SnorkelForecast.com

Railay Snorkel Report Today

Thailand · Updated Wed 03:57 (+07) · Source: Snapshot

The skinny

Go in the best window Report Wed 11:21

Railay has a usable snorkeling window around Wed 12:00. The main thing to watch is darkness.

Score: 6.2/10

Best time: Wed 12:00

Main risk: Darkness

No useful morning window is showing yet.

Best afternoon signal: Wed 12:00 (Good). Peak afternoon wind is about 5.3 m/s.

Email me when it is good

Sunrise

06:16

Sunset

18:32

Water

30.7°C

Max air

31.3°C

Sky

Partly cloudy

59% cloud

Good window is available today

Next good model window: Wed 05:00–06:00 (30% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Wednesday

✅ Good conditions

Main blocker: Sea temperature

Thursday

✅ Good conditions

Main blocker: Sea temperature

Friday

✅ Good conditions

Main blocker: Darkness

Best available hours

The next good model window starts at Wed 05:00 and lasts until 06:00.

Why this verdict

Main blockers across the next 72 hours:

  • Darkness (36 hours)
  • Sea temperature (35 hours)
  • Waves (16 hours)

Jellyfish drift risk

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

Low · 29/100

Low peak drift risk around Wed 13:00.

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 18:00

Wed 18:00, Thu 06:00, Thu 19:00, Fri 07:00, Fri 20:00

Nearby alternatives in Thailand

Koh Phi Phi

31 km away

⚠️ Fair

Koh Kradan

94 km away

⚠️ Fair

Similan Islands

149 km away

❌ Poor

Koh Lipe

177 km away

⚠️ Fair

Advanced forecast data

Viewing current forecast

Wed 04:00 – Sat 04:00 (+07)

Previous day Yesterday

Snorkel Score (next 24h)

Best snorkel score is 0.62 around Wed 12:00; 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.

17/24 sampled hours stay at or below 0.36m (range 0.26m to 0.52m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 1.72 to 5.35m/s).

Tides range from -0.54m to 1.55m; 1 of 24 hours are in or near peak slack windows.

