Can you snorkel in Koh Tao today?

Yes. The next good snorkeling window in Koh Tao starts Wed 00:00 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 Wed 01:29

Koh Tao has a usable snorkeling window around Wed 07:00. The main thing to watch is wind.

Score: 7.4/10

Best time: Wed 07:00

Main risk: Wind

Best morning signal: Wed 10:00 (Good).

Best afternoon signal: Wed 14:00 (Excellent). Peak afternoon wind is about 7.7 m/s.

Email me when it is good

Sunrise

06:08

Sunset

18:45

Water

30.5°C

Max air

29.0°C

Sky

Clear

2% cloud

Good window is available today

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

3-day planner Best available Show data

3-day planner

Wednesday

✅ excellent conditions

Main blocker: Tide/current

Thursday

⚠️ fair conditions

Main blocker: Waves

Friday

⚠️ fair conditions

Main blocker: Waves

Best available hours

Next safe window starts at Wed 00:00 until 11:00.

Why this verdict

Main blockers across the next 72 hours:

Wind (49 hours)
Waves (46 hours)
Tide/current (41 hours)

Jellyfish drift risk

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

Low · 34/100

Low peak drift risk around Wed 20:00.

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

Wed 10:00, 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

Mon 18:00 – Thu 18:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.29 around Tue 18:00; 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 0.6m to 0.7m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 5.53 to 9.08m/s).

Tides range from -0.27m to 1.72m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview

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 poor ❌ Limited

Tue 01:00 poor ❌ Limited

Tue 02:00 poor ❌ Limited

Tue 03:00 poor ❌ Limited

Tue 04:00 poor ❌ Limited

Tue 05:00 poor ❌ Limited

Tue 06:00 poor ❌ Limited

Tue 07:00 poor ❌ Limited

Tue 08:00 poor ❌ Limited

Tue 09:00 poor ❌ Limited

Tue 10:00 poor ❌ Limited

Tue 11:00 poor ❌ Limited

Tue 12:00 poor ❌ Limited

Tue 13:00 poor ❌ Limited

Tue 14:00 poor ❌ Limited

Tue 15:00 poor ❌ Limited

Tue 16:00 poor ❌ Limited

Tue 17:00 poor ❌ Limited

Tue 18:00 poor ❌ Limited

Tue 19:00 poor ❌ Limited

Tue 20:00 poor ❌ Limited

Tue 21:00 poor ❌ Limited

Tue 22:00 poor ❌ Limited

Tue 23:00 poor ❌ Limited

Wed 00:00 poor ❌ Limited

Wed 01:00 poor ❌ Limited

Wed 02:00 poor ❌ Limited

Wed 03:00 fair ⚠️ Fair

Wed 04:00 fair ⚠️ Fair

Wed 05:00 poor ❌ Limited

Wed 06:00 fair ⚠️ Fair

Wed 07:00 fair ⚠️ Fair

Wed 08:00 fair ⚠️ Fair

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

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
Mon 18:00	0.70 · high	8.41 · high	30.00 · good	poor
Mon 19:00	0.70 · high	8.40 · high	30.00 · good	poor
Mon 20:00	0.68 · high	7.63 · high	30.00 · good	poor
Mon 21:00	0.68 · high	8.44 · high	30.00 · good	poor
Mon 22:00	0.68 · high	7.34 · high	30.00 · good	poor
Mon 23:00	0.68 · high	8.28 · high	30.00 · good	poor
Tue 00:00	0.68 · high	8.11 · high	30.00 · good	poor
Tue 01:00	0.66 · high	8.55 · high	30.00 · good	poor
Tue 02:00	0.62 · high	9.08 · high	30.00 · good	poor
Tue 03:00	0.60 · high	8.19 · high	29.90 · good	poor
Tue 04:00	0.62 · high	7.11 · high	29.90 · good	poor
Tue 05:00	0.62 · high	7.34 · high	29.90 · good	poor
Tue 06:00	0.64 · high	7.08 · high	29.90 · good	poor
Tue 07:00	0.64 · high	7.49 · high	29.90 · good	poor
Tue 08:00	0.64 · high	7.65 · high	29.90 · good	poor
Tue 09:00	0.64 · high	8.40 · high	29.90 · good	poor
Tue 10:00	0.64 · high	8.43 · high	29.90 · good	poor
Tue 11:00	0.66 · high	8.10 · high	29.90 · good	poor
Tue 12:00	0.66 · high	7.84 · high	29.90 · good	poor
Tue 13:00	0.64 · high	7.36 · high	29.90 · good	poor
Tue 14:00	0.64 · high	6.38 · high	29.90 · good	poor
Tue 15:00	0.62 · high	5.53 · high	29.90 · good	poor
Tue 16:00	0.62 · high	5.71 · high	29.90 · good	poor
Tue 17:00	0.62 · high	5.58 · high	29.90 · good	poor
Tue 18:00	0.62 · high	6.33 · high	29.90 · good	poor
Tue 19:00	0.58 · high	6.70 · high	29.90 · good	poor
Tue 20:00	0.56 · high	6.59 · high	29.80 · good	poor
Tue 21:00	0.52 · high	6.20 · high	29.80 · good	poor
Tue 22:00	0.52 · high	5.74 · high	29.80 · good	poor
Tue 23:00	0.50 · high	5.55 · high	29.80 · good	poor
Wed 00:00	0.50 · high	6.22 · high	29.80 · good	poor
Wed 01:00	0.48 · high	7.03 · high	29.80 · good	poor
Wed 02:00	0.48 · high	7.84 · high	29.90 · good	poor
Wed 03:00	0.46 · high	6.73 · high	29.90 · good	fair
Wed 04:00	0.44 · high	6.36 · high	30.00 · good	fair
Wed 05:00	0.42 · high	7.71 · high	30.00 · good	poor
Wed 06:00	0.40 · high	5.70 · high	30.00 · good	fair
Wed 07:00	0.38 · high	2.86 · good	30.20 · good	fair
Wed 08:00	0.42 · high	7.41 · high	30.20 · good	fair
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