MARINE REPORT / 72 HOURS

Railay Snorkel Report Today

Thailand · Updated Mon 00:51 (+07) · Source: Snapshot

The skinny

Go in the best window Data updated Mon 00:51 (+07)

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

Right now (forecast)

Poor · 0.0/10

Mon 00:00 (+07)

Later today

Excellent · 8.2/10

Mon 18:00 (+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: 8.2/10

Best time: Mon 07:00

Main risk: Sea Temperature

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

Best afternoon signal: Mon 18:00 (Excellent). Peak afternoon wind is about 2.9 m/s.

Email me when it is good

Sunrise

06:11

Sunset

18:07

Water

31.5°C

Max air

29.2°C

Sky

Partly cloudy

44% cloud

Good model window in the next 72 hours

Next good model window: Mon 07:00–18:00 (51% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Monday

✅ Excellent conditions

Main blocker: Sea temperature

Tuesday

✅ Excellent conditions

Main blocker: Sea temperature

Wednesday

✅ Excellent conditions

Main blocker: Sea temperature

Best available hours

The next good model window starts at Mon 07:00 and lasts until 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (71 hours)
  • Darkness (35 hours)

Jellyfish drift risk

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

Low · 25/100

Low peak drift risk around Mon 04:00.

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, Wed 19:00

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

Fri 00:00 – Mon 00:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.76 around Fri 08:00; 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 0.06m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.21 to 3.08m/s).

Tides range from -0.42m to 1.55m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
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
Good 🌟 Good
Excellent ✅ Excellent
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
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Fri 00:00 0.06 · good 0.85 · good 30.70 · out of range Poor
Fri 01:00 0.06 · good 0.21 · good 30.70 · out of range Poor
Fri 02:00 0.06 · good 1.30 · good 30.70 · out of range Poor
Fri 03:00 0.04 · good 1.32 · good 30.70 · out of range Poor
Fri 04:00 0.04 · good 1.37 · good 30.60 · out of range Poor
Fri 05:00 0.04 · good 0.65 · good 30.60 · out of range Poor
Fri 06:00 0.04 · good 1.17 · good 30.60 · out of range Poor
Fri 07:00 0.04 · good 1.77 · good 30.60 · out of range Excellent
Fri 08:00 0.04 · good 0.80 · good 30.70 · out of range Excellent
Fri 09:00 0.04 · good 0.56 · good 30.70 · out of range Excellent
Fri 10:00 0.04 · good 0.74 · good 30.80 · out of range Excellent
Fri 11:00 0.04 · good 1.39 · good 30.90 · out of range Excellent
Fri 12:00 0.04 · good 2.41 · good 30.90 · out of range Good
Fri 13:00 0.04 · good 2.76 · good 31.00 · out of range Good
Fri 14:00 0.04 · good 3.08 · good 31.00 · out of range Excellent
Fri 15:00 0.04 · good 2.54 · good 31.00 · out of range Good
Fri 16:00 0.04 · good 2.23 · good 31.00 · out of range Good
Fri 17:00 0.04 · good 1.23 · good 31.00 · out of range Excellent
Fri 18:00 0.04 · good 0.74 · good 31.00 · out of range Excellent
Fri 19:00 0.04 · good 2.21 · good 31.00 · out of range Poor
Fri 20:00 0.04 · good 1.77 · good 31.00 · out of range Poor
Fri 21:00 0.04 · good 0.21 · good 30.90 · out of range Poor
Fri 22:00 0.04 · good 0.30 · good 30.90 · out of range Poor
Fri 23:00 0.04 · good 0.56 · good 30.90 · out of range Poor
Sat 00:00 0.04 · good 1.04 · good 30.90 · out of range Poor
Sat 01:00 0.04 · good 1.63 · good 30.90 · out of range Poor
Sat 02:00 0.04 · good 1.00 · good 30.90 · out of range Poor
Sat 03:00 0.04 · good 0.49 · good 30.80 · out of range Poor
Sat 04:00 0.04 · good 0.85 · good 30.80 · out of range Poor
Sat 05:00 0.04 · good 0.05 · good 30.80 · out of range Poor
Sat 06:00 0.04 · good 2.04 · good 30.80 · out of range Poor
Sat 07:00 0.04 · good 1.75 · good 30.80 · out of range Excellent
Sat 08:00 0.04 · good 1.36 · good 30.80 · out of range Excellent
Sat 09:00 0.04 · good 1.30 · good 30.90 · out of range Excellent
Sat 10:00 0.04 · good 1.55 · good 30.90 · out of range Excellent
Sat 11:00 0.04 · good 1.74 · good 31.00 · out of range Excellent
Sat 12:00 0.04 · good 2.54 · good 31.00 · out of range Excellent
Sat 13:00 0.04 · good 2.95 · good 31.10 · out of range Good
Sat 14:00 0.04 · good 2.47 · good 31.10 · out of range Excellent
Sat 15:00 0.04 · good 2.95 · good 31.10 · out of range Excellent
Sat 16:00 0.04 · good 2.55 · good 31.10 · out of range Good
Sat 17:00 0.08 · good 2.60 · good 31.10 · out of range Good
Sat 18:00 0.04 · good 2.17 · good 30.90 · out of range Good
Sat 19:00 0.04 · good 1.65 · good 30.90 · out of range Poor
Sat 20:00 0.06 · good 2.39 · good 30.90 · out of range Poor
Sat 21:00 0.06 · good 2.48 · good 30.90 · out of range Poor
Sat 22:00 0.08 · good 2.05 · good 30.90 · out of range Poor
Sat 23:00 0.10 · good 2.04 · good 30.90 · out of range Poor
Sun 00:00 0.10 · good 1.72 · good 30.80 · out of range Poor
Sun 01:00 0.10 · good 1.98 · good 30.80 · out of range Poor
Sun 02:00 0.10 · good 2.62 · good 30.80 · out of range Poor
Sun 03:00 0.10 · good 2.29 · good 30.80 · out of range Poor
Sun 04:00 0.10 · good 1.68 · good 30.70 · out of range Poor
Sun 05:00 0.10 · good 0.50 · good 30.70 · out of range Poor
Sun 06:00 0.12 · good 1.63 · good 30.70 · out of range Poor
Sun 07:00 0.12 · good 1.32 · good 30.70 · out of range Excellent
Sun 08:00 0.12 · good 1.08 · good 30.80 · out of range Excellent
Sun 09:00 0.12 · good 1.31 · good 30.80 · out of range Excellent
Sun 10:00 0.12 · good 1.32 · good 30.90 · out of range Good
Sun 11:00 0.10 · good 2.34 · good 31.00 · out of range Good
Sun 12:00 0.10 · good 2.34 · good 31.10 · out of range Excellent
Sun 13:00 0.08 · good 2.72 · good 31.10 · out of range Excellent
Sun 14:00 0.08 · good 3.66 · good 31.10 · out of range Good
Sun 15:00 0.08 · good 3.51 · good 31.10 · out of range Good
Sun 16:00 0.08 · good 2.86 · good 31.10 · out of range Good
Sun 17:00 0.08 · good 2.75 · good 31.10 · out of range Good
Sun 18:00 0.12 · good 2.98 · good 31.10 · out of range Good
Sun 19:00 0.14 · good 2.62 · good 31.10 · out of range Poor
Sun 20:00 0.16 · good 2.12 · good 31.10 · out of range Poor
Sun 21:00 0.18 · good 1.87 · good 31.10 · out of range Poor
Sun 22:00 0.20 · good 1.64 · good 31.10 · out of range Poor
Sun 23:00 0.18 · good 1.79 · good 31.10 · out of range Poor