SnorkelForecast.com

Railay Snorkel Report Today

Thailand · Updated Tue 04:15 (+07) · Source: Snapshot · Showing fallback/stale data

The skinny

Go in the best window Report Thu 01:09

Railay has a usable snorkeling window around Thu 07:00. The main thing to watch is sea temperature.

Score: 7.6/10

Best time: Thu 07:00

Main risk: Sea Temperature

Best morning signal: Thu 11:00 (Excellent).

Best afternoon signal: Thu 12:00 (Good). Peak afternoon wind is about 4.7 m/s.

Email me when it is good

Sunrise

06:15

Sunset

18:46

Water

31.0°C

Max air

29.7°C

Sky

Cloudy

83% cloud

Good window is available today

Next safe window: Thu 00:00–11:00 (48% of next 72h are suitable)

3-day planner Best available Show data

3-day planner

Thursday

✅ excellent conditions

Main blocker: Sea temperature

Friday

✅ excellent conditions

Main blocker: Sea temperature

Best available hours

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

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (33 hours)
  • Darkness (17 hours)
  • Tide/current (2 hours)

Jellyfish drift risk

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

Low · 29/100

Low peak drift risk around Thu 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: Wed 22:00

Wed 22:00, Thu 10:00, Thu 23:00

Nearby alternatives in Thailand

Koh Phi Phi

31 km away

✅ Good

Koh Kradan

94 km away

✅ Good

Similan Islands

149 km away

❌ Poor

Koh Lipe

177 km away

✅ Good

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 07:00; 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 0.58m to 0.74m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 7.3 to 24.7m/s).

Tides range from -0.46m to 1.8m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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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 0.66 · high 16.70 · high 30.50 · out of range poor
Tue 19:00 0.68 · high 22.20 · high 30.50 · out of range poor
Tue 20:00 0.72 · high 7.30 · high 30.40 · good poor
Tue 21:00 0.74 · high 16.40 · high 30.40 · good poor
Tue 22:00 0.68 · high 23.10 · high 30.40 · good poor
Tue 23:00 0.64 · high 16.70 · high 30.40 · good poor
Wed 00:00 0.58 · high 14.40 · high 30.40 · good poor
Wed 01:00 0.62 · high 18.00 · high 30.40 · good poor
Wed 02:00 0.68 · high 21.10 · high 30.40 · good poor
Wed 03:00 0.72 · high 17.90 · high 30.40 · good poor
Wed 04:00 0.72 · high 24.70 · high 30.40 · good poor
Wed 05:00 0.70 · high 20.60 · high 30.50 · out of range poor
Wed 06:00 0.70 · high 16.10 · high 30.50 · out of range poor
Wed 07:00 0.68 · high 18.20 · high 30.50 · out of range poor
Wed 08:00 0.66 · high 19.40 · high 30.50 · out of range poor
Wed 09:00 0.64 · high 22.80 · high 30.50 · out of range poor
Wed 10:00 0.66 · high 23.90 · high 30.50 · out of range poor
Wed 11:00 0.66 · high 21.40 · high 30.50 · out of range poor
Wed 12:00 0.68 · high 14.10 · high 30.50 · out of range poor
Wed 13:00 0.66 · high 15.70 · high 30.50 · out of range poor
Wed 14:00 0.66 · high 15.90 · high 30.40 · good poor
Wed 15:00 0.64 · high 13.90 · high 30.40 · good poor
Wed 16:00 0.64 · high 13.50 · high 30.40 · good poor
Wed 17:00 0.66 · high 15.00 · high 30.40 · good poor
Wed 18:00 0.66 · high 21.80 · high 30.30 · good poor
Wed 19:00 0.66 · high 15.90 · high 30.30 · good poor
Wed 20:00 0.64 · high 13.70 · high 30.30 · good poor
Wed 21:00 0.64 · high 16.20 · high 30.20 · good poor
Wed 22:00 0.62 · high 12.80 · high 30.20 · good poor
Wed 23:00 0.60 · high 12.50 · high 30.20 · good poor
Thu 00:00 0.58 · high 16.20 · high 30.20 · good poor
Thu 01:00 0.56 · high 12.80 · high 30.20 · good poor
Thu 02:00 0.56 · high 14.80 · high 30.20 · good poor
Thu 03:00 0.54 · high 14.50 · high 30.20 · good poor
Thu 04:00 0.56 · high 14.30 · high 30.20 · good poor
Thu 05:00 0.58 · high 17.50 · high 30.20 · good poor
Thu 06:00 0.60 · high 23.20 · high 30.20 · good poor
Thu 07:00 0.62 · high 18.00 · high 30.20 · good poor
Thu 08:00 0.66 · high 15.70 · high 30.20 · good poor
Thu 09:00 0.68 · high 18.00 · high 30.20 · good poor
Thu 10:00 0.66 · high 20.50 · high 30.10 · good poor
Thu 11:00 0.66 · high 17.30 · high 30.10 · good poor
Thu 12:00 0.64 · high 14.60 · high 30.10 · good poor
Thu 13:00 0.64 · high 12.10 · high 30.10 · good poor
Thu 14:00 0.62 · high 13.60 · high 30.10 · good poor
Thu 15:00 0.62 · high 12.80 · high 30.10 · good poor
Thu 16:00 0.58 · high 19.00 · high 30.10 · good poor
Thu 17:00 0.56 · high 15.20 · high 30.00 · good poor
Thu 18:00 0.52 · high 16.70 · high 30.00 · good poor
Thu 19:00 0.52 · high 12.40 · high 30.00 · good poor
Thu 20:00 0.52 · high 9.90 · high 30.00 · good poor
Thu 21:00 0.52 · high 10.50 · high 29.90 · good poor
Thu 22:00 0.50 · high 17.10 · high 29.90 · good poor
Thu 23:00 0.46 · high 17.30 · high 29.90 · good poor
Fri 00:00 0.44 · high 10.60 · high 29.90 · good poor
Fri 01:00 0.46 · high 11.60 · high 29.90 · good poor
Fri 02:00 0.46 · high 12.30 · high 29.90 · good poor
Fri 03:00 0.48 · high 11.60 · high 29.90 · good poor
Fri 04:00 0.50 · high 21.50 · high 29.90 · good poor
Fri 05:00 0.54 · high 17.00 · high 30.00 · good poor
Fri 06:00 0.56 · high 18.80 · high 30.00 · good poor
Fri 07:00 0.56 · high 18.40 · high 30.00 · good poor
Fri 08:00 0.54 · high 18.50 · high 30.00 · good poor
Fri 09:00 0.54 · high 18.40 · high 30.00 · good poor
Fri 10:00 0.54 · high 18.70 · high 30.00 · good poor
Fri 11:00 0.60 · high 15.60 · high 30.20 · good poor
Fri 12:00 0.58 · high 13.80 · high 30.20 · good poor
Fri 13:00 0.54 · high 13.90 · high 30.20 · good poor
Fri 14:00 0.52 · high 13.70 · high 30.10 · good poor
Fri 15:00 0.48 · high 11.90 · high 30.10 · good poor
Fri 16:00 0.48 · high 8.80 · high 30.10 · good poor
Fri 17:00 0.46 · high 11.10 · high 30.10 · good poor