MARINE REPORT / 72 HOURS

Koh Tao Snorkel Report Today

Thailand · Updated Wed 19:23 (+07) · Source: Snapshot

The skinny

Poor Data updated Wed 19:23 (+07)

Koh Tao has no good model window later today. Check the three-day outlook and official beach advisories.

Right now (forecast)

Poor · 0.0/10

Wed 19:00 (+07)

Later today

No fresh data for this period.

Next three days

Excellent · 8.4/10

Fri 18:00 (+07)

Model estimates using Open-Meteo; not observations or safety guarantees. Check official advisories and conditions at the beach.

Score: 0.0/10

Best time: -

Main risk: Tide/Current

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:09

Sunset

18:00

Water

30.6°C

Max air

27.8°C

Sky

Cloudy

100% cloud

Good model window in the next 72 hours

Next good model window: Thu 07:00–18:00 (41% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Wednesday

❌ Poor conditions

Main blocker: Tide/current

Thursday

✅ Excellent conditions

Main blocker: Tide/current

Friday

✅ Excellent conditions

Main blocker: Tide/current

Best available hours

The next good model window starts at Thu 07:00 and lasts until 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Tide/current (71 hours)
  • Darkness (36 hours)
  • Sea temperature (13 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

Sat 11:00

Nearby alternatives in Thailand

Surin Islands

229 km away

✅ Good

Railay

257 km away

✅ Good

Koh Phi Phi

287 km away

✅ Good

Similan Islands

290 km away

✅ Good

Advanced forecast data

Viewing current forecast

Wed 19:00 – Sat 19:00 (+07)

Previous day Yesterday

Snorkel Score (next 24h)

Best snorkel score is 0.81 around Thu 18:00; 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.

24/24 sampled hours stay at or below 0.36m (range 0.04m to 0.12m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.65 to 4.34m/s).

Tides range from 0.44m to 1.22m; 0 of 24 hours are in or near peak slack windows.

