SnorkelForecast.com

Railay Snorkel Report Today

Thailand · Updated Fri 03:25 (+07) · Source: Snapshot

The skinny

Go in the best window Report Fri 12:51

Railay has a usable snorkeling window around Fri 18:00. The main thing to watch is sea temperature.

Score: 6.3/10

Best time: Fri 18:00

Main risk: Sea Temperature

No useful morning window is showing yet.

Best afternoon signal: Fri 18:00 (Good). Peak afternoon wind is about 5.5 m/s.

Email me when it is good

Sunrise

06:15

Sunset

18:46

Water

31.0°C

Max air

27.8°C

Sky

Cloudy

88% cloud

Good window is available today

Next safe window: Fri 11:00 (28% of next 72h are suitable)

3-day planner Best available Show data

3-day planner

Friday

✅ good conditions

Main blocker: Waves

Saturday

✅ good conditions

Main blocker: Sea temperature

Sunday

✅ good conditions

Main blocker: Sea temperature

Best available hours

Next safe window starts at Fri 11:00.

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (69 hours)
  • Waves (36 hours)
  • Darkness (36 hours)

Jellyfish drift risk

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

Low · 29/100

Low peak drift risk around Fri 19:00.

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: Sat 00:00

Fri 11:00, Sat 00:00, Sat 12:00, Sun 01:00, Sun 13:00

Nearby alternatives in Thailand

Koh Phi Phi

31 km away

❌ Poor

Koh Kradan

94 km away

❌ Poor

Similan Islands

149 km away

❌ Poor

Koh Lipe

177 km away

❌ Poor

Advanced forecast data

Viewing historical data

Wed 05:00 – Sat 05:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.16 around Thu 08:00; 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.

22/24 sampled hours stay at or below 0.36m (range 0.2m to 0.4m).

Wind is at or below 5.4m/s in 1/24 sampled hours (range 3.4 to 17.8m/s).

