SnorkelForecast.com

Similan Islands Snorkel Report Today

Thailand · Updated Tue 04:13 (+07) · Source: Snapshot · Showing fallback/stale data

The skinny

Marginal Report Wed 19:04

Similan Islands looks marginal today. The least-bad daylight window is around Thu 07:00, but waves is limiting the forecast.

Score: 3.8/10

Best time: Thu 07:00

Main risk: Waves

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:19

Sunset

18:52

Water

29.7°C

Max air

28.4°C

Sky

Cloudy

84% cloud

No safe 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

Wednesday

❌ poor conditions

Main blocker: Waves

Thursday

⚠️ fair conditions

Main blocker: Waves

Friday

❌ poor conditions

Main blocker: Waves

Best available hours

  • Thu 00:00 — Fair (0.38) · still limited by waves, tide/current
  • Thu 04:00 — Poor (0.33) · still limited by waves, tide/current
  • Thu 05:00 — Poor (0.32) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

  • Waves (39 hours)
  • Tide/current (39 hours)
  • Wind (24 hours)

Jellyfish drift risk

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

Low · 34/100

Low drift risk now.

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

Next early morning high tide: Wed 21:00

Wed 21:00, Thu 09:00, Thu 22:00

Nearby alternatives in Thailand

Surin Islands

89 km away

❌ Poor

Railay

149 km away

✅ Good

Koh Phi Phi

161 km away

✅ Good

Koh Kradan

234 km away

✅ Good

Advanced forecast data

Viewing historical data

Sat 12:00 – Tue 12:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.29 around Sun 18:00; 0 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 1.38m to 1.54m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 15.8 to 27.1m/s).

Tides range from -0.14m to 1.43m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
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
poor ❌ Limited
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
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
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 and safety gate (outside daylight scores lower).
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Sat 12:00 1.54 · high 24.70 · high 29.40 · good poor
Sat 13:00 1.52 · high 23.70 · high 29.40 · good poor
Sat 14:00 1.50 · high 23.20 · high 29.30 · good poor
Sat 15:00 1.48 · high 22.90 · high 29.30 · good poor
Sat 16:00 1.48 · high 23.10 · high 29.30 · good poor
Sat 17:00 1.46 · high 19.90 · high 29.30 · good poor
Sat 18:00 1.46 · high 18.10 · high 29.30 · good poor
Sat 19:00 1.46 · high 19.90 · high 29.30 · good poor
Sat 20:00 1.48 · high 19.40 · high 29.30 · good poor
Sat 21:00 1.48 · high 20.30 · high 29.30 · good poor
Sat 22:00 1.48 · high 21.30 · high 29.30 · good poor
Sat 23:00 1.48 · high 20.60 · high 29.30 · good poor
Sun 00:00 1.48 · high 21.00 · high 29.30 · good poor
Sun 01:00 1.48 · high 23.90 · high 29.30 · good poor
Sun 02:00 1.50 · high 27.10 · high 29.30 · good poor
Sun 03:00 1.50 · high 23.10 · high 29.40 · good poor
Sun 04:00 1.48 · high 22.50 · high 29.40 · good poor
Sun 05:00 1.48 · high 21.70 · high 29.40 · good poor
Sun 06:00 1.46 · high 23.00 · high 29.40 · good poor
Sun 07:00 1.44 · high 20.30 · high 29.40 · good poor
Sun 08:00 1.44 · high 19.00 · high 29.40 · good poor
Sun 09:00 1.42 · high 18.20 · high 29.40 · good poor
Sun 10:00 1.40 · high 15.80 · high 29.40 · good poor
Sun 11:00 1.38 · high 17.10 · high 29.40 · good poor
Sun 12:00 1.36 · high 17.60 · high 29.40 · good poor
Sun 13:00 1.34 · high 18.60 · high 29.40 · good poor
Sun 14:00 1.34 · high 19.90 · high 29.40 · good poor
Sun 15:00 1.32 · high 19.00 · high 29.40 · good poor
Sun 16:00 1.32 · high 20.60 · high 29.30 · good poor
Sun 17:00 1.30 · high 20.90 · high 29.30 · good poor
Sun 18:00 1.30 · high 20.80 · high 29.30 · good poor
Sun 19:00 1.28 · high 21.90 · high 29.30 · good poor
Sun 20:00 1.28 · high 23.50 · high 29.30 · good poor
Sun 21:00 1.26 · high 25.00 · high 29.30 · good poor
Sun 22:00 1.26 · high 25.00 · high 29.30 · good poor
Sun 23:00 1.24 · high 23.90 · high 29.30 · good poor
Mon 00:00 1.24 · high 24.60 · high 29.30 · good poor
Mon 01:00 1.24 · high 24.30 · high 29.30 · good poor
Mon 02:00 1.24 · high 21.40 · high 29.40 · good poor
Mon 03:00 1.24 · high 18.80 · high 29.40 · good poor
Mon 04:00 1.24 · high 17.30 · high 29.50 · good poor
Mon 05:00 1.24 · high 15.80 · high 29.50 · good poor
Mon 06:00 1.24 · high 10.60 · high 29.60 · good poor
Mon 07:00 1.24 · high 9.10 · high 29.60 · good fair
Mon 08:00 1.22 · high 6.90 · high 29.60 · good fair
Mon 09:00 1.22 · high 9.20 · high 29.60 · good poor
Mon 10:00 1.04 · high 4.54 · good 29.50 · good fair
Mon 11:00 1.04 · high 4.15 · good 29.50 · good fair
Mon 12:00 1.04 · high 4.34 · good 29.50 · good poor
Mon 13:00 1.04 · high 4.55 · good 29.50 · good poor
Mon 14:00 1.04 · high 5.24 · good 29.50 · good poor
Mon 15:00 1.04 · high 5.31 · good 29.50 · good poor
Mon 16:00 1.06 · high 5.32 · good 29.50 · good poor
Mon 17:00 1.06 · high 5.60 · high 29.40 · good poor
Mon 18:00 1.08 · high 5.44 · high 29.40 · good poor
Mon 19:00 1.10 · high 5.73 · high 29.40 · good poor
Mon 20:00 1.12 · high 6.12 · high 29.40 · good poor
Mon 21:00 1.14 · high 6.30 · high 29.40 · good poor
Mon 22:00 1.14 · high 6.53 · high 29.30 · good poor
Mon 23:00 1.14 · high 6.45 · high 29.30 · good poor
Tue 00:00 1.14 · high 6.36 · high 29.30 · good poor
Tue 01:00 1.14 · high 6.17 · high 29.30 · good poor
Tue 02:00 1.16 · high 5.80 · high 29.40 · good poor
Tue 03:00 1.16 · high 5.91 · high 29.40 · good poor
Tue 04:00 1.18 · high 6.48 · high 29.40 · good poor
Tue 05:00 1.22 · high 6.56 · high 29.50 · good poor
Tue 06:00 1.24 · high 6.46 · high 29.50 · good poor
Tue 07:00 1.26 · high 6.51 · high 29.50 · good poor
Tue 08:00 1.28 · high 7.18 · high 29.50 · good poor
Tue 09:00 1.30 · high 7.31 · high 29.50 · good poor
Tue 10:00 1.32 · high 7.45 · high 29.50 · good poor
Tue 11:00 1.32 · high 7.17 · high 29.50 · good poor