MARINE REPORT / 72 HOURS

Railay Snorkel Report Today

Thailand · Updated Sun 12:14 (+07) · Source: Snapshot

The skinny

Go in the best window Data updated Sun 12:14 (+07)

Railay has a usable snorkeling window around Sun 13:00. The main thing to watch is sea temperature.

Right now (forecast)

Excellent · 7.3/10

Sun 12:00 (+07)

Later today

Excellent · 7.6/10

Sun 18:00 (+07)

Next three days

Excellent · 8.2/10

Mon 16:00 (+07)

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

Score: 7.6/10

Best time: Sun 13:00

Main risk: Sea Temperature

No useful morning window is showing yet.

Best afternoon signal: Sun 18:00 (Excellent). Peak afternoon wind is about 4.2 m/s.

Email me when it is good

Sunrise

06:11

Sunset

18:07

Water

31.7°C

Max air

26.9°C

Sky

Cloudy

100% cloud

Good model window in the next 72 hours

Next good model window: Sun 13:00–18:00 (49% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Sunday

✅ Excellent conditions

Main blocker: Sea temperature

Monday

✅ Excellent conditions

Main blocker: Sea temperature

Tuesday

✅ Excellent conditions

Main blocker: Sea temperature

Best available hours

The next good model window starts at Sun 13:00 and lasts until 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (71 hours)
  • Darkness (36 hours)

Jellyfish drift risk

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

Low · 27/100

Low peak drift risk around Sun 18:00.

warm water supports seasonal jellyfish activity; 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: Mon 02:00

Mon 02:00, Mon 17:00, Tue 05:00, Tue 18:00

Nearby alternatives in Thailand

Koh Phi Phi

31 km away

✅ Good

Koh Kradan

94 km away

✅ Good

Similan Islands

149 km away

✅ Good

Koh Lipe

177 km away

✅ Good

Advanced forecast data

Viewing historical data

Wed 12:00 – Sat 12:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.75 around Wed 13:00; 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 0.16m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.16 to 2.51m/s).

