What is the best time of day to snorkel in Railay?

Snorkel in daylight, if possible in the morning before the wind picks up. Currents are often weaker near high slack tide. SnorkelForecast scores each daylight hour for Railay.

What is the best tide for snorkeling?

High slack tide, within about an hour of the high-tide peak, often has weaker currents. Strong low tides and tidal flow near channels or headlands reduce the score.

MARINE REPORT / 72 HOURS

Railay Snorkel Report Today

Thailand · Updated Sun 21:38 (+07) · Source: Snapshot

The skinny

Poor Data updated Sun 21:38 (+07)

Railay has no good model window later today. Check the three-day outlook and official beach advisories.

Right now (forecast)

Poor · 0.0/10

Sun 21:00 (+07)

Later today

No fresh data for this period.

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: 0.0/10

Best time: -

Main risk: Sea Temperature

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:11

Sunset

18:07

Water

31.5°C

Max air

25.9°C

Sky

Clear

13% 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

Sunday

❌ Poor 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 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

Sun 21:00 – Wed 21:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.8 around Mon 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 0.08m to 0.22m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.45 to 3.8m/s).

Tides range from -0.09m to 0.99m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview

Sun 21:00 Poor ❌ Limited

Sun 22:00 Poor ❌ Limited

Sun 23:00 Poor ❌ Limited

Mon 00:00 Poor ❌ Limited

Mon 01:00 Poor ❌ Limited

Mon 02:00 Poor ❌ Limited

Mon 03:00 Poor ❌ Limited

Mon 04:00 Poor ❌ Limited

Mon 05:00 Poor ❌ Limited

Mon 06:00 Poor ❌ Limited

Mon 07:00 Excellent ✅ Excellent

Mon 08:00 Excellent ✅ Excellent

Mon 09:00 Excellent ✅ Excellent

Mon 10:00 Excellent ✅ Excellent

Mon 11:00 Good 🌟 Good

Mon 12:00 Good 🌟 Good

Mon 13:00 Excellent ✅ Excellent

Mon 14:00 Good 🌟 Good

Mon 15:00 Good 🌟 Good

Mon 16:00 Good 🌟 Good

Mon 17:00 Good 🌟 Good

Mon 18:00 Good 🌟 Good

Mon 19:00 Poor ❌ Limited

Mon 20:00 Poor ❌ Limited

Mon 21:00 Poor ❌ Limited

Mon 22:00 Poor ❌ Limited

Mon 23:00 Poor ❌ Limited

Tue 00:00 Poor ❌ Limited

Tue 01:00 Poor ❌ Limited

Tue 02:00 Poor ❌ Limited

Tue 03:00 Poor ❌ Limited

Tue 04:00 Poor ❌ Limited

Tue 05:00 Poor ❌ Limited

Tue 06:00 Poor ❌ Limited

Tue 07:00 Excellent ✅ Excellent

Tue 08:00 Excellent ✅ Excellent

Tue 09:00 Excellent ✅ Excellent

Tue 10:00 Excellent ✅ Excellent

Tue 11:00 Excellent ✅ Excellent

Tue 12:00 Excellent ✅ Excellent

Tue 13:00 Excellent ✅ Excellent

Tue 14:00 Excellent ✅ Excellent

Tue 15:00 Excellent ✅ Excellent

Tue 16:00 Excellent ✅ Excellent

Tue 17:00 Excellent ✅ Excellent

Tue 18:00 Excellent ✅ Excellent

Tue 19:00 Poor ❌ Limited

Tue 20:00 Poor ❌ Limited

Tue 21:00 Poor ❌ Limited

Tue 22:00 Poor ❌ Limited

Tue 23:00 Poor ❌ Limited

Wed 00:00 Poor ❌ Limited

Wed 01:00 Poor ❌ Limited

Wed 02:00 Poor ❌ Limited

Wed 03:00 Poor ❌ Limited

Wed 04:00 Poor ❌ Limited

Wed 05:00 Poor ❌ Limited

Wed 06:00 Poor ❌ Limited

Wed 07:00 Excellent ✅ Excellent

Wed 08:00 Excellent ✅ Excellent

Wed 09:00 Excellent ✅ Excellent

Wed 10:00 Excellent ✅ Excellent

Wed 11:00 Excellent ✅ Excellent

Wed 12:00 Good 🌟 Good

Wed 13:00 Good 🌟 Good

Wed 14:00 Good 🌟 Good

Wed 15:00 Good 🌟 Good

Wed 16:00 Good 🌟 Good

Wed 17:00 Excellent ✅ Excellent

Wed 18:00 Excellent ✅ Excellent

Wed 19:00 Poor ❌ Limited

Wed 20:00 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 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
Mon 00:00	0.18 · good	1.59 · good	31.00 · out of range	Poor
Mon 01:00	0.14 · good	2.23 · good	31.00 · out of range	Poor
Mon 02:00	0.14 · good	2.37 · good	31.00 · out of range	Poor
Mon 03:00	0.12 · good	2.51 · good	31.00 · out of range	Poor
Mon 04:00	0.12 · good	1.87 · good	30.90 · out of range	Poor
