MARINE REPORT / 72 HOURS

Perhentian Islands Snorkel Report Today

Malaysia · Updated Wed 04:30 (+08) · Source: Snapshot

The skinny

Go in the best window Data updated Wed 04:30 (+08)

Perhentian Islands has a usable snorkeling window around Wed 08:00. The main thing to watch is sea temperature.

Right now (forecast)

Poor · 0.0/10

Wed 06:00 (+08)

Later today

Excellent · 7.9/10

Wed 10:00 (+08)

Next three days

Excellent · 7.9/10

Wed 10:00 (+08)

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

Score: 7.9/10

Best time: Wed 08:00

Main risk: Sea Temperature

Best morning signal: Wed 10:00 (Excellent).

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

Email me when it is good

Sunrise

06:54

Sunset

18:52

Water

30.7°C

Max air

29.1°C

Sky

Cloudy

81% cloud

Good model window in the next 72 hours

Next good model window: Wed 08:00–18:00 (48% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Wednesday

✅ Excellent conditions

Main blocker: Sea temperature

Thursday

✅ Excellent conditions

Main blocker: Sea temperature

Friday

✅ Good conditions

Main blocker: Sea temperature

Best available hours

The next good model window starts at Wed 08:00 and lasts until 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (69 hours)
  • Tide/current (57 hours)
  • Darkness (36 hours)

Jellyfish drift risk

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

Low · 34/100

Low peak drift risk around Wed 16:00.

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: Thu 05:00

Wed 17:00, Thu 05:00, Thu 18:00, Fri 19:00

Nearby alternatives in Malaysia

Redang Island

34 km away

✅ Good

Langkawi

328 km away

✅ Good

Tioman Island

382 km away

✅ Good

Mabul

1771 km away

✅ Good

Advanced forecast data

Viewing historical data

Fri 06:00 – Mon 06:00 (+08)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.76 around Fri 10:00; 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 0.06m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.88 to 4.3m/s).

