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

No forecast for later today Data updated Sun 21:38 (+07)

No remaining forecast hours are available for today in Railay. Check the three-day outlook.

Right now (forecast)

Poor · 0.0/10

Sun 23:00 (+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: No score

Best time: -

Main risk: Changing Conditions

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

29.2°C

Sky

Partly cloudy

31% cloud

Good model window in the next 72 hours

Next good model window: Mon 07:00–18:00 (52% 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 (69 hours)
Darkness (33 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 23:00 – Mon 23:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.79 around Sat 09:00; 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 0.08m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.05 to 2.95m/s).

Tides range from -0.24m to 1.28m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview

Fri 23:00 Poor ❌ Limited

Sat 00:00 Poor ❌ Limited

Sat 01:00 Poor ❌ Limited

Sat 02:00 Poor ❌ Limited

Sat 03:00 Poor ❌ Limited

Sat 04:00 Poor ❌ Limited

Sat 05:00 Poor ❌ Limited

Sat 06:00 Poor ❌ Limited

Sat 07:00 Excellent ✅ Excellent

Sat 08:00 Excellent ✅ Excellent

Sat 09:00 Excellent ✅ Excellent

Sat 10:00 Excellent ✅ Excellent

Sat 11:00 Excellent ✅ Excellent

Sat 12:00 Excellent ✅ Excellent

Sat 13:00 Good 🌟 Good

Sat 14:00 Excellent ✅ Excellent

Sat 15:00 Excellent ✅ Excellent

Sat 16:00 Good 🌟 Good

Sat 17:00 Good 🌟 Good

Sat 18:00 Good 🌟 Good

Sat 19:00 Poor ❌ Limited

Sat 20:00 Poor ❌ Limited

Sat 21:00 Poor ❌ Limited

Sat 22:00 Poor ❌ Limited

Sat 23:00 Poor ❌ Limited

Sun 00:00 Poor ❌ Limited

Sun 01:00 Poor ❌ Limited

Sun 02:00 Poor ❌ Limited

Sun 03:00 Poor ❌ Limited

Sun 04:00 Poor ❌ Limited

Sun 05:00 Poor ❌ Limited

Sun 06:00 Poor ❌ Limited

Sun 07:00 Excellent ✅ Excellent

Sun 08:00 Excellent ✅ Excellent

Sun 09:00 Excellent ✅ Excellent

Sun 10:00 Good 🌟 Good

Sun 11:00 Good 🌟 Good

Sun 12:00 Excellent ✅ Excellent

Sun 13:00 Excellent ✅ Excellent

Sun 14:00 Good 🌟 Good

Sun 15:00 Good 🌟 Good

Sun 16:00 Good 🌟 Good

Sun 17:00 Good 🌟 Good

Sun 18:00 Good 🌟 Good

Sun 19:00 Poor ❌ Limited

Sun 20:00 Poor ❌ Limited

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

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 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
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