MARINE REPORT / 72 HOURS

Similan Islands Snorkel Report Today

Thailand · Updated Sun 21:59 (+07) · Source: Snapshot

The skinny

Poor Data updated Sun 21:59 (+07)

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

Right now (forecast)

Poor · 0.0/10

Sun 22:00 (+07)

Later today

No fresh data for this period.

Next three days

Fair · 5.4/10

Wed 14:00 (+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: Waves

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:17

Sunset

18:15

Water

29.8°C

Max air

26.2°C

Sky

Cloudy

100% cloud

No good model window in the next 72 hours

Use the best-available section for the least-bad times.

3-day planner Best available Show data

3-day planner

Sunday

❌ Poor conditions

Main blocker: Waves

Monday

⚠️ Fair conditions

Main blocker: Waves

Tuesday

⚠️ Fair conditions

Main blocker: Waves

Best available hours

  • Wed 14:00: Fair (0.54) · still limited by waves, tide/current
  • Wed 09:00: Fair (0.54) · still limited by waves, tide/current
  • Mon 15:00: Fair (0.53) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

  • Waves (70 hours)
  • Tide/current (59 hours)
  • Darkness (34 hours)

Jellyfish drift risk

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

Low · 34/100

Low peak drift risk around Mon 05:00.

warm water supports seasonal jellyfish activity; surface drift/current is noticeable; 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

Mon 10:00, Mon 23:00, Tue 11:00, Tue 23:00, Wed 11:00

Nearby alternatives in Thailand

Surin Islands

89 km away

✅ Good

Railay

149 km away

✅ Good

Koh Phi Phi

161 km away

✅ Good

Koh Kradan

234 km away

✅ Good

Advanced forecast data

Viewing current forecast

Sun 22:00 – Wed 22:00 (+07)

Previous day Yesterday

Snorkel Score (next 24h)

Best snorkel score is 0.53 around Mon 15:00; 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.

0/24 sampled hours stay at or below 0.36m (range 0.44m to 0.58m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.75 to 3.78m/s).

Tides range from -0.52m to 1.55m; 1 of 24 hours are in or near peak slack windows.