Mon 05:00	0.12 · good	0.64 · good	30.90 · out of range	Poor
Mon 06:00	0.10 · good	1.30 · good	30.90 · out of range	Poor
Mon 07:00	0.10 · good	0.45 · good	30.90 · out of range	Excellent
Mon 08:00	0.10 · good	1.42 · good	31.00 · out of range	Excellent
Mon 09:00	0.10 · good	2.67 · good	31.00 · out of range	Excellent
Mon 10:00	0.10 · good	1.71 · good	31.10 · out of range	Excellent
Mon 11:00	0.10 · good	3.47 · good	31.20 · out of range	Good
Mon 12:00	0.08 · good	3.16 · good	31.30 · out of range	Good
Mon 13:00	0.08 · good	3.04 · good	31.30 · out of range	Excellent
Mon 14:00	0.10 · good	2.92 · good	31.30 · out of range	Good
Mon 15:00	0.10 · good	3.53 · good	31.30 · out of range	Good
Mon 16:00	0.12 · good	2.96 · good	31.30 · out of range	Good
Mon 17:00	0.14 · good	3.80 · good	31.30 · out of range	Good
Mon 18:00	0.18 · good	3.34 · good	31.20 · out of range	Good
Mon 19:00	0.22 · good	1.50 · good	30.90 · out of range	Poor
Mon 20:00	0.22 · good	1.23 · good	30.90 · out of range	Poor
Mon 21:00	0.20 · good	1.05 · good	30.90 · out of range	Poor
Mon 22:00	0.20 · good	0.56 · good	30.90 · out of range	Poor
Mon 23:00	0.18 · good	2.03 · good	30.90 · out of range	Poor
Tue 00:00	0.16 · good	0.99 · good	30.80 · out of range	Poor
Tue 01:00	0.08 · good	0.64 · good	30.80 · out of range	Poor
Tue 02:00	0.08 · good	0.64 · good	30.80 · out of range	Poor
Tue 03:00	0.08 · good	0.81 · good	30.80 · out of range	Poor
Tue 04:00	0.08 · good	0.10 · good	30.80 · out of range	Poor
Tue 05:00	0.08 · good	1.03 · good	30.70 · out of range	Poor
Tue 06:00	0.08 · good	0.63 · good	30.70 · out of range	Poor
Tue 07:00	0.08 · good	0.86 · good	30.70 · out of range	Excellent
Tue 08:00	0.08 · good	0.52 · good	30.80 · out of range	Excellent
Tue 09:00	0.06 · good	0.18 · good	30.80 · out of range	Excellent
Tue 10:00	0.06 · good	0.97 · good	30.90 · out of range	Excellent
Tue 11:00	0.06 · good	1.98 · good	30.90 · out of range	Excellent
Tue 12:00	0.04 · good	2.69 · good	31.00 · out of range	Excellent
Tue 13:00	0.04 · good	2.77 · good	31.00 · out of range	Excellent
Tue 14:00	0.04 · good	2.93 · good	31.00 · out of range	Excellent
Tue 15:00	0.04 · good	1.98 · good	31.00 · out of range	Excellent
Tue 16:00	0.04 · good	2.01 · good	31.00 · out of range	Excellent
Tue 17:00	0.06 · good	1.42 · good	31.00 · out of range	Excellent
Tue 18:00	0.04 · good	1.81 · good	31.00 · out of range	Excellent
Tue 19:00	0.04 · good	1.30 · good	31.00 · out of range	Poor
Tue 20:00	0.04 · good	1.55 · good	31.00 · out of range	Poor
Tue 21:00	0.04 · good	1.10 · good	30.90 · out of range	Poor
Tue 22:00	0.04 · good	2.42 · good	30.90 · out of range	Poor
Tue 23:00	0.04 · good	2.62 · good	30.90 · out of range	Poor
Wed 00:00	0.06 · good	2.31 · good	30.90 · out of range	Poor
Wed 01:00	0.06 · good	3.76 · good	30.90 · out of range	Poor
Wed 02:00	0.06 · good	0.53 · good	30.90 · out of range	Poor
Wed 03:00	0.08 · good	1.31 · good	30.80 · out of range	Poor
Wed 04:00	0.08 · good	0.98 · good	30.80 · out of range	Poor
Wed 05:00	0.10 · good	1.94 · good	30.80 · out of range	Poor
Wed 06:00	0.10 · good	1.70 · good	30.80 · out of range	Poor
Wed 07:00	0.12 · good	1.47 · good	30.80 · out of range	Excellent
Wed 08:00	0.12 · good	1.19 · good	30.80 · out of range	Excellent
Wed 09:00	0.12 · good	0.96 · good	30.80 · out of range	Excellent
Wed 10:00	0.12 · good	0.68 · good	30.80 · out of range	Excellent
Wed 11:00	0.12 · good	1.71 · good	30.80 · out of range	Excellent
Wed 12:00	0.10 · good	2.04 · good	30.90 · out of range	Good
Wed 13:00	0.10 · good	2.64 · good	30.90 · out of range	Good
Wed 14:00	0.10 · good	4.07 · good	30.90 · out of range	Good
Wed 15:00	0.10 · good	3.04 · good	30.90 · out of range	Good
Wed 16:00	0.10 · good	2.33 · good	30.90 · out of range	Good
Wed 17:00	0.10 · good	2.02 · good	30.90 · out of range	Excellent
Wed 18:00	0.10 · good	1.30 · good	30.80 · out of range	Excellent
Wed 19:00	0.10 · good	1.34 · good	30.80 · out of range	Poor
Wed 20:00	0.10 · good	1.36 · good	30.80 · out of range	Poor