MARINE REPORT / 72 HOURS

Railay Snorkel Report Today

Thailand · Updated Mon 13:22 (+07) · Source: Snapshot

The skinny

Go in the best window Data updated Mon 13:22 (+07)

Railay has a usable snorkeling window around Mon 15:00. The main thing to watch is sea temperature.

Right now (forecast)

Excellent · 7.7/10

Mon 14:00 (+07)

Later today

Excellent · 7.9/10

Mon 16:00 (+07)

Next three days

Excellent · 8.6/10

Thu 08:00 (+07)

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

Score: 7.9/10

Best time: Mon 15:00

Main risk: Sea Temperature

No useful morning window is showing yet.

Best afternoon signal: Mon 16:00 (Excellent). Peak afternoon wind is about 2.3 m/s.

Email me when it is good

Sunrise

06:11

Sunset

18:07

Water

31.4°C

Max air

27.0°C

Sky

Cloudy

93% cloud

Good model window in the next 72 hours

Next good model window: Mon 15:00–18:00 (49% 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 15:00 and lasts until 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (70 hours)
  • Darkness (36 hours)

Jellyfish drift risk

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

Low · 25/100

Low peak drift risk around Mon 19:00.

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: Tue 05:00

Mon 17:00, Tue 05:00, Tue 18:00, Wed 19:00, Thu 07:00

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

Sat 14:00 – Tue 14:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.65 around Sun 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.

11/24 sampled hours stay at or below 0.36m (range 0.3m to 0.62m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.57 to 5.2m/s).

Tides range from 0.17m to 0.83m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview
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
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
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
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
Sat 14:00 0.62 · high 5.20 · good 30.00 · good Fair
Sat 15:00 0.62 · high 4.59 · good 30.00 · good Fair
Sat 16:00 0.62 · high 4.77 · good 29.90 · good Fair
Sat 17:00 0.62 · high 4.14 · good 29.90 · good Fair
Sat 18:00 0.60 · high 4.30 · good 29.90 · good Fair
Sat 19:00 0.50 · high 2.90 · good 30.00 · good Poor
Sat 20:00 0.50 · high 3.36 · good 30.00 · good Poor
Sat 21:00 0.48 · high 3.21 · good 29.90 · good Poor
Sat 22:00 0.48 · high 3.97 · good 29.90 · good Poor
Sat 23:00 0.52 · high 3.38 · good 29.90 · good Poor
Sun 00:00 0.54 · high 3.22 · good 29.90 · good Poor
Sun 01:00 0.38 · high 1.91 · good 29.90 · good Poor
Sun 02:00 0.38 · high 1.57 · good 29.80 · good Poor
Sun 03:00 0.36 · good 2.03 · good 29.80 · good Poor
Sun 04:00 0.36 · good 0.97 · good 29.80 · good Poor
Sun 05:00 0.36 · good 2.35 · good 29.70 · good Poor
Sun 06:00 0.34 · good 0.57 · good 29.70 · good Poor
Sun 07:00 0.34 · good 1.46 · good 29.70 · good Good
Sun 08:00 0.34 · good 1.68 · good 29.80 · good Good
Sun 09:00 0.32 · good 2.45 · good 29.80 · good Good
Sun 10:00 0.32 · good 1.62 · good 29.90 · good Good
Sun 11:00 0.32 · good 2.32 · good 30.00 · good Good
Sun 12:00 0.30 · good 1.76 · good 30.00 · good Good
Sun 13:00 0.30 · good 2.84 · good 30.10 · good Good
Sun 14:00 0.28 · good 2.87 · good 30.10 · good Good
Sun 15:00 0.28 · good 2.85 · good 30.10 · good Good
Sun 16:00 0.26 · good 2.25 · good 30.10 · good Good
Sun 17:00 0.26 · good 1.75 · good 30.10 · good Good
Sun 18:00 0.24 · good 1.64 · good 29.80 · good Good
Sun 19:00 0.24 · good 0.85 · good 29.80 · good Poor
Sun 20:00 0.24 · good 0.40 · good 29.80 · good Poor
Sun 21:00 0.22 · good 0.07 · good 29.80 · good Poor
Sun 22:00 0.22 · good 0.76 · good 29.80 · good Poor
Sun 23:00 0.22 · good 0.94 · good 29.80 · good Poor
Mon 00:00 0.20 · good 0.90 · good 29.80 · good Poor
Mon 01:00 0.20 · good 0.92 · good 29.80 · good Poor
Mon 02:00 0.20 · good 0.36 · good 29.80 · good Poor
Mon 03:00 0.20 · good 0.83 · good 29.80 · good Poor
Mon 04:00 0.20 · good 0.45 · good 29.80 · good Poor
Mon 05:00 0.20 · good 0.32 · good 29.70 · good Poor
Mon 06:00 0.18 · good 0.90 · good 29.70 · good Poor
Mon 07:00 0.18 · good 1.05 · good 29.70 · good Excellent
Mon 08:00 0.18 · good 1.94 · good 29.70 · good Good
Mon 09:00 0.16 · good 1.95 · good 29.70 · good Good
Mon 10:00 0.16 · good 2.07 · good 29.80 · good Good
Mon 11:00 0.16 · good 2.07 · good 29.80 · good Good
Mon 12:00 0.14 · good 2.27 · good 29.80 · good Good
Mon 13:00 0.14 · good 1.75 · good 29.80 · good Good
Mon 14:00 0.14 · good 1.58 · good 29.80 · good Excellent
Mon 15:00 0.14 · good 1.71 · good 29.90 · good Excellent
Mon 16:00 0.14 · good 1.64 · good 29.90 · good Excellent
Mon 17:00 0.14 · good 1.56 · good 29.90 · good Excellent
Mon 18:00 0.12 · good 1.46 · good 30.10 · good Excellent
Mon 19:00 0.12 · good 0.47 · good 30.10 · good Poor
Mon 20:00 0.12 · good 0.75 · good 30.10 · good Poor
Mon 21:00 0.12 · good 0.70 · good 30.10 · good Poor
Mon 22:00 0.12 · good 0.66 · good 30.00 · good Poor
Mon 23:00 0.12 · good 1.08 · good 30.00 · good Poor
Tue 00:00 0.12 · good 0.67 · good 30.00 · good Poor
Tue 01:00 0.12 · good 0.63 · good 30.00 · good Poor
Tue 02:00 0.12 · good 0.10 · good 30.00 · good Poor
Tue 03:00 0.12 · good 0.43 · good 29.90 · good Poor
Tue 04:00 0.12 · good 1.10 · good 29.90 · good Poor
Tue 05:00 0.12 · good 1.46 · good 29.90 · good Poor
Tue 06:00 0.10 · good 1.17 · good 29.90 · good Poor
Tue 07:00 0.10 · good 0.57 · good 29.90 · good Excellent
Tue 08:00 0.10 · good 1.13 · good 30.00 · good Excellent
Tue 09:00 0.10 · good 1.00 · good 30.10 · good Excellent
Tue 10:00 0.10 · good 0.83 · good 30.20 · good Excellent
Tue 11:00 0.10 · good 2.01 · good 30.20 · good Excellent
Tue 12:00 0.10 · good 2.77 · good 30.30 · good Excellent
Tue 13:00 0.10 · good 2.97 · good 30.40 · good Excellent