Can you snorkel in Koh Tao today?

Yes. The next good snorkeling window in Koh Tao starts Sun 03:00 and lasts until 11:00. Around 41% of the next 72 hours are suitable.

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 Sat 05:02 (+07) · Source: Snapshot

The skinny

Go in the best window Report Sun 03:51

Koh Tao has a usable snorkeling window around Sun 10:00. The main thing to watch is tide/current.

Score: 7.2/10

Best time: Sun 10:00

Main risk: Tide/Current

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

Best afternoon signal: Sun 16:00 (Good). Peak afternoon wind is about 4.9 m/s.

Email me when it is good

Sunrise

06:07

Sunset

18:46

Water

30.3°C

Max air

29.6°C

Sky

Clear

20% cloud

Good window is available today

Next safe window: Sun 03:00–11:00 (41% of next 72h are suitable)

3-day planner Best available Show data

3-day planner

Sunday

✅ good conditions

Main blocker: Tide/current

Monday

✅ excellent conditions

Main blocker: Tide/current

Tuesday

✅ good conditions

Main blocker: Waves

Best available hours

Next safe window starts at Sun 03:00 until 11:00.

Why this verdict

Main blockers across the next 72 hours:

Tide/current (48 hours)
Waves (37 hours)
Wind (37 hours)

Jellyfish drift risk

Drift estimate from wind, swell, current and warm water.

Low · 34/100

Low peak drift risk around Sun 17:00.

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 19:00

Sun 19:00, Mon 19:00

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 live forecast

Sat 20:00 – Tue 20:00 (+07)

Previous day Yesterday

Snorkel Score (next 24h)

Best snorkel score is 0.72 around Sun 16:00; 12 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.

6/24 sampled hours stay at or below 0.36m (range 0.22m to 0.58m).

Wind is at or below 5.4m/s in 7/24 sampled hours (range 1.81 to 8.32m/s).

Tides range from 0.09m to 1.02m; 1 of 24 hours are in or near peak slack windows.

