ Fair

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 poor ❌ Limited

Mon 01:00 poor ❌ Limited

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 good 🌟 Good

Mon 09:00 fair ⚠️ Fair

Mon 10:00 good 🌟 Good

Mon 11:00 good 🌟 Good

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

Mon 22:00 poor ❌ Limited

Mon 23:00 poor ❌ Limited

Tue 00:00 fair ⚠️ Fair

Tue 01:00 fair ⚠️ Fair

Tue 02:00 good 🌟 Good

Tue 03:00 fair ⚠️ Fair

Tue 04:00 fair ⚠️ Fair

Tue 05:00 fair ⚠️ Fair

Tue 06:00 good 🌟 Good

Tue 07:00 good 🌟 Good

Tue 08:00 good 🌟 Good

Tue 09:00 good 🌟 Good

Tue 10:00 good 🌟 Good

Tue 11:00 good 🌟 Good

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 12:00	0.52 · high	16.20 · high	30.30 · good	poor
Sat 13:00	0.50 · high	17.30 · high	30.30 · good	poor
Sat 14:00	0.50 · high	19.70 · high	30.30 · good	poor
Sat 15:00	0.48 · high	19.60 · high	30.30 · good	poor
Sat 16:00	0.48 · high	21.50 · high	30.20 · good	poor
Sat 17:00	0.46 · high	22.70 · high	30.20 · good	poor
Sat 18:00	0.46 · high	25.60 · high	30.20 · good	poor
Sat 19:00	0.48 · high	22.50 · high	30.20 · good	poor
Sat 20:00	0.52 · high	23.60 · high	30.20 · good	poor
Sat 21:00	0.54 · high	21.60 · high	30.20 · good	poor
Sat 22:00	0.54 · high	22.30 · high	30.20 · good	poor
Sat 23:00	0.56 · high	21.60 · high	30.20 · good	poor
Sun 00:00	0.56 · high	22.10 · high	30.20 · good	poor
Sun 01:00	0.52 · high	23.00 · high	30.20 · good	poor
Sun 02:00	0.50 · high	22.20 · high	30.20 · good	poor
Sun 03:00	0.46 · high	23.40 · high	30.20 · good	fair
Sun 04:00	0.44 · high	24.00 · high	30.20 · good	poor
Sun 05:00	0.44 · high	21.80 · high	30.30 · good	poor
Sun 06:00	0.42 · high	20.00 · high	30.30 · good	poor
Sun 07:00	0.40 · high	19.00 · high	30.30 · good	poor
Sun 08:00	0.38 · high	19.00 · high	30.30 · good	poor
Sun 09:00	0.36 · good	19.10 · high	30.30 · good	poor
Sun 10:00	0.32 · good	17.60 · high	30.30 · good	fair
Sun 11:00	0.30 · good	14.50 · high	30.30 · good	fair
Sun 12:00	0.26 · good	11.80 · high	30.30 · good	poor
Sun 13:00	0.28 · good	10.70 · high	30.30 · good	poor
Sun 14:00	0.28 · good	14.00 · high	30.20 · good	poor
Sun 15:00	0.30 · good	18.70 · high	30.20 · good	poor
Sun 16:00	0.32 · good	18.40 · high	30.20 · good	poor
Sun 17:00	0.36 · good	18.50 · high	30.20 · good	poor
Sun 18:00	0.38 · high	18.20 · high	30.20 · good	poor
Sun 19:00	0.38 · high	18.20 · high	30.20 · good	poor
Sun 20:00	0.36 · good	21.30 · high	30.20 · good	poor
Sun 21:00	0.36 · good	23.40 · high	30.20 · good	poor
Sun 22:00	0.38 · high	24.80 · high	30.20 · good	poor
Sun 23:00	0.40 · high	24.70 · high	30.20 · good	poor
Mon 00:00	0.42 · high	25.20 · high	30.20 · good	poor
Mon 01:00	0.40 · high	26.20 · high	30.20 · good	poor
Mon 02:00	0.40 · high	26.60 · high	30.20 · good	fair
Mon 03:00	0.38 · high	25.60 · high	30.20 · good	fair
Mon 04:00	0.36 · good	23.80 · high	30.20 · good	fair
Mon 05:00	0.34 · good	20.70 · high	30.20 · good	fair
Mon 06:00	0.32 · good	16.20 · high	30.20 · good	fair
Mon 07:00	0.28 · good	9.20 · high	30.20 · good	fair
Mon 08:00	0.26 · good	6.20 · high	30.30 · good	good
Mon 09:00	0.22 · good	8.50 · high	30.30 · good	fair
Mon 10:00	0.16 · good	3.05 · good	30.50 · out of range	good
Mon 11:00	0.14 · good	4.88 · good	30.50 · out of range	good
Mon 12:00	0.14 · good	4.91 · good	30.50 · out of range	poor
Mon 13:00	0.18 · good	4.94 · good	30.50 · out of range	poor
Mon 14:00	0.24 · good	4.30 · good	30.40 · good	poor
Mon 15:00	0.28 · good	4.97 · good	30.40 · good	poor
Mon 16:00	0.32 · good	5.73 · high	30.40 · good	poor
Mon 17:00	0.34 · good	5.87 · high	30.30 · good	poor
Mon 18:00	0.38 · high	5.82 · high	30.30 · good	poor
Mon 19:00	0.40 · high	5.82 · high	30.30 · good	poor
Mon 20:00	0.40 · high	5.73 · high	30.30 · good	poor
Mon 21:00	0.42 · high	5.50 · high	30.30 · good	poor
Mon 22:00	0.42 · high	5.68 · high	30.30 · good	poor
Mon 23:00	0.42 · high	6.06 · high	30.30 · good	poor
Tue 00:00	0.42 · high	5.87 · high	30.30 · good	fair
Tue 01:00	0.42 · high	5.81 · high	30.30 · good	fair
Tue 02:00	0.40 · high	5.82 · high	30.30 · good	good
Tue 03:00	0.40 · high	5.33 · good	30.40 · good	fair
Tue 04:00	0.38 · high	5.44 · high	30.40 · good	fair
Tue 05:00	0.38 · high	4.90 · good	30.50 · out of range	fair
Tue 06:00	0.36 · good	3.87 · good	30.50 · out of range	good
Tue 07:00	0.34 · good	3.23 · good	30.50 · out of range	good
Tue 08:00	0.32 · good	3.36 · good	30.50 · out of range	good
Tue 09:00	0.30 · good	3.12 · good	30.60 · out of range	good
Tue 10:00	0.30 · good	3.34 · good	30.50 · out of range	good
Tue 11:00	0.28 · good	3.35 · good	30.50 · out of range	good