72-hour forecast overview
Good 🌟 Good
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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
Good 🌟 Good
Fair ⚠️ Fair
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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
Good 🌟 Good
Good 🌟 Good
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 05:00 0.26 · good 4.16 · good 30.70 · out of range Good
Wed 06:00 0.26 · good 4.72 · good 30.70 · out of range Good
Wed 07:00 0.30 · good 4.75 · good 30.70 · out of range Fair
Wed 08:00 0.34 · good 4.67 · good 30.70 · out of range Fair
Wed 09:00 0.38 · high 5.35 · good 30.70 · out of range Fair
Wed 10:00 0.42 · high 3.94 · good 30.70 · out of range Fair
Wed 11:00 0.48 · high 4.10 · good 30.60 · out of range Fair
Wed 12:00 0.52 · high 3.58 · good 30.60 · out of range Poor
Wed 13:00 0.48 · high 3.52 · good 30.60 · out of range Poor
Wed 14:00 0.44 · high 3.09 · good 30.60 · out of range Poor
Wed 15:00 0.40 · high 4.85 · good 30.60 · out of range Poor
Wed 16:00 0.36 · good 2.84 · good 30.50 · out of range Poor
Wed 17:00 0.30 · good 2.44 · good 30.50 · out of range Poor
Wed 18:00 0.26 · good 2.45 · good 30.50 · out of range Poor
Wed 19:00 0.28 · good 2.77 · good 30.50 · out of range Poor
Wed 20:00 0.28 · good 1.72 · good 30.40 · good Poor
Wed 21:00 0.30 · good 1.98 · good 30.40 · good Poor
Wed 22:00 0.30 · good 2.10 · good 30.40 · good Poor
Wed 23:00 0.28 · good 4.97 · good 30.40 · good Poor
Thu 00:00 0.28 · good 3.07 · good 30.40 · good Good
Thu 01:00 0.28 · good 3.49 · good 30.40 · good Good
Thu 02:00 0.26 · good 2.59 · good 30.40 · good Good
Thu 03:00 0.26 · good 3.21 · good 30.40 · good Good
Thu 04:00 0.28 · good 3.15 · good 30.50 · out of range Good
Thu 05:00 0.32 · good 3.39 · good 30.50 · out of range Good
Thu 06:00 0.34 · good 3.73 · good 30.50 · out of range Good
Thu 07:00 0.36 · good 3.69 · good 30.50 · out of range Good
Thu 08:00 0.36 · good 6.64 · high 30.50 · out of range Fair
Thu 09:00 0.38 · high 4.40 · good 30.50 · out of range Fair
Thu 10:00 0.38 · high 4.48 · good 30.50 · out of range Fair
Thu 11:00 0.36 · good 4.00 · good 30.50 · out of range Fair
Thu 12:00 0.36 · good 3.86 · good 30.50 · out of range Poor
Thu 13:00 0.38 · high 3.59 · good 30.50 · out of range Poor
Thu 14:00 0.40 · high 3.49 · good 30.50 · out of range Poor
Thu 15:00 0.42 · high 5.03 · good 30.50 · out of range Poor
Thu 16:00 0.40 · high 2.33 · good 30.40 · good Poor
Thu 17:00 0.40 · high 2.50 · good 30.40 · good Poor
Thu 18:00 0.38 · high 2.57 · good 30.40 · good Poor
Thu 19:00 0.36 · good 3.08 · good 30.40 · good Poor
Thu 20:00 0.32 · good 4.37 · good 30.30 · good Poor
Thu 21:00 0.30 · good 3.85 · good 30.30 · good Poor
Thu 22:00 0.30 · good 2.26 · good 30.30 · good Poor
Thu 23:00 0.32 · good 2.25 · good 30.30 · good Poor
Fri 00:00 0.32 · good 2.79 · good 30.30 · good Good
Fri 01:00 0.32 · good 3.47 · good 30.30 · good Good
Fri 02:00 0.34 · good 3.81 · good 30.30 · good Fair
Fri 03:00 0.34 · good 2.71 · good 30.40 · good Good
Fri 04:00 0.34 · good 3.72 · good 30.40 · good Good
Fri 05:00 0.34 · good 4.31 · good 30.40 · good Good
Fri 06:00 0.34 · good 4.31 · good 30.50 · out of range Good
Fri 07:00 0.36 · good 4.41 · good 30.50 · out of range Good
Fri 08:00 0.36 · good 4.57 · good 30.50 · out of range Good
Fri 09:00 0.38 · high 4.82 · good 30.50 · out of range Fair
Fri 10:00 0.36 · good 3.63 · good 30.50 · out of range Fair
Fri 11:00 0.36 · good 3.25 · good 30.50 · out of range Fair
Fri 12:00 0.34 · good 2.73 · good 30.50 · out of range Poor
Fri 13:00 0.32 · good 2.49 · good 30.50 · out of range Poor
Fri 14:00 0.30 · good 2.60 · good 30.40 · good Poor
Fri 15:00 0.28 · good 2.46 · good 30.40 · good Poor
Fri 16:00 0.30 · good 2.48 · good 30.40 · good Poor
Fri 17:00 0.30 · good 2.96 · good 30.30 · good Poor
Fri 18:00 0.32 · good 3.50 · good 30.30 · good Poor
Fri 19:00 0.32 · good 3.91 · good 30.30 · good Poor
Fri 20:00 0.32 · good 3.66 · good 30.30 · good Poor
Fri 21:00 0.32 · good 3.11 · good 30.30 · good Poor
Fri 22:00 0.30 · good 2.85 · good 30.20 · good Poor
Fri 23:00 0.28 · good 2.77 · good 30.20 · good Poor
Sat 00:00 0.26 · good 2.87 · good 30.20 · good Good
Sat 01:00 0.26 · good 3.28 · good 30.20 · good Good
Sat 02:00 0.26 · good 3.63 · good 30.30 · good Good