MARINE REPORT / 72 HOURS

Surin Islands Snorkel Report Today

Thailand · Updated Sun 09:42 (+07) · Source: Snapshot

The skinny

Go in the best window Data updated Sun 09:42 (+07)

Surin Islands has a usable snorkeling window around Sun 11:00. The main thing to watch is sea temperature.

Right now (forecast)

Good · 6.5/10

Sun 10:00 (+07)

Later today

Excellent · 7.3/10

Sun 13:00 (+07)

Next three days

Excellent · 7.3/10

Sun 13:00 (+07)

Model estimates using Open-Meteo; not observations or safety guarantees. Check official advisories and conditions at the beach.

Score: 7.3/10

Best time: Sun 11:00

Main risk: Sea Temperature

Best morning signal: Sun 11:00 (Good).

Best afternoon signal: Sun 13:00 (Excellent). Peak afternoon wind is about 2.8 m/s.

Email me when it is good

Sunrise

06:16

Sunset

18:10

Water

30.5°C

Max air

28.0°C

Sky

Cloudy

95% cloud

Good model window in the next 72 hours

Next good model window: Sun 11:00–18:00 (39% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Sunday

✅ Excellent conditions

Main blocker: Sea temperature

Monday

✅ Good conditions

Main blocker: Tide/current

Tuesday

✅ Good conditions

Main blocker: Waves

Best available hours

The next good model window starts at Sun 11:00 and lasts until 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Waves (36 hours)
  • Darkness (36 hours)
  • Tide/current (30 hours)

Jellyfish drift risk

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

Low · 31/100

Low peak drift risk around Sun 17:00.

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

Next early morning high tide: Mon 02:00

Sun 14:00, Mon 02:00, Mon 16:00, Tue 04:00, Tue 18:00, Wed 06:00

Nearby alternatives in Thailand

Similan Islands

89 km away

✅ Good

Railay

189 km away

✅ Good

Koh Phi Phi

212 km away

✅ Good

Koh Tao

229 km away

✅ Good

Advanced forecast data

Viewing historical data

Thu 10:00 – Sun 10:00 (+07)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.37 around Thu 15:00; 2 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 0.92m to 1.1m).

Wind is at or below 5.4m/s in 16/24 sampled hours (range 2.41 to 7.92m/s).

