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 Thu 01:31

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

Best morning signal: Thu 07:00 (Fair).

Best afternoon signal: Thu 13:00 (Fair). Peak afternoon wind is about 9.0 m/s.

Email me when it is good

Sunrise

06:08

Sunset

18:45

Water

30.5°C

Max air

28.3°C

Sky

Cloudy

100% 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 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 (32 hours)
Wind (31 hours)
Tide/current (21 hours)

Jellyfish drift risk

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

Low · 31/100

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

Tue 18:00 – Fri 18:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.28 around Wed 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 0.54m to 0.7m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 22.6 to 33.0m/s).

Tides range from -0.23m to 1.49m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview

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 poor ❌ Limited

Wed 04:00 poor ❌ Limited

Wed 05:00 poor ❌ Limited

Wed 06:00 poor ❌ Limited

Wed 07:00 poor ❌ Limited

Wed 08:00 poor ❌ Limited

Wed 09:00 poor ❌ Limited

Wed 10:00 poor ❌ Limited

Wed 11:00 poor ❌ Limited

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 poor ❌ Limited

Thu 01:00 poor ❌ Limited

Thu 02:00 poor ❌ Limited

Thu 03:00 poor ❌ Limited

Thu 04:00 poor ❌ Limited

Thu 05:00 poor ❌ Limited

Thu 06:00 poor ❌ Limited

Thu 07:00 poor ❌ Limited

Thu 08:00 poor ❌ Limited

Thu 09:00 poor ❌ Limited

Thu 10:00 poor ❌ Limited

Thu 11:00 poor ❌ Limited

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 poor ❌ Limited

Fri 01:00 poor ❌ Limited

Fri 02:00 poor ❌ Limited

Fri 03:00 poor ❌ Limited

Fri 04:00 poor ❌ Limited

Fri 05:00 poor ❌ Limited

Fri 06:00 poor ❌ Limited

Fri 07:00 poor ❌ Limited

Fri 08:00 poor ❌ Limited

Fri 09:00 poor ❌ Limited

Fri 10:00 poor ❌ Limited

Fri 11:00 poor ❌ Limited

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

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
Tue 18:00	0.60 · high	32.10 · high	30.50 · out of range	poor
Tue 19:00	0.60 · high	22.60 · high	30.50 · out of range	poor
Tue 20:00	0.62 · high	30.90 · high	30.50 · out of range	poor
Tue 21:00	0.62 · high	28.50 · high	30.50 · out of range	poor
Tue 22:00	0.64 · high	31.00 · high	30.50 · out of range	poor
Tue 23:00	0.64 · high	32.70 · high	30.50 · out of range	poor
Wed 00:00	0.66 · high	26.20 · high	30.50 · out of range	poor
Wed 01:00	0.64 · high	31.90 · high	30.50 · out of range	poor
Wed 02:00	0.64 · high	32.30 · high	30.50 · out of range	poor
Wed 03:00	0.62 · high	28.80 · high	30.50 · out of range	poor
Wed 04:00	0.60 · high	27.50 · high	30.50 · out of range	poor
Wed 05:00	0.56 · high	25.80 · high	30.50 · out of range	poor
Wed 06:00	0.54 · high	24.70 · high	30.50 · out of range	poor
Wed 07:00	0.58 · high	32.10 · high	30.50 · out of range	poor
Wed 08:00	0.62 · high	25.10 · high	30.50 · out of range	poor
Wed 09:00	0.66 · high	32.50 · high	30.50 · out of range	poor
