MARINE REPORT / 72 HOURS

Railay Snorkel Report Today

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

The skinny

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

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

Right now (forecast)

Excellent · 7.6/10

Mon 08:00 (+07)

Later today

Excellent · 8.1/10

Mon 18:00 (+07)

Next three days

Excellent · 8.1/10

Mon 18:00 (+07)

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

Score: 8.1/10

Best time: Mon 09:00

Main risk: Sea Temperature

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

Best afternoon signal: Mon 18:00 (Excellent). Peak afternoon wind is about 3.1 m/s.

Email me when it is good

Sunrise

06:11

Sunset

18:07

Water

31.4°C

Max air

28.5°C

Sky

Cloudy

99% cloud

Good model window in the next 72 hours

Next good model window: Mon 09:00–18:00 (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 09:00 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 10:00.

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

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

Thu 08:00 – Sun 08:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.73 around Thu 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 0.1m to 0.18m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.93 to 3.89m/s).

Tides range from -0.48m to 1.56m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
Good 🌟 Good
Good 🌟 Good
Excellent ✅ Excellent
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
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
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
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
Fair ⚠️ Fair
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
Thu 08:00 0.18 · good 1.85 · good 30.30 · good Good
Thu 09:00 0.16 · good 2.45 · good 30.30 · good Good
Thu 10:00 0.16 · good 3.19 · good 30.30 · good Excellent
Thu 11:00 0.16 · good 3.34 · good 30.30 · good Good
Thu 12:00 0.16 · good 3.40 · good 30.40 · good Good
Thu 13:00 0.16 · good 3.31 · good 30.40 · good Good
Thu 14:00 0.16 · good 3.24 · good 30.40 · good Good
Thu 15:00 0.18 · good 2.94 · good 30.40 · good Good
Thu 16:00 0.18 · good 2.84 · good 30.40 · good Good
Thu 17:00 0.18 · good 2.21 · good 30.40 · good Good
Thu 18:00 0.14 · good 0.93 · good 30.40 · good Good
Thu 19:00 0.14 · good 2.48 · good 30.10 · good Poor
Thu 20:00 0.14 · good 2.09 · good 30.10 · good Poor
Thu 21:00 0.12 · good 2.47 · good 30.00 · good Poor
Thu 22:00 0.12 · good 2.48 · good 30.00 · good Poor
Thu 23:00 0.12 · good 2.14 · good 30.00 · good Poor
Fri 00:00 0.10 · good 2.06 · good 30.00 · good Poor
Fri 01:00 0.10 · good 2.47 · good 30.00 · good Poor
Fri 02:00 0.10 · good 2.59 · good 30.00 · good Poor
Fri 03:00 0.10 · good 3.89 · good 29.90 · good Poor
Fri 04:00 0.10 · good 2.06 · good 29.90 · good Poor
Fri 05:00 0.10 · good 2.29 · good 29.90 · good Poor
Fri 06:00 0.10 · good 2.64 · good 29.90 · good Poor
Fri 07:00 0.14 · good 1.65 · good 29.90 · good Good
Fri 08:00 0.14 · good 1.77 · good 30.00 · good Good
Fri 09:00 0.12 · good 2.57 · good 30.00 · good Good
Fri 10:00 0.12 · good 3.11 · good 30.10 · good Good
Fri 11:00 0.12 · good 2.92 · good 30.10 · good Good
Fri 12:00 0.12 · good 2.85 · good 30.10 · good Good
Fri 13:00 0.12 · good 4.12 · good 30.20 · good Good
Fri 14:00 0.14 · good 5.16 · good 30.20 · good Good
Fri 15:00 0.18 · good 4.38 · good 30.20 · good Good
Fri 16:00 0.20 · good 4.10 · good 30.20 · good Good
Fri 17:00 0.20 · good 3.65 · good 30.20 · good Good
Fri 18:00 0.22 · good 3.70 · good 30.10 · good Good
Fri 19:00 0.22 · good 3.44 · good 30.10 · good Poor
Fri 20:00 0.24 · good 3.45 · good 30.10 · good Poor
Fri 21:00 0.30 · good 2.44 · good 30.00 · good Poor
Fri 22:00 0.32 · good 4.34 · good 30.00 · good Poor
Fri 23:00 0.30 · good 3.52 · good 30.00 · good Poor
Sat 00:00 0.30 · good 3.06 · good 30.00 · good Poor
Sat 01:00 0.28 · good 1.77 · good 30.00 · good Poor
Sat 02:00 0.26 · good 2.33 · good 30.00 · good Poor
Sat 03:00 0.26 · good 3.82 · good 29.90 · good Poor
Sat 04:00 0.24 · good 3.66 · good 29.90 · good Poor
Sat 05:00 0.24 · good 2.21 · good 29.90 · good Poor
Sat 06:00 0.24 · good 2.20 · good 29.90 · good Poor
Sat 07:00 0.24 · good 3.92 · good 29.90 · good Good
Sat 08:00 0.26 · good 3.43 · good 29.90 · good Good
Sat 09:00 0.30 · good 3.10 · good 29.90 · good Good
Sat 10:00 0.32 · good 3.20 · good 30.00 · good Good
Sat 11:00 0.34 · good 4.49 · good 30.00 · good Good
Sat 12:00 0.34 · good 3.94 · good 30.10 · good Fair
Sat 13:00 0.36 · good 5.05 · good 30.10 · good Fair
Sat 14:00 0.38 · high 4.42 · good 30.10 · good Fair
Sat 15:00 0.40 · high 3.47 · good 30.10 · good Fair
Sat 16:00 0.42 · high 4.22 · good 30.10 · good Fair
Sat 17:00 0.42 · high 4.26 · good 30.10 · good Fair
Sat 18:00 0.34 · good 3.86 · good 29.90 · good Fair
Sat 19:00 0.34 · good 3.46 · good 29.90 · good Poor
Sat 20:00 0.36 · good 4.05 · good 29.90 · good Poor
Sat 21:00 0.34 · good 4.01 · good 29.80 · good Poor
Sat 22:00 0.32 · good 1.82 · good 29.80 · good Poor
Sat 23:00 0.34 · good 2.26 · good 29.80 · good Poor
Sun 00:00 0.36 · good 2.43 · good 29.80 · good Poor
Sun 01:00 0.38 · high 3.83 · good 29.80 · good Poor
Sun 02:00 0.40 · high 3.95 · good 29.80 · good Poor
Sun 03:00 0.40 · high 2.85 · good 29.70 · good Poor
Sun 04:00 0.42 · high 2.73 · good 29.70 · good Poor
Sun 05:00 0.44 · high 3.75 · good 29.70 · good Poor
Sun 06:00 0.44 · high 3.42 · good 29.70 · good Poor
Sun 07:00 0.46 · high 3.95 · good 29.70 · good Fair