72-hour forecast overview
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
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
Sun 23:00 0.44 · high 3.61 · good 29.80 · good Poor
Mon 00:00 0.44 · high 3.06 · good 29.80 · good Poor
Mon 01:00 0.46 · high 1.13 · good 29.80 · good Poor
Mon 02:00 0.46 · high 3.02 · good 29.80 · good Poor
Mon 03:00 0.48 · high 2.48 · good 29.80 · good Poor
Mon 04:00 0.48 · high 3.11 · good 29.70 · good Poor
Mon 05:00 0.50 · high 2.86 · good 29.70 · good Poor
Mon 06:00 0.50 · high 3.04 · good 29.70 · good Poor
Mon 07:00 0.52 · high 2.54 · good 29.70 · good Fair
Mon 08:00 0.52 · high 3.00 · good 29.80 · good Fair
Mon 09:00 0.52 · high 2.55 · good 29.90 · good Fair
Mon 10:00 0.52 · high 2.87 · good 30.00 · good Fair
Mon 11:00 0.54 · high 3.52 · good 30.00 · good Fair
Mon 12:00 0.54 · high 2.83 · good 30.10 · good Fair
Mon 13:00 0.56 · high 2.77 · good 30.20 · good Fair
Mon 14:00 0.56 · high 2.26 · good 30.20 · good Fair
Mon 15:00 0.58 · high 1.65 · good 30.20 · good Fair
Mon 16:00 0.58 · high 2.87 · good 30.10 · good Fair
Mon 17:00 0.58 · high 3.78 · good 30.10 · good Fair
Mon 18:00 0.58 · high 2.01 · good 30.10 · good Fair
Mon 19:00 0.58 · high 0.75 · good 30.00 · good Poor
Mon 20:00 0.58 · high 2.80 · good 30.00 · good Poor
Mon 21:00 0.58 · high 2.82 · good 30.00 · good Poor
Mon 22:00 0.58 · high 3.07 · good 29.90 · good Poor
Mon 23:00 0.58 · high 2.40 · good 29.90 · good Poor
Tue 00:00 0.56 · high 3.83 · good 29.90 · good Poor
Tue 01:00 0.56 · high 4.08 · good 29.90 · good Poor
Tue 02:00 0.56 · high 3.69 · good 29.80 · good Poor
Tue 03:00 0.56 · high 3.16 · good 29.80 · good Poor
Tue 04:00 0.56 · high 3.15 · good 29.80 · good Poor
Tue 05:00 0.56 · high 2.19 · good 29.80 · good Poor
Tue 06:00 0.56 · high 3.06 · good 29.80 · good Poor
Tue 07:00 0.56 · high 2.57 · good 29.80 · good Fair
Tue 08:00 0.56 · high 2.83 · good 29.80 · good Fair
Tue 09:00 0.56 · high 3.04 · good 29.90 · good Fair
Tue 10:00 0.56 · high 2.67 · good 30.00 · good Fair
Tue 11:00 0.56 · high 2.45 · good 30.10 · good Fair
Tue 12:00 0.56 · high 1.81 · good 30.20 · good Fair
Tue 13:00 0.56 · high 0.85 · good 30.30 · good Fair
Tue 14:00 0.56 · high 1.28 · good 30.30 · good Fair
Tue 15:00 0.54 · high 1.27 · good 30.30 · good Fair
Tue 16:00 0.54 · high 1.59 · good 30.20 · good Fair
Tue 17:00 0.54 · high 2.16 · good 30.20 · good Fair
Tue 18:00 0.52 · high 2.39 · good 30.20 · good Fair
Tue 19:00 0.52 · high 2.97 · good 30.10 · good Poor
Tue 20:00 0.52 · high 2.87 · good 30.10 · good Poor
Tue 21:00 0.52 · high 3.10 · good 30.10 · good Poor
Tue 22:00 0.52 · high 3.23 · good 30.00 · good Poor
Tue 23:00 0.52 · high 3.49 · good 30.00 · good Poor
Wed 00:00 0.52 · high 1.44 · good 30.00 · good Poor
Wed 01:00 0.52 · high 1.15 · good 29.90 · good Poor
Wed 02:00 0.52 · high 4.52 · good 29.90 · good Poor
Wed 03:00 0.52 · high 4.30 · good 29.80 · good Poor
Wed 04:00 0.52 · high 2.16 · good 29.80 · good Poor
Wed 05:00 0.52 · high 3.88 · good 29.80 · good Poor
Wed 06:00 0.52 · high 2.02 · good 29.80 · good Poor
Wed 07:00 0.52 · high 2.68 · good 29.80 · good Fair
Wed 08:00 0.52 · high 3.36 · good 29.80 · good Fair
Wed 09:00 0.50 · high 3.65 · good 29.90 · good Fair
Wed 10:00 0.50 · high 4.57 · good 30.00 · good Fair
Wed 11:00 0.50 · high 4.09 · good 30.20 · good Fair
Wed 12:00 0.48 · high 3.60 · good 30.30 · good Fair
Wed 13:00 0.48 · high 3.04 · good 30.30 · good Fair
Wed 14:00 0.48 · high 2.38 · good 30.30 · good Fair
Wed 15:00 0.48 · high 2.44 · good 30.30 · good Fair
Wed 16:00 0.48 · high 3.03 · good 30.30 · good Fair
Wed 17:00 0.48 · high 3.40 · good 30.30 · good Fair
Wed 18:00 0.48 · high 3.55 · good 30.30 · good Fair
Wed 19:00 0.48 · high 4.26 · good 30.20 · good Poor
Wed 20:00 0.48 · high 3.36 · good 30.20 · good Poor