Can you snorkel in Koh Tao today?

Yes. The next good snorkeling window in Koh Tao starts Tue 10:00 and lasts until 11:00. Around 21% 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 Tue 04:13 (+07) · Source: Snapshot

The skinny

Go in the best window Report Tue 16:27

Koh Tao has a usable snorkeling window around Tue 17:00. The main thing to watch is wind.

Score: 8.1/10

Best time: Tue 17:00

Main risk: Wind

No useful morning window is showing yet.

Best afternoon signal: Tue 17:00 (Excellent). Peak afternoon wind is about 3.8 m/s.

Email me when it is good

Sunrise

06:08

Sunset

18:45

Water

30.9°C

Max air

29.0°C

Sky

Clear

4% cloud

Good window is available today

Next safe window: Tue 10:00–11:00 (21% of next 72h are suitable)

3-day planner Best available Show data

3-day planner

Tuesday

✅ excellent conditions

Main blocker: Sea temperature

Wednesday

✅ excellent conditions

Main blocker: Tide/current

Thursday

⚠️ fair conditions

Main blocker: Waves

Best available hours

Next safe window starts at Tue 10:00 until 11:00.

Why this verdict

Main blockers across the next 72 hours:

Wind (54 hours)
Tide/current (50 hours)
Waves (48 hours)

Jellyfish drift risk

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

Low · 31/100

Low peak drift risk around Tue 18:00.

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

Tue 10:00, Wed 10:00, Thu 11:00

Nearby alternatives in Thailand

Surin Islands

229 km away

⚠️ Fair

Railay

257 km away

✅ Good

Koh Phi Phi

287 km away

✅ Good

Similan Islands

290 km away

⚠️ Fair

Advanced forecast data

Viewing historical data

Wed 09:00 – Sat 09:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.64 around Thu 10:00; 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.

20/24 sampled hours stay at or below 0.36m (range 0.22m to 0.46m).

Wind is at or below 5.4m/s in 23/24 sampled hours (range 2.56 to 5.78m/s).

Tides range from -0.14m to 1.81m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview

Wed 09:00 fair ⚠️ Fair

Wed 10:00 fair ⚠️ Fair

Wed 11:00 good 🌟 Good

Wed 12:00 poor ❌ Limited

Wed 13:00 poor ❌ Limited

Wed 14:00 poor ❌ Limited

Wed 15:00 poor ❌ Limited

Wed 16:00 poor ❌ Limited

Wed 17:00 poor ❌ Limited

Wed 18:00 poor ❌ Limited

Wed 19:00 poor ❌ Limited

Wed 20:00 poor ❌ Limited

Wed 21:00 poor ❌ Limited

Wed 22:00 poor ❌ Limited

Wed 23:00 poor ❌ Limited

Thu 00:00 good 🌟 Good

Thu 01:00 good 🌟 Good

Thu 02:00 good 🌟 Good

Thu 03:00 good 🌟 Good

Thu 04:00 good 🌟 Good

Thu 05:00 good 🌟 Good

Thu 06:00 good 🌟 Good

Thu 07:00 good 🌟 Good

Thu 08:00 good 🌟 Good

Thu 09:00 good 🌟 Good

Thu 10:00 good 🌟 Good

Thu 11:00 good 🌟 Good

Thu 12:00 poor ❌ Limited

Thu 13:00 poor ❌ Limited

Thu 14:00 poor ❌ Limited

Thu 15:00 poor ❌ Limited

Thu 16:00 poor ❌ Limited

Thu 17:00 poor ❌ Limited

Thu 18:00 poor ❌ Limited

Thu 19:00 poor ❌ Limited

Thu 20:00 poor ❌ Limited

Thu 21:00 poor ❌ Limited

Thu 22:00 poor ❌ Limited

Thu 23:00 poor ❌ Limited

Fri 00:00 fair ⚠️ Fair

Fri 01:00 fair ⚠️ Fair

Fri 02:00 fair ⚠️ Fair

Fri 03:00 fair ⚠️ Fair

Fri 04:00 good 🌟 Good

Fri 05:00 fair ⚠️ Fair

Fri 06:00 fair ⚠️ Fair

Fri 07:00 fair ⚠️ Fair

Fri 08:00 fair ⚠️ Fair

Fri 09:00 fair ⚠️ Fair

Fri 10:00 fair ⚠️ Fair

Fri 11:00 fair ⚠️ Fair

Fri 12:00 poor ❌ Limited

Fri 13:00 poor ❌ Limited

Fri 14:00 poor ❌ Limited

Fri 15:00 poor ❌ Limited

Fri 16:00 poor ❌ Limited

Fri 17:00 poor ❌ Limited

Fri 18:00 poor ❌ Limited

Fri 19:00 poor ❌ Limited

Fri 20:00 poor ❌ Limited

Fri 21:00 poor ❌ Limited

Fri 22:00 poor ❌ Limited

Fri 23:00 poor ❌ Limited

Sat 00:00 fair ⚠️ Fair

Sat 01:00 fair ⚠️ Fair

Sat 02:00 fair ⚠️ Fair

Sat 03:00 fair ⚠️ Fair

Sat 04:00 fair ⚠️ Fair

Sat 05:00 fair ⚠️ Fair

Sat 06:00 excellent ✅ Excellent

Sat 07:00 good 🌟 Good

Sat 08:00 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
Wed 09:00	0.46 · high	4.92 · good	30.20 · good	fair
Wed 10:00	0.44 · high	4.67 · good	30.20 · good	fair
Wed 11:00	0.40 · high	3.15 · good	30.20 · good	good
Wed 12:00	0.38 · high	3.74 · good	30.20 · good	poor
Wed 13:00	0.34 · good	3.82 · good	30.20 · good	poor
Wed 14:00	0.32 · good	3.05 · good	30.20 · good	poor
Wed 15:00	0.28 · good	2.88 · good	30.20 · good	poor
Wed 16:00	0.26 · good	2.56 · good	30.20 · good	poor
Wed 17:00	0.24 · good	3.24 · good	30.10 · good	poor
Wed 18:00	0.22 · good	3.61 · good	30.10 · good	poor
Wed 19:00	0.24 · good	3.66 · good	30.10 · good	poor
Wed 20:00	0.26 · good	4.17 · good	30.10 · good	poor
Wed 21:00	0.28 · good	4.90 · good	30.10 · good	poor
Wed 22:00	0.30 · good	4.78 · good	30.10 · good	poor
Wed 23:00	0.34 · good	4.97 · good	30.10 · good	poor
Thu 00:00	0.36 · good	5.17 · good	30.10 · good	good
Thu 01:00	0.34 · good	5.78 · high	30.10 · good	good
Thu 02:00	0.32 · good	5.39 · good	30.20 · good	good
Thu 03:00	0.30 · good	5.38 · good	30.20 · good	good
Thu 04:00	0.28 · good	4.88 · good	30.30 · good	good
Thu 05:00	0.28 · good	4.68 · good	30.40 · good	good
Thu 06:00	0.26 · good	3.98 · good	30.40 · good	good
Thu 07:00	0.24 · good	3.54 · good	30.40 · good	good
Thu 08:00	0.24 · good	2.70 · good	30.50 · out of range	good
Thu 09:00	0.22 · good	3.15 · good	30.50 · out of range	good
Thu 10:00	0.20 · good	2.15 · good	30.50 · out of range	good
Thu 11:00	0.20 · good	1.43 · good	30.40 · good	good
Thu 12:00	0.18 · good	3.28 · good	30.40 · good	poor
Thu 13:00	0.20 · good	3.61 · good	30.40 · good	poor
Thu 14:00	0.20 · good	4.31 · good	30.40 · good	poor
Thu 15:00	0.22 · good	4.25 · good	30.30 · good	poor
Thu 16:00	0.24 · good	4.18 · good	30.30 · good	poor
Thu 17:00	0.24 · good	5.10 · good	30.20 · good	poor
Thu 18:00	0.26 · good	4.72 · good	30.20 · good	poor
Thu 19:00	0.28 · good	4.78 · good	30.20 · good	poor
Thu 20:00	0.30 · good	5.41 · high	30.10 · good	poor
Thu 21:00	0.32 · good	5.73 · high	30.10 · good	poor
Thu 22:00	0.36 · good	5.66 · high	30.10 · good	poor
Thu 23:00	0.38 · high	5.77 · high	30.10 · good	poor
Fri 00:00	0.42 · high	5.59 · high	30.10 · good	fair
Fri 01:00	0.42 · high	5.77 · high	30.10 · good	fair
Fri 02:00	0.42 · high	5.79 · high	30.20 · good	fair
Fri 03:00	0.42 · high	5.80 · high	30.20 · good	fair
Fri 04:00	0.40 · high	5.05 · good	30.20 · good	good
Fri 05:00	0.40 · high	4.65 · good	30.30 · good	fair
Fri 06:00	0.38 · high	5.84 · high	30.30 · good	fair
Fri 07:00	0.38 · high	4.80 · good	30.30 · good	fair
Fri 08:00	0.38 · high	3.55 · good	30.30 · good	fair
Fri 09:00	0.38 · high	4.22 · good	30.30 · good	fair
Fri 10:00	0.40 · high	4.32 · good	30.30 · good	fair
Fri 11:00	0.44 · high	4.73 · good	30.20 · good	fair
Fri 12:00	0.46 · high	5.16 · good	30.20 · good	poor
Fri 13:00	0.48 · high	3.62 · good	30.20 · good	poor
Fri 14:00	0.50 · high	4.83 · good	30.20 · good	poor
Fri 15:00	0.52 · high	5.44 · high	30.20 · good	poor
Fri 16:00	0.50 · high	6.34 · high	30.20 · good	poor
Fri 17:00	0.48 · high	6.84 · high	30.10 · good	poor
Fri 18:00	0.46 · high	6.21 · high	30.10 · good	poor
Fri 19:00	0.46 · high	5.59 · high	30.10 · good	poor
Fri 20:00	0.44 · high	5.96 · high	30.10 · good	poor
Fri 21:00	0.44 · high	7.25 · high	30.10 · good	poor
Fri 22:00	0.44 · high	5.15 · good	30.10 · good	poor
Fri 23:00	0.42 · high	6.14 · high	30.10 · good	poor
Sat 00:00	0.42 · high	6.32 · high	30.10 · good	fair
Sat 01:00	0.40 · high	5.89 · high	30.10 · good	fair
Sat 02:00	0.40 · high	5.60 · high	30.10 · good	fair
Sat 03:00	0.38 · high	5.41 · high	30.20 · good	fair
Sat 04:00	0.38 · high	6.30 · high	30.20 · good	fair
Sat 05:00	0.38 · high	4.73 · good	30.30 · good	fair
Sat 06:00	0.26 · good	3.72 · good	30.60 · out of range	excellent
Sat 07:00	0.24 · good	2.90 · good	30.60 · out of range	good
Sat 08:00	0.22 · good	3.14 · good	30.70 · out of range	good