SnorkelForecast.com

Similan Islands Snorkel Report Today

Thailand · Updated Tue 20:30 (+07) · Source: Snapshot

The skinny

Marginal Report Wed 06:22

Similan Islands looks marginal today. The least-bad daylight window is around Wed 11:00, but waves is limiting the forecast.

Score: 4.2/10

Best time: Wed 11:00

Main risk: Waves

Best morning signal: Wed 11:00 (Fair).

Best afternoon signal: Wed 12:00 (Fair). Peak afternoon wind is about 7.4 m/s.

Email me when it is good

Sunrise

06:20

Sunset

18:37

Water

29.0°C

Max air

27.3°C

Sky

Cloudy

99% 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

Wednesday

⚠️ Fair conditions

Main blocker: Waves

Thursday

⚠️ Fair conditions

Main blocker: Waves

Friday

⚠️ Fair conditions

Main blocker: Waves

Best available hours

  • Wed 04:00: Fair (0.42) · still limited by waves, tide/current
  • Wed 05:00: Fair (0.38) · still limited by waves, wind
  • Fri 04:00: Fair (0.37) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

  • Waves (68 hours)
  • Tide/current (68 hours)
  • Wind (56 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 18:00

Wed 05:00, Wed 18:00, Thu 06:00, Thu 19:00, Fri 07:00

Nearby alternatives in Thailand

Surin Islands

89 km away

❌ Poor

Railay

149 km away

✅ Good

Koh Phi Phi

161 km away

⚠️ Fair

Koh Kradan

234 km away

✅ Good

Advanced forecast data

Viewing current forecast

Tue 23:00 – Fri 23:00 (+07)

Previous day Yesterday

Snorkel Score (next 24h)

Best snorkel score is 0.42 around Wed 11:00; 3 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 1.32m to 1.42m).

Wind is at or below 5.4m/s in 5/24 sampled hours (range 4.28 to 7.56m/s).

Tides range from -0.26m to 1.38m; 2 of 24 hours are in or near peak slack windows.

72-hour forecast overview
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
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
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
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
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
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 is better in daylight, so night hours score lower.
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Wed 00:00 1.42 · high 7.03 · high 29.00 · good Poor
Wed 01:00 1.42 · high 7.56 · high 29.00 · good Poor
Wed 02:00 1.42 · high 6.47 · high 29.10 · good Poor
Wed 03:00 1.42 · high 6.82 · high 29.10 · good Poor
Wed 04:00 1.42 · high 4.85 · good 29.10 · good Fair
Wed 05:00 1.42 · high 5.91 · high 29.20 · good Fair
Wed 06:00 1.42 · high 5.45 · high 29.20 · good Fair
Wed 07:00 1.42 · high 5.62 · high 29.20 · good Poor
Wed 08:00 1.40 · high 6.66 · high 29.20 · good Poor
Wed 09:00 1.40 · high 5.45 · high 29.20 · good Poor
Wed 10:00 1.40 · high 7.43 · high 29.20 · good Poor
Wed 11:00 1.38 · high 6.44 · high 29.10 · good Poor
Wed 12:00 1.38 · high 6.37 · high 29.10 · good Poor
Wed 13:00 1.38 · high 6.48 · high 29.10 · good Poor
Wed 14:00 1.36 · high 6.21 · high 29.10 · good Poor
Wed 15:00 1.36 · high 5.60 · high 29.10 · good Poor
Wed 16:00 1.36 · high 5.20 · good 29.10 · good Poor
Wed 17:00 1.38 · high 5.92 · high 29.00 · good Poor
Wed 18:00 1.38 · high 6.95 · high 29.00 · good Poor
Wed 19:00 1.36 · high 7.49 · high 29.00 · good Poor
Wed 20:00 1.36 · high 5.89 · high 29.00 · good Poor
Wed 21:00 1.34 · high 5.31 · good 29.00 · good Poor
Wed 22:00 1.32 · high 4.28 · good 29.00 · good Poor
Wed 23:00 1.32 · high 4.60 · good 29.00 · good Poor
Thu 00:00 1.30 · high 6.20 · high 29.00 · good Poor
Thu 01:00 1.30 · high 6.23 · high 29.00 · good Fair
Thu 02:00 1.30 · high 4.55 · good 29.10 · good Fair
Thu 03:00 1.30 · high 5.02 · good 29.10 · good Fair
Thu 04:00 1.28 · high 6.78 · high 29.10 · good Poor
Thu 05:00 1.24 · high 5.13 · good 29.10 · good Poor
Thu 06:00 1.22 · high 5.76 · high 29.10 · good Poor
Thu 07:00 1.22 · high 6.80 · high 29.10 · good Poor
Thu 08:00 1.24 · high 5.93 · high 29.10 · good Poor
Thu 09:00 1.24 · high 6.47 · high 29.10 · good Poor
Thu 10:00 1.24 · high 6.39 · high 29.10 · good Poor
Thu 11:00 1.26 · high 6.76 · high 29.10 · good Poor
Thu 12:00 1.26 · high 6.71 · high 29.10 · good Poor
Thu 13:00 1.26 · high 6.77 · high 29.10 · good Poor
Thu 14:00 1.26 · high 7.20 · high 29.00 · good Poor
Thu 15:00 1.26 · high 5.94 · high 29.00 · good Poor
Thu 16:00 1.26 · high 6.48 · high 29.00 · good Poor
Thu 17:00 1.28 · high 6.95 · high 29.00 · good Poor
Thu 18:00 1.28 · high 6.16 · high 29.00 · good Poor
Thu 19:00 1.28 · high 6.28 · high 29.00 · good Poor
Thu 20:00 1.28 · high 7.71 · high 28.90 · good Poor
Thu 21:00 1.28 · high 6.55 · high 28.90 · good Poor
Thu 22:00 1.28 · high 6.25 · high 28.90 · good Poor
Thu 23:00 1.26 · high 6.38 · high 28.90 · good Poor
Fri 00:00 1.26 · high 6.15 · high 28.90 · good Poor
Fri 01:00 1.24 · high 6.83 · high 28.90 · good Poor
Fri 02:00 1.24 · high 6.35 · high 29.00 · good Poor
Fri 03:00 1.22 · high 6.00 · high 29.00 · good Poor
Fri 04:00 1.24 · high 5.09 · good 29.00 · good Fair
Fri 05:00 1.24 · high 6.71 · high 29.10 · good Poor
Fri 06:00 1.26 · high 6.95 · high 29.10 · good Poor
Fri 07:00 1.24 · high 6.75 · high 29.10 · good Poor
Fri 08:00 1.24 · high 6.50 · high 29.10 · good Poor
Fri 09:00 1.22 · high 6.40 · high 29.10 · good Poor
Fri 10:00 1.22 · high 6.42 · high 29.00 · good Poor
Fri 11:00 1.20 · high 6.73 · high 29.00 · good Poor
Fri 12:00 1.20 · high 5.99 · high 29.00 · good Poor
Fri 13:00 1.18 · high 6.26 · high 29.00 · good Poor
Fri 14:00 1.18 · high 6.78 · high 29.00 · good Poor
Fri 15:00 1.16 · high 6.40 · high 29.00 · good Poor
Fri 16:00 1.16 · high 5.33 · good 29.00 · good Poor
Fri 17:00 1.16 · high 7.30 · high 29.00 · good Poor
Fri 18:00 1.16 · high 4.68 · good 29.00 · good Poor
Fri 19:00 1.16 · high 4.34 · good 29.00 · good Poor