Tides range from 0.01m to 1.44m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview
Poor ❌ Limited
Poor ❌ Limited
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Excellent ✅ Excellent
Good 🌟 Good
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Fri 06:00 0.06 · good 1.90 · good 30.60 · out of range Poor
Fri 07:00 0.06 · good 2.02 · good 30.50 · out of range Poor
Fri 08:00 0.06 · good 1.74 · good 30.60 · out of range Excellent
Fri 09:00 0.06 · good 2.08 · good 30.70 · out of range Excellent
Fri 10:00 0.06 · good 1.95 · good 30.80 · out of range Excellent
Fri 11:00 0.06 · good 1.79 · good 31.00 · out of range Excellent
Fri 12:00 0.06 · good 4.30 · good 31.10 · out of range Good
Fri 13:00 0.06 · good 2.22 · good 31.20 · out of range Good
Fri 14:00 0.06 · good 3.22 · good 31.30 · out of range Good
Fri 15:00 0.06 · good 3.65 · good 31.30 · out of range Good
Fri 16:00 0.04 · good 3.22 · good 31.30 · out of range Good
Fri 17:00 0.04 · good 3.20 · good 31.30 · out of range Good
Fri 18:00 0.04 · good 2.15 · good 31.20 · out of range Excellent
Fri 19:00 0.04 · good 1.99 · good 31.30 · out of range Good
Fri 20:00 0.04 · good 1.75 · good 31.20 · out of range Poor
Fri 21:00 0.04 · good 1.12 · good 31.20 · out of range Poor
Fri 22:00 0.04 · good 0.88 · good 31.10 · out of range Poor
Fri 23:00 0.04 · good 1.71 · good 31.10 · out of range Poor
Sat 00:00 0.04 · good 2.47 · good 31.10 · out of range Poor
Sat 01:00 0.04 · good 2.97 · good 31.00 · out of range Poor
Sat 02:00 0.04 · good 1.72 · good 31.00 · out of range Poor
Sat 03:00 0.04 · good 1.96 · good 30.90 · out of range Poor
Sat 04:00 0.04 · good 1.71 · good 30.90 · out of range Poor
Sat 05:00 0.04 · good 2.18 · good 30.90 · out of range Poor
Sat 06:00 0.04 · good 2.02 · good 30.80 · out of range Poor
Sat 07:00 0.04 · good 3.07 · good 30.80 · out of range Poor
Sat 08:00 0.04 · good 1.65 · good 30.80 · out of range Excellent
Sat 09:00 0.04 · good 3.31 · good 30.90 · out of range Excellent
Sat 10:00 0.04 · good 3.02 · good 31.00 · out of range Excellent
Sat 11:00 0.04 · good 3.35 · good 31.00 · out of range Excellent
Sat 12:00 0.04 · good 2.83 · good 31.10 · out of range Excellent
Sat 13:00 0.04 · good 3.11 · good 31.20 · out of range Good
Sat 14:00 0.04 · good 2.14 · good 31.30 · out of range Good
Sat 15:00 0.04 · good 3.02 · good 31.30 · out of range Good
Sat 16:00 0.04 · good 3.69 · good 31.30 · out of range Good
Sat 17:00 0.04 · good 3.07 · good 31.30 · out of range Good
Sat 18:00 0.04 · good 3.84 · good 31.20 · out of range Good
Sat 19:00 0.08 · good 4.04 · good 31.30 · out of range Poor
Sat 20:00 0.08 · good 0.56 · good 31.30 · out of range Poor
Sat 21:00 0.08 · good 2.15 · good 31.20 · out of range Poor
Sat 22:00 0.08 · good 1.83 · good 31.20 · out of range Poor
Sat 23:00 0.08 · good 2.47 · good 31.10 · out of range Poor
Sun 00:00 0.04 · good 3.18 · good 31.00 · out of range Poor
Sun 01:00 0.04 · good 2.95 · good 31.00 · out of range Poor
Sun 02:00 0.04 · good 2.28 · good 30.90 · out of range Poor
Sun 03:00 0.04 · good 1.73 · good 30.90 · out of range Poor
Sun 04:00 0.06 · good 2.18 · good 30.80 · out of range Poor
Sun 05:00 0.06 · good 2.36 · good 30.80 · out of range Poor
Sun 06:00 0.06 · good 1.87 · good 30.70 · out of range Poor
Sun 07:00 0.04 · good 1.34 · good 30.70 · out of range Poor
Sun 08:00 0.04 · good 0.82 · good 30.70 · out of range Excellent
Sun 09:00 0.04 · good 1.32 · good 30.80 · out of range Excellent
Sun 10:00 0.04 · good 1.81 · good 30.90 · out of range Excellent
Sun 11:00 0.04 · good 1.57 · good 31.00 · out of range Excellent
Sun 12:00 0.04 · good 1.00 · good 31.10 · out of range Excellent
Sun 13:00 0.04 · good 1.50 · good 31.20 · out of range Excellent
Sun 14:00 0.04 · good 1.30 · good 31.20 · out of range Excellent
Sun 15:00 0.04 · good 1.25 · good 31.20 · out of range Good
Sun 16:00 0.04 · good 1.70 · good 31.20 · out of range Good
Sun 17:00 0.04 · good 1.19 · good 31.20 · out of range Good
Sun 18:00 0.04 · good 0.93 · good 31.10 · out of range Good
Sun 19:00 0.04 · good 2.21 · good 31.30 · out of range Poor
Sun 20:00 0.04 · good 1.45 · good 31.20 · out of range Poor
Sun 21:00 0.04 · good 1.41 · good 31.20 · out of range Poor
Sun 22:00 0.04 · good 2.21 · good 31.10 · out of range Poor
Sun 23:00 0.04 · good 2.72 · good 31.10 · out of range Poor
Mon 00:00 0.04 · good 1.97 · good 31.00 · out of range Poor
Mon 01:00 0.04 · good 1.00 · good 31.00 · out of range Poor
Mon 02:00 0.04 · good 2.18 · good 30.90 · out of range Poor
Mon 03:00 0.04 · good 1.53 · good 30.90 · out of range Poor
Mon 04:00 0.04 · good 0.73 · good 30.80 · out of range Poor
Mon 05:00 0.04 · good 0.79 · good 30.70 · out of range Poor