Tides range from 0.06m to 1.28m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
poor ❌ Limited
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fair ⚠️ Fair
poor ❌ Limited
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fair ⚠️ Fair
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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
Wed 05:00 0.22 · good 13.10 · high 31.30 · out of range poor
Wed 06:00 0.22 · good 13.20 · high 31.30 · out of range poor
Wed 07:00 0.24 · good 13.60 · high 31.30 · out of range poor
Wed 08:00 0.28 · good 14.80 · high 31.30 · out of range poor
Wed 09:00 0.30 · good 16.40 · high 31.30 · out of range poor
Wed 10:00 0.34 · good 15.80 · high 31.30 · out of range poor
Wed 11:00 0.36 · good 14.50 · high 31.30 · out of range poor
Wed 12:00 0.40 · high 17.80 · high 31.30 · out of range poor
Wed 13:00 0.40 · high 16.10 · high 31.30 · out of range poor
Wed 14:00 0.26 · good 9.70 · high 31.20 · out of range poor
Wed 15:00 0.26 · good 9.50 · high 31.20 · out of range poor
Wed 16:00 0.26 · good 8.40 · high 31.20 · out of range poor
Wed 17:00 0.24 · good 8.70 · high 31.10 · out of range poor
Wed 18:00 0.24 · good 11.90 · high 31.10 · out of range poor
Wed 19:00 0.22 · good 7.50 · high 31.10 · out of range poor
Wed 20:00 0.22 · good 12.10 · high 31.10 · out of range poor
Wed 21:00 0.20 · good 3.40 · good 31.10 · out of range poor
Wed 22:00 0.20 · good 7.90 · high 31.00 · out of range poor
Wed 23:00 0.22 · good 10.00 · high 31.00 · out of range poor
Thu 00:00 0.22 · good 8.90 · high 31.00 · out of range poor
Thu 01:00 0.24 · good 7.80 · high 31.00 · out of range poor
Thu 02:00 0.24 · good 10.50 · high 31.10 · out of range poor
Thu 03:00 0.26 · good 10.60 · high 31.10 · out of range poor
Thu 04:00 0.26 · good 9.20 · high 31.20 · out of range poor
Thu 05:00 0.24 · good 13.20 · high 31.20 · out of range poor
Thu 06:00 0.24 · good 14.40 · high 31.20 · out of range poor
Thu 07:00 0.28 · good 15.30 · high 31.20 · out of range poor
Thu 08:00 0.30 · good 16.90 · high 31.20 · out of range poor
Thu 09:00 0.34 · good 15.30 · high 31.20 · out of range poor
Thu 10:00 0.36 · good 12.20 · high 31.20 · out of range poor
Thu 11:00 0.36 · good 7.00 · high 31.20 · out of range poor
Thu 12:00 0.38 · high 10.10 · high 31.20 · out of range poor
Thu 13:00 0.38 · high 9.40 · high 31.20 · out of range poor
Thu 14:00 0.38 · high 10.70 · high 31.20 · out of range poor
Thu 15:00 0.38 · high 12.40 · high 31.20 · out of range poor
Thu 16:00 0.38 · high 10.40 · high 31.10 · out of range poor
Thu 17:00 0.36 · good 11.80 · high 31.10 · out of range poor
Thu 18:00 0.36 · good 8.70 · high 31.10 · out of range poor
Thu 19:00 0.34 · good 3.30 · good 31.10 · out of range poor
Thu 20:00 0.32 · good 2.20 · good 31.00 · out of range poor
Thu 21:00 0.30 · good 2.30 · good 31.00 · out of range poor
Thu 22:00 0.28 · good 1.50 · good 31.00 · out of range poor
Thu 23:00 0.26 · good 4.40 · good 31.00 · out of range poor
Fri 00:00 0.24 · good 6.40 · high 31.00 · out of range poor
Fri 01:00 0.24 · good 6.00 · high 31.00 · out of range poor
Fri 02:00 0.22 · good 3.10 · good 31.00 · out of range fair
Fri 03:00 0.22 · good 13.10 · high 31.10 · out of range poor
Fri 04:00 0.22 · good 4.70 · good 31.10 · out of range poor
Fri 05:00 0.20 · good 10.60 · high 31.20 · out of range poor
Fri 06:00 0.20 · good 12.30 · high 31.20 · out of range poor
Fri 07:00 0.20 · good 16.10 · high 31.20 · out of range poor
Fri 08:00 0.22 · good 8.90 · high 31.20 · out of range poor
Fri 09:00 0.22 · good 11.10 · high 31.30 · out of range poor
Fri 10:00 0.24 · good 11.10 · high 31.20 · out of range poor
Fri 11:00 0.24 · good 10.60 · high 31.20 · out of range poor
Fri 12:00 0.26 · good 8.90 · high 31.20 · out of range poor
Fri 13:00 0.26 · good 7.50 · high 31.20 · out of range poor
Fri 14:00 0.26 · good 9.40 · high 31.20 · out of range poor
Fri 15:00 0.26 · good 7.60 · high 31.20 · out of range poor
Fri 16:00 0.24 · good 9.60 · high 31.10 · out of range poor
Fri 17:00 0.24 · good 8.50 · high 31.10 · out of range poor
Fri 18:00 0.22 · good 10.90 · high 31.10 · out of range poor
Fri 19:00 0.22 · good 7.80 · high 31.00 · out of range poor
Fri 20:00 0.22 · good 5.30 · good 31.00 · out of range poor
Fri 21:00 0.22 · good 3.30 · good 31.00 · out of range poor
Fri 22:00 0.22 · good 3.10 · good 31.00 · out of range poor
Fri 23:00 0.22 · good 3.10 · good 30.90 · out of range poor
Sat 00:00 0.22 · good 9.80 · high 30.90 · out of range poor
Sat 01:00 0.22 · good 5.50 · high 30.90 · out of range poor
Sat 02:00 0.20 · good 2.80 · good 31.00 · out of range fair
Sat 03:00 0.20 · good 3.40 · good 31.00 · out of range fair
Sat 04:00 0.20 · good 8.20 · high 31.00 · out of range poor