72-hour forecast overview

Sat 21:00 poor ❌ Limited

Sat 22:00 poor ❌ Limited

Sat 23:00 poor ❌ Limited

Sun 00:00 fair ⚠️ Fair

Sun 01:00 fair ⚠️ Fair

Sun 02:00 fair ⚠️ Fair

Sun 03:00 good 🌟 Good

Sun 04:00 good 🌟 Good

Sun 05:00 good 🌟 Good

Sun 06:00 good 🌟 Good

Sun 07:00 good 🌟 Good

Sun 08:00 good 🌟 Good

Sun 09:00 good 🌟 Good

Sun 10:00 good 🌟 Good

Sun 11:00 good 🌟 Good

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 good 🌟 Good

Mon 01:00 good 🌟 Good

Mon 02:00 good 🌟 Good

Mon 03:00 good 🌟 Good

Mon 04:00 good 🌟 Good

Mon 05:00 good 🌟 Good

Mon 06:00 good 🌟 Good

Mon 07:00 excellent ✅ Excellent

Mon 08:00 excellent ✅ Excellent

Mon 09:00 excellent ✅ Excellent

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 fair ⚠️ Fair

Tue 03:00 good 🌟 Good

Tue 04:00 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 21:00	0.48 · high	6.48 · high	30.30 · good	poor
Sat 22:00	0.48 · high	6.53 · high	30.30 · good	poor
Sat 23:00	0.50 · high	7.03 · high	30.30 · good	poor
Sun 00:00	0.50 · high	7.16 · high	30.30 · good	fair
Sun 01:00	0.48 · high	6.85 · high	30.40 · good	fair
Sun 02:00	0.48 · high	6.67 · high	30.40 · good	fair
Sun 03:00	0.46 · high	5.92 · high	30.40 · good	good
Sun 04:00	0.42 · high	5.41 · high	30.50 · out of range	good
Sun 05:00	0.38 · high	4.90 · good	30.50 · out of range	good
Sun 06:00	0.34 · good	3.41 · good	30.60 · out of range	good
Sun 07:00	0.30 · good	2.73 · good	30.60 · out of range	good
Sun 08:00	0.26 · good	2.59 · good	30.60 · out of range	good
Sun 09:00	0.22 · good	1.81 · good	30.70 · out of range	good
Sun 10:00	0.28 · good	2.28 · good	30.70 · out of range	good
Sun 11:00	0.36 · good	2.76 · good	30.70 · out of range	good
Sun 12:00	0.42 · high	6.35 · high	30.70 · out of range	poor
Sun 13:00	0.48 · high	8.32 · high	30.70 · out of range	poor
Sun 14:00	0.52 · high	7.85 · high	30.70 · out of range	poor
Sun 15:00	0.58 · high	6.73 · high	30.60 · out of range	poor
Sun 16:00	0.56 · high	6.58 · high	30.50 · out of range	poor
Sun 17:00	0.56 · high	6.54 · high	30.50 · out of range	poor
Sun 18:00	0.54 · high	5.51 · high	30.40 · good	poor
Sun 19:00	0.54 · high	5.76 · high	30.40 · good	poor
Sun 20:00	0.52 · high	6.15 · high	30.40 · good	poor
Sun 21:00	0.52 · high	6.23 · high	30.30 · good	poor
Sun 22:00	0.50 · high	5.87 · high	30.30 · good	poor
Sun 23:00	0.50 · high	5.66 · high	30.30 · good	poor
Mon 00:00	0.48 · high	5.74 · high	30.30 · good	good
Mon 01:00	0.46 · high	5.49 · high	30.40 · good	good
Mon 02:00	0.42 · high	5.24 · good	30.40 · good	good
Mon 03:00	0.40 · high	5.17 · good	30.50 · out of range	good
Mon 04:00	0.36 · good	5.46 · high	30.50 · out of range	good
Mon 05:00	0.34 · good	4.47 · good	30.60 · out of range	good
Mon 06:00	0.30 · good	3.57 · good	30.60 · out of range	good
Mon 07:00	0.26 · good	2.96 · good	30.70 · out of range	excellent
Mon 08:00	0.24 · good	2.44 · good	30.70 · out of range	excellent
Mon 09:00	0.20 · good	2.25 · good	30.70 · out of range	excellent
Mon 10:00	0.20 · good	2.85 · good	30.80 · out of range	good
Mon 11:00	0.22 · good	2.93 · good	30.80 · out of range	good
Mon 12:00	0.22 · good	3.11 · good	30.80 · out of range	poor
Mon 13:00	0.26 · good	5.43 · high	30.70 · out of range	poor
Mon 14:00	0.32 · good	7.89 · high	30.70 · out of range	poor
Mon 15:00	0.36 · good	4.28 · good	30.60 · out of range	poor
Mon 16:00	0.40 · high	5.67 · high	30.60 · out of range	poor
Mon 17:00	0.42 · high	5.61 · high	30.50 · out of range	poor
Mon 18:00	0.46 · high	5.50 · high	30.50 · out of range	poor
Mon 19:00	0.46 · high	5.38 · good	30.40 · good	poor
Mon 20:00	0.48 · high	6.86 · high	30.40 · good	poor
Mon 21:00	0.48 · high	5.57 · high	30.40 · good	poor
Mon 22:00	0.46 · high	5.90 · high	30.40 · good	poor
Mon 23:00	0.46 · high	6.04 · high	30.40 · good	poor
Tue 00:00	0.44 · high	5.54 · high	30.40 · good	fair
Tue 01:00	0.42 · high	5.61 · high	30.40 · good	fair
Tue 02:00	0.42 · high	6.35 · high	30.40 · good	fair
Tue 03:00	0.40 · high	5.77 · high	30.50 · out of range	good
Tue 04:00	0.36 · good	5.77 · high	30.60 · out of range	good