Tides range from -0.54m to 1.62m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview
Good 🌟 Good
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Good 🌟 Good
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Excellent ✅ Excellent
Good 🌟 Good
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
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 12:00 0.04 · good 1.48 · good 31.50 · out of range Good
Wed 13:00 0.04 · good 2.51 · good 31.50 · out of range Excellent
Wed 14:00 0.04 · good 2.44 · good 31.50 · out of range Good
Wed 15:00 0.04 · good 1.66 · good 31.50 · out of range Good
Wed 16:00 0.04 · good 2.00 · good 31.50 · out of range Good
Wed 17:00 0.04 · good 1.62 · good 31.50 · out of range Good
Wed 18:00 0.04 · good 0.96 · good 31.30 · out of range Good
Wed 19:00 0.04 · good 1.95 · good 31.30 · out of range Poor
Wed 20:00 0.04 · good 1.29 · good 31.30 · out of range Poor
Wed 21:00 0.04 · good 1.41 · good 31.30 · out of range Poor
Wed 22:00 0.16 · good 1.07 · good 31.20 · out of range Poor
Wed 23:00 0.16 · good 0.76 · good 31.20 · out of range Poor
Thu 00:00 0.14 · good 0.64 · good 31.20 · out of range Poor
Thu 01:00 0.14 · good 0.16 · good 31.20 · out of range Poor
Thu 02:00 0.14 · good 0.55 · good 31.20 · out of range Poor
Thu 03:00 0.12 · good 0.54 · good 31.20 · out of range Poor
Thu 04:00 0.12 · good 1.38 · good 31.10 · out of range Poor
Thu 05:00 0.12 · good 1.07 · good 31.10 · out of range Poor
Thu 06:00 0.10 · good 0.86 · good 31.10 · out of range Poor
Thu 07:00 0.10 · good 1.60 · good 31.10 · out of range Good
Thu 08:00 0.10 · good 1.96 · good 31.20 · out of range Good
Thu 09:00 0.08 · good 1.05 · good 31.20 · out of range Good
Thu 10:00 0.08 · good 1.36 · good 31.30 · out of range Good
Thu 11:00 0.08 · good 1.11 · good 31.40 · out of range Good
Thu 12:00 0.08 · good 2.37 · good 31.50 · out of range Good
Thu 13:00 0.08 · good 1.60 · good 31.50 · out of range Excellent
Thu 14:00 0.08 · good 2.31 · good 31.50 · out of range Good
Thu 15:00 0.06 · good 1.77 · good 31.50 · out of range Good
Thu 16:00 0.06 · good 2.08 · good 31.50 · out of range Good
Thu 17:00 0.06 · good 1.46 · good 31.50 · out of range Good
Thu 18:00 0.04 · good 0.72 · good 31.40 · out of range Excellent
Thu 19:00 0.06 · good 1.67 · good 31.50 · out of range Poor
Thu 20:00 0.06 · good 2.07 · good 31.50 · out of range Poor
Thu 21:00 0.04 · good 1.59 · good 31.40 · out of range Poor
Thu 22:00 0.04 · good 1.59 · good 31.40 · out of range Poor
Thu 23:00 0.06 · good 0.67 · good 31.40 · out of range Poor
Fri 00:00 0.04 · good 0.88 · good 31.30 · out of range Poor
Fri 01:00 0.04 · good 0.75 · good 31.30 · out of range Poor
Fri 02:00 0.04 · good 0.64 · good 31.30 · out of range Poor
Fri 03:00 0.04 · good 0.64 · good 31.30 · out of range Poor
Fri 04:00 0.04 · good 0.94 · good 31.20 · out of range Poor
Fri 05:00 0.04 · good 1.33 · good 31.20 · out of range Poor
Fri 06:00 0.04 · good 1.50 · good 31.20 · out of range Poor
Fri 07:00 0.04 · good 1.48 · good 31.20 · out of range Good
Fri 08:00 0.04 · good 1.57 · good 31.30 · out of range Good
Fri 09:00 0.04 · good 0.72 · good 31.40 · out of range Excellent
Fri 10:00 0.04 · good 0.32 · good 31.50 · out of range Excellent
Fri 11:00 0.04 · good 0.82 · good 31.60 · out of range Excellent
Fri 12:00 0.04 · good 1.60 · good 31.60 · out of range Good
Fri 13:00 0.04 · good 1.87 · good 31.70 · out of range Excellent
Fri 14:00 0.04 · good 3.54 · good 31.70 · out of range Good
Fri 15:00 0.04 · good 0.18 · good 31.70 · out of range Excellent
Fri 16:00 0.04 · good 1.05 · good 31.60 · out of range Good
Fri 17:00 0.04 · good 1.26 · good 31.60 · out of range Good
Fri 18:00 0.04 · good 2.66 · good 31.50 · out of range Good
Fri 19:00 0.04 · good 2.28 · good 31.40 · out of range Poor
Fri 20:00 0.04 · good 1.35 · good 31.40 · out of range Poor
Fri 21:00 0.04 · good 1.72 · good 31.40 · out of range Poor
Fri 22:00 0.04 · good 1.93 · good 31.40 · out of range Poor
Fri 23:00 0.04 · good 1.57 · good 31.40 · out of range Poor
Sat 00:00 0.04 · good 1.55 · good 31.30 · out of range Poor
Sat 01:00 0.04 · good 1.20 · good 31.30 · out of range Poor
Sat 02:00 0.04 · good 1.87 · good 31.30 · out of range Poor
Sat 03:00 0.04 · good 1.95 · good 31.30 · out of range Poor
Sat 04:00 0.04 · good 0.21 · good 31.20 · out of range Poor
Sat 05:00 0.04 · good 0.40 · good 31.20 · out of range Poor
Sat 06:00 0.04 · good 1.60 · good 31.20 · out of range Poor
Sat 07:00 0.04 · good 1.50 · good 31.20 · out of range Good
Sat 08:00 0.04 · good 1.43 · good 31.30 · out of range Excellent
Sat 09:00 0.04 · good 1.51 · good 31.30 · out of range Excellent
Sat 10:00 0.04 · good 1.92 · good 31.40 · out of range Excellent
Sat 11:00 0.04 · good 1.70 · good 31.50 · out of range Excellent