Wed 10:00	0.64 · high	33.00 · high	30.50 · out of range	poor
Wed 11:00	0.62 · high	27.60 · high	30.50 · out of range	poor
Wed 12:00	0.60 · high	31.40 · high	30.50 · out of range	poor
Wed 13:00	0.64 · high	29.70 · high	30.50 · out of range	poor
Wed 14:00	0.66 · high	31.30 · high	30.50 · out of range	poor
Wed 15:00	0.70 · high	29.60 · high	30.50 · out of range	poor
Wed 16:00	0.70 · high	27.10 · high	30.40 · good	poor
Wed 17:00	0.70 · high	28.60 · high	30.40 · good	poor
Wed 18:00	0.70 · high	33.00 · high	30.40 · good	poor
Wed 19:00	0.70 · high	29.10 · high	30.40 · good	poor
Wed 20:00	0.70 · high	28.10 · high	30.40 · good	poor
Wed 21:00	0.70 · high	30.80 · high	30.40 · good	poor
Wed 22:00	0.72 · high	23.00 · high	30.40 · good	poor
Wed 23:00	0.72 · high	31.50 · high	30.40 · good	poor
Thu 00:00	0.74 · high	27.30 · high	30.40 · good	poor
Thu 01:00	0.72 · high	32.70 · high	30.40 · good	poor
Thu 02:00	0.72 · high	29.50 · high	30.40 · good	poor
Thu 03:00	0.70 · high	28.80 · high	30.40 · good	poor
Thu 04:00	0.68 · high	29.30 · high	30.40 · good	poor
Thu 05:00	0.68 · high	27.00 · high	30.40 · good	poor
Thu 06:00	0.66 · high	24.40 · high	30.40 · good	poor
Thu 07:00	0.70 · high	31.60 · high	30.40 · good	poor
Thu 08:00	0.72 · high	18.70 · high	30.40 · good	poor
Thu 09:00	0.76 · high	25.10 · high	30.40 · good	poor
Thu 10:00	0.78 · high	27.90 · high	30.40 · good	poor
Thu 11:00	0.80 · high	24.10 · high	30.40 · good	poor
Thu 12:00	0.82 · high	28.20 · high	30.40 · good	poor
Thu 13:00	0.78 · high	29.80 · high	30.40 · good	poor
Thu 14:00	0.76 · high	31.90 · high	30.40 · good	poor
Thu 15:00	0.72 · high	32.10 · high	30.40 · good	poor
Thu 16:00	0.70 · high	29.40 · high	30.30 · good	poor
Thu 17:00	0.66 · high	30.40 · high	30.30 · good	poor
Thu 18:00	0.64 · high	33.60 · high	30.30 · good	poor
Thu 19:00	0.66 · high	27.90 · high	30.30 · good	poor
Thu 20:00	0.68 · high	28.70 · high	30.30 · good	poor
Thu 21:00	0.70 · high	29.00 · high	30.30 · good	poor
Thu 22:00	0.70 · high	30.40 · high	30.30 · good	poor
Thu 23:00	0.70 · high	28.70 · high	30.30 · good	poor
Fri 00:00	0.70 · high	20.80 · high	30.30 · good	poor
Fri 01:00	0.68 · high	21.30 · high	30.30 · good	poor
Fri 02:00	0.68 · high	29.50 · high	30.30 · good	poor
Fri 03:00	0.66 · high	27.70 · high	30.30 · good	poor
Fri 04:00	0.66 · high	28.40 · high	30.30 · good	poor
Fri 05:00	0.68 · high	29.90 · high	30.30 · good	poor
Fri 06:00	0.68 · high	29.70 · high	30.30 · good	poor
Fri 07:00	0.70 · high	30.50 · high	30.30 · good	poor
Fri 08:00	0.72 · high	34.10 · high	30.30 · good	poor
Fri 09:00	0.74 · high	35.40 · high	30.30 · good	poor
Fri 10:00	0.74 · high	35.10 · high	30.20 · good	poor
Fri 11:00	0.48 · high	26.50 · high	30.30 · good	poor
Fri 12:00	0.52 · high	26.50 · high	30.30 · good	poor
Fri 13:00	0.54 · high	28.30 · high	30.30 · good	poor
Fri 14:00	0.54 · high	28.30 · high	30.30 · good	poor
Fri 15:00	0.56 · high	28.50 · high	30.20 · good	poor
Fri 16:00	0.56 · high	23.70 · high	30.20 · good	poor
Fri 17:00	0.56 · high	25.80 · high	30.20 · good	poor