MARINE REPORT / 72 HOURS

Railay Snorkel Report Today

Thailand · Updated Sun 05:59 (+07) · Source: Snapshot

The skinny

Go in the best window Data updated Sun 05:59 (+07)

Railay has a usable snorkeling window around Sun 09:00. The main thing to watch is sea temperature.

Right now (forecast)

Excellent · 7.7/10

Sun 08:00 (+07)

Later today

Excellent · 7.8/10

Sun 10:00 (+07)

Next three days

Excellent · 8.2/10

Mon 18:00 (+07)

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

Score: 7.8/10

Best time: Sun 09:00

Main risk: Sea Temperature

Best morning signal: Sun 10:00 (Excellent).

Best afternoon signal: Sun 13:00 (Excellent). Peak afternoon wind is about 2.3 m/s.

Email me when it is good

Sunrise

06:11

Sunset

18:07

Water

31.5°C

Max air

30.2°C

Sky

Cloudy

81% cloud

Good model window in the next 72 hours

Next good model window: Sun 09:00–18:00 (50% 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 09:00 and lasts until 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (68 hours)
  • Darkness (34 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 current forecast

Sun 08:00 – Wed 08:00 (+07)

Previous day Yesterday

Snorkel Score (next 24h)

Best snorkel score is 0.78 around Sun 10:00; 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 0.04m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.38 to 2.31m/s).

Tides range from -0.01m to 0.85m; 1 of 24 hours are in or near peak slack windows.

72-hour forecast overview
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
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
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
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
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
Sun 09:00 0.04 · good 1.52 · good 31.50 · out of range Excellent
Sun 10:00 0.04 · good 0.38 · good 31.60 · out of range Excellent
Sun 11:00 0.04 · good 1.48 · good 31.60 · out of range Excellent
Sun 12:00 0.04 · good 2.19 · good 31.70 · out of range Excellent
Sun 13:00 0.04 · good 0.70 · good 31.70 · out of range Excellent
Sun 14:00 0.04 · good 2.31 · good 31.70 · out of range Good
Sun 15:00 0.04 · good 1.99 · good 31.70 · out of range Good
Sun 16:00 0.04 · good 1.12 · good 31.70 · out of range Excellent
Sun 17:00 0.04 · good 1.35 · good 31.60 · out of range Excellent
Sun 18:00 0.04 · good 0.54 · good 31.60 · out of range Excellent
Sun 19:00 0.04 · good 1.46 · good 31.60 · out of range Poor
Sun 20:00 0.04 · good 1.23 · good 31.60 · out of range Poor
Sun 21:00 0.04 · good 1.80 · good 31.50 · out of range Poor
Sun 22:00 0.04 · good 1.57 · good 31.50 · out of range Poor
Sun 23:00 0.04 · good 1.32 · good 31.50 · out of range Poor
Mon 00:00 0.04 · good 0.65 · good 31.50 · out of range Poor
Mon 01:00 0.04 · good 1.48 · good 31.50 · out of range Poor
Mon 02:00 0.04 · good 0.39 · good 31.40 · out of range Poor
Mon 03:00 0.04 · good 1.30 · good 31.40 · out of range Poor
Mon 04:00 0.04 · good 0.89 · good 31.40 · out of range Poor
Mon 05:00 0.04 · good 1.56 · good 31.30 · out of range Poor
Mon 06:00 0.04 · good 1.79 · good 31.30 · out of range Poor
Mon 07:00 0.04 · good 0.85 · good 31.30 · out of range Excellent
Mon 08:00 0.04 · good 1.67 · good 31.30 · out of range Excellent
Mon 09:00 0.04 · good 1.60 · good 31.40 · out of range Excellent
Mon 10:00 0.04 · good 1.61 · good 31.40 · out of range Excellent
Mon 11:00 0.04 · good 1.32 · good 31.50 · out of range Excellent
Mon 12:00 0.04 · good 0.76 · good 31.50 · out of range Excellent
Mon 13:00 0.04 · good 0.79 · good 31.60 · out of range Excellent
Mon 14:00 0.04 · good 1.05 · good 31.60 · out of range Excellent
Mon 15:00 0.04 · good 1.41 · good 31.60 · out of range Excellent
Mon 16:00 0.04 · good 0.43 · good 31.60 · out of range Excellent
Mon 17:00 0.04 · good 0.69 · good 31.60 · out of range Excellent
Mon 18:00 0.04 · good 0.46 · good 31.50 · out of range Excellent
Mon 19:00 0.04 · good 1.25 · good 31.50 · out of range Poor
Mon 20:00 0.04 · good 1.28 · good 31.50 · out of range Poor
Mon 21:00 0.04 · good 1.48 · good 31.50 · out of range Poor
Mon 22:00 0.04 · good 0.67 · good 31.50 · out of range Poor
Mon 23:00 0.04 · good 0.47 · good 31.50 · out of range Poor
Tue 00:00 0.04 · good 0.58 · good 31.40 · out of range Poor
Tue 01:00 0.04 · good 1.47 · good 31.40 · out of range Poor
Tue 02:00 0.04 · good 0.53 · good 31.40 · out of range Poor
Tue 03:00 0.04 · good 0.54 · good 31.40 · out of range Poor
Tue 04:00 0.04 · good 0.30 · good 31.40 · out of range Poor
Tue 05:00 0.04 · good 1.05 · good 31.30 · out of range Poor
Tue 06:00 0.04 · good 1.08 · good 31.30 · out of range Poor
Tue 07:00 0.04 · good 1.68 · good 31.30 · out of range Excellent
Tue 08:00 0.04 · good 1.96 · good 31.30 · out of range Excellent
Tue 09:00 0.04 · good 1.92 · good 31.40 · out of range Excellent
Tue 10:00 0.04 · good 0.81 · good 31.40 · out of range Excellent
Tue 11:00 0.06 · good 0.96 · good 31.40 · out of range Excellent
Tue 12:00 0.06 · good 1.83 · good 31.50 · out of range Excellent
Tue 13:00 0.08 · good 1.56 · good 31.50 · out of range Excellent
Tue 14:00 0.08 · good 2.09 · good 31.50 · out of range Good
Tue 15:00 0.08 · good 1.57 · good 31.50 · out of range Excellent
Tue 16:00 0.08 · good 1.55 · good 31.50 · out of range Excellent
Tue 17:00 0.08 · good 1.91 · good 31.50 · out of range Excellent
Tue 18:00 0.10 · good 1.94 · good 31.40 · out of range Excellent
Tue 19:00 0.10 · good 1.67 · good 31.40 · out of range Poor
Tue 20:00 0.10 · good 1.51 · good 31.40 · out of range Poor
Tue 21:00 0.08 · good 1.68 · good 31.40 · out of range Poor
Tue 22:00 0.08 · good 2.06 · good 31.40 · out of range Poor
Tue 23:00 0.08 · good 2.46 · good 31.40 · out of range Poor
Wed 00:00 0.08 · good 2.59 · good 31.30 · out of range Poor
Wed 01:00 0.08 · good 1.74 · good 31.30 · out of range Poor
Wed 02:00 0.08 · good 1.33 · good 31.30 · out of range Poor
Wed 03:00 0.08 · good 0.65 · good 31.20 · out of range Poor
Wed 04:00 0.08 · good 1.61 · good 31.20 · out of range Poor