MARINE REPORT / 72 HOURS

Railay Snorkel Report Today

Thailand · Updated Mon 04:00 (+07) · Source: Snapshot

The skinny

Go in the best window Data updated Mon 04:00 (+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 04:00 (+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 07:00

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

97% 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 drift risk now.

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

Mon 04:00 – Thu 04:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.65 around Mon 18:00; 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.

13/24 sampled hours stay at or below 0.36m (range 0.2m to 0.5m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.2 to 3.96m/s).

Tides range from -0.87m to 2.03m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Good 🌟 Good
Fair ⚠️ Fair
Fair ⚠️ Fair
Good 🌟 Good
Fair ⚠️ Fair
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
Good 🌟 Good
Excellent ✅ Excellent
Good 🌟 Good
Excellent ✅ Excellent
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
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
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
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
Mon 04:00 0.50 · high 3.89 · good 29.60 · good Poor
Mon 05:00 0.50 · high 2.61 · good 29.60 · good Poor
Mon 06:00 0.50 · high 3.68 · good 29.60 · good Poor
Mon 07:00 0.50 · high 3.79 · good 29.60 · good Fair
Mon 08:00 0.48 · high 2.39 · good 29.60 · good Fair
Mon 09:00 0.44 · high 3.71 · good 29.60 · good Fair
Mon 10:00 0.42 · high 2.70 · good 29.70 · good Fair
Mon 11:00 0.40 · high 3.91 · good 29.70 · good Fair
Mon 12:00 0.36 · good 3.96 · good 29.70 · good Good
Mon 13:00 0.34 · good 3.38 · good 29.80 · good Fair
Mon 14:00 0.36 · good 3.18 · good 29.80 · good Fair
Mon 15:00 0.38 · high 3.15 · good 29.80 · good Good
Mon 16:00 0.40 · high 2.96 · good 29.80 · good Fair
Mon 17:00 0.38 · high 2.97 · good 29.80 · good Good
Mon 18:00 0.28 · good 1.95 · good 29.80 · good Good
Mon 19:00 0.26 · good 1.49 · good 29.80 · good Poor
Mon 20:00 0.24 · good 1.07 · good 29.80 · good Poor
Mon 21:00 0.24 · good 0.68 · good 29.80 · good Poor
Mon 22:00 0.22 · good 0.94 · good 29.80 · good Poor
Mon 23:00 0.22 · good 0.20 · good 29.80 · good Poor
Tue 00:00 0.20 · good 1.66 · good 29.80 · good Poor
Tue 01:00 0.20 · good 1.23 · good 29.80 · good Poor
Tue 02:00 0.20 · good 0.75 · good 29.80 · good Poor
Tue 03:00 0.20 · good 3.54 · good 29.70 · good Poor
Tue 04:00 0.20 · good 2.42 · good 29.70 · good Poor
Tue 05:00 0.20 · good 1.86 · good 29.70 · good Poor
Tue 06:00 0.18 · good 1.54 · good 29.70 · good Poor
Tue 07:00 0.18 · good 1.25 · good 29.70 · good Good
Tue 08:00 0.18 · good 1.39 · good 29.70 · good Excellent
Tue 09:00 0.18 · good 0.47 · good 29.80 · good Good
Tue 10:00 0.18 · good 1.69 · good 29.90 · good Excellent
Tue 11:00 0.18 · good 1.66 · good 30.00 · good Good
Tue 12:00 0.16 · good 1.97 · good 30.00 · good Excellent
Tue 13:00 0.16 · good 2.44 · good 30.10 · good Good
Tue 14:00 0.16 · good 3.21 · good 30.10 · good Good
Tue 15:00 0.16 · good 3.86 · good 30.10 · good Good
Tue 16:00 0.16 · good 2.70 · good 30.10 · good Good
Tue 17:00 0.16 · good 1.21 · good 30.00 · good Good
Tue 18:00 0.16 · good 0.25 · good 30.00 · good Good
Tue 19:00 0.18 · good 1.17 · good 30.10 · good Poor
Tue 20:00 0.18 · good 1.75 · good 30.10 · good Poor
Tue 21:00 0.18 · good 0.85 · good 30.10 · good Poor
Tue 22:00 0.18 · good 1.12 · good 30.10 · good Poor
Tue 23:00 0.18 · good 1.30 · good 30.10 · good Poor
Wed 00:00 0.16 · good 1.18 · good 30.00 · good Poor
Wed 01:00 0.16 · good 1.45 · good 30.00 · good Poor
Wed 02:00 0.16 · good 0.85 · good 30.00 · good Poor
Wed 03:00 0.14 · good 1.26 · good 30.00 · good Poor
Wed 04:00 0.14 · good 1.74 · good 29.90 · good Poor
Wed 05:00 0.14 · good 1.42 · good 29.90 · good Poor
Wed 06:00 0.14 · good 1.19 · good 29.90 · good Poor
Wed 07:00 0.14 · good 1.70 · good 29.90 · good Good
Wed 08:00 0.14 · good 1.80 · good 30.00 · good Excellent
Wed 09:00 0.14 · good 1.74 · good 30.10 · good Excellent
Wed 10:00 0.14 · good 1.61 · good 30.10 · good Excellent
Wed 11:00 0.14 · good 1.68 · good 30.20 · good Excellent
Wed 12:00 0.12 · good 2.87 · good 30.30 · good Excellent
Wed 13:00 0.12 · good 0.25 · good 30.40 · good Excellent
Wed 14:00 0.12 · good 0.47 · good 30.40 · good Excellent
Wed 15:00 0.12 · good 1.99 · good 30.40 · good Good
Wed 16:00 0.12 · good 1.88 · good 30.40 · good Good
Wed 17:00 0.12 · good 2.13 · good 30.40 · good Good
Wed 18:00 0.10 · good 1.32 · good 30.60 · out of range Good
Wed 19:00 0.10 · good 0.35 · good 30.60 · out of range Poor
Wed 20:00 0.10 · good 0.49 · good 30.60 · out of range Poor
Wed 21:00 0.10 · good 0.81 · good 30.50 · out of range Poor
Wed 22:00 0.10 · good 2.38 · good 30.50 · out of range Poor
Wed 23:00 0.10 · good 2.20 · good 30.50 · out of range Poor
Thu 00:00 0.10 · good 2.45 · good 30.40 · good Poor
Thu 01:00 0.10 · good 2.07 · good 30.40 · good Poor
Thu 02:00 0.10 · good 1.25 · good 30.40 · good Poor
Thu 03:00 0.08 · good 1.00 · good 30.40 · good Poor