Tides range from -0.42m to 1.6m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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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
Thu 10:00 1.10 · high 7.92 · high 28.60 · good Poor
Thu 11:00 1.08 · high 7.16 · high 28.70 · good Poor
Thu 12:00 1.06 · high 7.20 · high 28.70 · good Poor
Thu 13:00 1.04 · high 4.67 · good 28.80 · good Poor
Thu 14:00 1.02 · high 4.30 · good 28.80 · good Poor
Thu 15:00 1.02 · high 4.69 · good 28.80 · good Fair
Thu 16:00 1.00 · high 6.58 · high 28.80 · good Poor
Thu 17:00 1.00 · high 6.31 · high 28.80 · good Poor
Thu 18:00 1.02 · high 4.35 · good 28.80 · good Poor
Thu 19:00 1.00 · high 3.14 · good 28.60 · good Poor
Thu 20:00 0.98 · high 3.37 · good 28.60 · good Poor
Thu 21:00 0.98 · high 5.05 · good 28.60 · good Poor
Thu 22:00 0.96 · high 4.75 · good 28.50 · good Poor
Thu 23:00 0.96 · high 4.30 · good 28.50 · good Poor
Fri 00:00 0.96 · high 6.12 · high 28.50 · good Poor
Fri 01:00 0.96 · high 6.50 · high 28.50 · good Poor
Fri 02:00 0.96 · high 4.72 · good 28.50 · good Poor
Fri 03:00 0.94 · high 3.92 · good 28.50 · good Poor
Fri 04:00 0.94 · high 4.80 · good 28.50 · good Poor
Fri 05:00 0.94 · high 4.49 · good 28.50 · good Poor
Fri 06:00 0.92 · high 5.69 · high 28.50 · good Poor
Fri 07:00 0.92 · high 3.59 · good 28.50 · good Poor
Fri 08:00 0.92 · high 2.69 · good 28.60 · good Fair
Fri 09:00 0.92 · high 2.41 · good 28.60 · good Poor
Fri 10:00 0.92 · high 2.20 · good 28.70 · good Poor
Fri 11:00 0.92 · high 6.39 · high 28.70 · good Poor
Fri 12:00 0.90 · high 4.56 · good 28.80 · good Poor
Fri 13:00 0.90 · high 5.52 · high 28.80 · good Poor
Fri 14:00 0.92 · high 5.54 · high 28.80 · good Poor
Fri 15:00 0.92 · high 5.55 · high 28.80 · good Poor
Fri 16:00 0.94 · high 7.75 · high 28.70 · good Poor
Fri 17:00 0.94 · high 4.28 · good 28.70 · good Poor
Fri 18:00 0.88 · high 5.69 · high 28.70 · good Poor
Fri 19:00 0.88 · high 5.75 · high 28.70 · good Poor
Fri 20:00 0.88 · high 6.07 · high 28.70 · good Poor
Fri 21:00 0.88 · high 6.39 · high 28.70 · good Poor
Fri 22:00 0.90 · high 5.95 · high 28.70 · good Poor
Fri 23:00 0.90 · high 5.36 · good 28.60 · good Poor
Sat 00:00 0.92 · high 5.15 · good 28.60 · good Poor
Sat 01:00 0.92 · high 5.61 · high 28.60 · good Poor
Sat 02:00 0.92 · high 6.50 · high 28.60 · good Poor
Sat 03:00 0.92 · high 6.68 · high 28.60 · good Poor
Sat 04:00 0.92 · high 6.45 · high 28.60 · good Poor
Sat 05:00 0.92 · high 7.24 · high 28.50 · good Poor
Sat 06:00 0.94 · high 6.07 · high 28.50 · good Poor
Sat 07:00 0.94 · high 6.27 · high 28.50 · good Poor
Sat 08:00 0.98 · high 6.21 · high 28.50 · good Poor
Sat 09:00 1.00 · high 7.34 · high 28.60 · good Poor
Sat 10:00 1.04 · high 8.06 · high 28.60 · good Poor
Sat 11:00 1.04 · high 8.63 · high 28.60 · good Poor
Sat 12:00 1.04 · high 5.75 · high 28.70 · good Poor
Sat 13:00 1.04 · high 7.40 · high 28.70 · good Poor
Sat 14:00 1.06 · high 8.89 · high 28.70 · good Poor
Sat 15:00 1.10 · high 7.68 · high 28.70 · good Poor
Sat 16:00 1.12 · high 6.44 · high 28.70 · good Poor
Sat 17:00 1.16 · high 5.56 · high 28.60 · good Poor
Sat 18:00 1.02 · high 6.05 · high 28.60 · good Poor
Sat 19:00 1.04 · high 8.56 · high 28.60 · good Poor
Sat 20:00 1.22 · high 7.29 · high 28.60 · good Poor
Sat 21:00 1.20 · high 6.10 · high 28.60 · good Poor
Sat 22:00 1.16 · high 5.76 · high 28.60 · good Poor
Sat 23:00 1.16 · high 6.29 · high 28.60 · good Poor
Sun 00:00 1.18 · high 7.12 · high 28.60 · good Poor
Sun 01:00 1.18 · high 8.70 · high 28.60 · good Poor
Sun 02:00 1.20 · high 8.92 · high 28.60 · good Poor
Sun 03:00 1.20 · high 7.08 · high 28.60 · good Poor
Sun 04:00 1.22 · high 7.79 · high 28.50 · good Poor
Sun 05:00 1.26 · high 8.49 · high 28.50 · good Poor
Sun 06:00 1.32 · high 8.90 · high 28.50 · good Poor
Sun 07:00 1.36 · high 8.43 · high 28.50 · good Poor
Sun 08:00 1.38 · high 8.16 · high 28.50 · good Poor
Sun 09:00 1.38 · high 7.47 · high 28.50 · good Poor