72-hour forecast overview
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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 is better in daylight, so night hours score lower.
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Wed 20:00 0.12 · good 3.03 · good 30.60 · out of range Poor
Wed 21:00 0.10 · good 2.77 · good 30.60 · out of range Poor
Wed 22:00 0.10 · good 2.71 · good 30.50 · out of range Poor
Wed 23:00 0.10 · good 2.10 · good 30.40 · good Poor
Thu 00:00 0.10 · good 1.50 · good 30.30 · good Poor
Thu 01:00 0.10 · good 1.03 · good 30.30 · good Poor
Thu 02:00 0.10 · good 1.06 · good 30.20 · good Poor
Thu 03:00 0.08 · good 0.98 · good 30.20 · good Poor
Thu 04:00 0.08 · good 1.17 · good 30.10 · good Poor
Thu 05:00 0.08 · good 0.65 · good 30.00 · good Poor
Thu 06:00 0.08 · good 0.90 · good 30.00 · good Poor
Thu 07:00 0.08 · good 1.57 · good 30.00 · good Excellent
Thu 08:00 0.08 · good 2.17 · good 30.10 · good Excellent
Thu 09:00 0.06 · good 2.73 · good 30.20 · good Excellent
Thu 10:00 0.06 · good 3.08 · good 30.30 · good Excellent
Thu 11:00 0.06 · good 3.55 · good 30.40 · good Excellent
Thu 12:00 0.06 · good 3.76 · good 30.50 · out of range Excellent
Thu 13:00 0.06 · good 3.98 · good 30.50 · out of range Excellent
Thu 14:00 0.06 · good 4.34 · good 30.50 · out of range Excellent
Thu 15:00 0.06 · good 3.83 · good 30.50 · out of range Excellent
Thu 16:00 0.06 · good 2.95 · good 30.50 · out of range Excellent
Thu 17:00 0.06 · good 2.28 · good 30.50 · out of range Excellent
Thu 18:00 0.04 · good 2.41 · good 30.50 · out of range Excellent
Thu 19:00 0.04 · good 2.83 · good 30.40 · good Poor
Thu 20:00 0.04 · good 2.59 · good 30.40 · good Poor
Thu 21:00 0.04 · good 1.94 · good 30.30 · good Poor
Thu 22:00 0.04 · good 1.61 · good 30.30 · good Poor
Thu 23:00 0.04 · good 1.32 · good 30.20 · good Poor
Fri 00:00 0.04 · good 1.94 · good 30.20 · good Poor
Fri 01:00 0.04 · good 2.84 · good 30.10 · good Poor
Fri 02:00 0.04 · good 3.33 · good 30.10 · good Poor
Fri 03:00 0.04 · good 3.96 · good 30.10 · good Poor
Fri 04:00 0.04 · good 4.22 · good 30.00 · good Poor
Fri 05:00 0.04 · good 3.86 · good 30.00 · good Poor
Fri 06:00 0.04 · good 3.91 · good 30.00 · good Poor
Fri 07:00 0.04 · good 3.87 · good 30.00 · good Excellent
Fri 08:00 0.04 · good 3.95 · good 30.10 · good Excellent
Fri 09:00 0.06 · good 3.87 · good 30.20 · good Excellent
Fri 10:00 0.06 · good 3.83 · good 30.30 · good Excellent
Fri 11:00 0.06 · good 3.36 · good 30.40 · good Excellent
Fri 12:00 0.06 · good 2.69 · good 30.40 · good Excellent
Fri 13:00 0.06 · good 2.25 · good 30.50 · out of range Excellent
Fri 14:00 0.06 · good 2.05 · good 30.50 · out of range Excellent
Fri 15:00 0.04 · good 1.65 · good 30.50 · out of range Excellent
Fri 16:00 0.04 · good 1.21 · good 30.40 · good Excellent
Fri 17:00 0.04 · good 1.15 · good 30.40 · good Excellent
Fri 18:00 0.04 · good 0.97 · good 30.30 · good Excellent
Fri 19:00 0.04 · good 1.12 · good 30.30 · good Poor
Fri 20:00 0.04 · good 0.65 · good 30.20 · good Poor
Fri 21:00 0.04 · good 4.34 · good 30.20 · good Poor
Fri 22:00 0.04 · good 4.85 · good 30.20 · good Poor
Fri 23:00 0.06 · good 3.59 · good 30.10 · good Poor
Sat 00:00 0.06 · good 3.70 · good 30.10 · good Poor
Sat 01:00 0.08 · good 4.80 · good 30.10 · good Poor
Sat 02:00 0.16 · good 5.15 · good 30.00 · good Poor
Sat 03:00 0.22 · good 5.46 · high 30.00 · good Poor
Sat 04:00 0.30 · good 5.55 · high 30.00 · good Poor
Sat 05:00 0.28 · good 5.28 · good 29.90 · good Poor
Sat 06:00 0.28 · good 4.19 · good 29.90 · good Poor
Sat 07:00 0.26 · good 4.52 · good 29.90 · good Good
Sat 08:00 0.28 · good 6.26 · high 29.90 · good Fair
Sat 09:00 0.28 · good 6.57 · high 29.90 · good Fair
Sat 10:00 0.30 · good 5.23 · good 29.90 · good Fair
Sat 11:00 0.30 · good 4.76 · good 29.90 · good Fair
Sat 12:00 0.28 · good 4.37 · good 29.90 · good Fair
Sat 13:00 0.28 · good 4.11 · good 29.90 · good Fair
Sat 14:00 0.26 · good 3.87 · good 29.90 · good Good
Sat 15:00 0.22 · good 2.67 · good 29.90 · good Good
Sat 16:00 0.20 · good 2.37 · good 29.90 · good Good
Sat 17:00 0.18 · good 4.87 · good 29.90 · good Good
Sat 18:00 0.16 · good 5.51 · high 29.90 · good Poor