MARINE REPORT / 72 HOURS

Perhentian Islands Snorkel Report Today

Malaysia · Updated Tue 21:52 (+08) · Source: Snapshot

The skinny

Go in the best window Data updated Tue 21:52 (+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 00:00 (+08)

Later today

Excellent · 8.3/10

Wed 08:00 (+08)

Next three days

Excellent · 8.3/10

Wed 08:00 (+08)

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

Score: 8.3/10

Best time: Wed 08:00

Main risk: Sea Temperature

Best morning signal: Wed 08:00 (Excellent).

Best afternoon signal: Wed 13:00 (Excellent). Peak afternoon wind is about 3.2 m/s.

Email me when it is good

Sunrise

06:54

Sunset

18:52

Water

30.9°C

Max air

29.4°C

Sky

Cloudy

73% cloud

Good model window in the next 72 hours

Next good model window: Wed 08:00–18:00 (49% 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 (68 hours)
  • Tide/current (54 hours)
  • Darkness (35 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: 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

Wed 00:00 – Sat 00:00 (+08)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.8 around Wed 08:00; 11 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 0.22 to 4.69m/s).

Tides range from 0.38m to 1.48m; 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
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
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
Good 🌟 Good
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
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
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
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 0.06 · good 2.92 · good 30.90 · out of range Poor
Wed 01:00 0.06 · good 0.56 · good 30.90 · out of range Poor
Wed 02:00 0.06 · good 1.11 · good 30.80 · out of range Poor
Wed 03:00 0.06 · good 1.26 · good 30.80 · out of range Poor
Wed 04:00 0.06 · good 0.82 · good 30.70 · out of range Poor
Wed 05:00 0.06 · good 0.58 · good 30.70 · out of range Poor
Wed 06:00 0.06 · good 2.30 · good 30.60 · out of range Poor
Wed 07:00 0.06 · good 4.69 · good 30.60 · out of range Poor
Wed 08:00 0.06 · good 0.22 · good 30.60 · out of range Excellent
Wed 09:00 0.06 · good 0.34 · good 30.70 · out of range Excellent
Wed 10:00 0.06 · good 1.25 · good 30.80 · out of range Excellent
Wed 11:00 0.06 · good 1.36 · good 30.90 · out of range Excellent
Wed 12:00 0.06 · good 0.71 · good 31.00 · out of range Excellent
Wed 13:00 0.06 · good 0.85 · good 31.10 · out of range Excellent
Wed 14:00 0.06 · good 1.97 · good 31.10 · out of range Excellent
Wed 15:00 0.06 · good 1.95 · good 31.10 · out of range Excellent
Wed 16:00 0.04 · good 2.32 · good 31.10 · out of range Excellent
Wed 17:00 0.04 · good 2.44 · good 31.10 · out of range Excellent
Wed 18:00 0.04 · good 1.98 · good 31.10 · out of range Excellent
Wed 19:00 0.04 · good 1.13 · good 30.80 · out of range Poor
Wed 20:00 0.04 · good 2.82 · good 30.80 · out of range Poor
Wed 21:00 0.04 · good 2.43 · good 30.80 · out of range Poor
Wed 22:00 0.04 · good 1.01 · good 30.80 · out of range Poor
Wed 23:00 0.04 · good 2.94 · good 30.70 · out of range Poor
Thu 00:00 0.04 · good 0.62 · good 30.70 · out of range Poor
Thu 01:00 0.04 · good 2.00 · good 30.70 · out of range Poor
Thu 02:00 0.04 · good 3.76 · good 30.70 · out of range Poor
Thu 03:00 0.04 · good 3.78 · good 30.70 · out of range Poor
Thu 04:00 0.04 · good 2.37 · good 30.60 · out of range Poor
Thu 05:00 0.04 · good 4.01 · good 30.60 · out of range Poor
Thu 06:00 0.04 · good 3.23 · good 30.60 · out of range Poor
Thu 07:00 0.04 · good 4.05 · good 30.60 · out of range Poor
Thu 08:00 0.04 · good 3.77 · good 30.60 · out of range Excellent
Thu 09:00 0.04 · good 4.01 · good 30.70 · out of range Good
Thu 10:00 0.04 · good 2.33 · good 30.80 · out of range Excellent
Thu 11:00 0.04 · good 2.33 · good 31.00 · out of range Excellent
Thu 12:00 0.04 · good 1.74 · good 31.10 · out of range Excellent
Thu 13:00 0.04 · good 1.91 · good 31.20 · out of range Good
Thu 14:00 0.04 · good 1.95 · good 31.30 · out of range Good
Thu 15:00 0.04 · good 2.55 · good 31.30 · out of range Good
Thu 16:00 0.06 · good 1.85 · good 31.30 · out of range Good
Thu 17:00 0.06 · good 2.55 · good 31.20 · out of range Excellent
Thu 18:00 0.06 · good 2.27 · good 31.10 · out of range Good
Thu 19:00 0.06 · good 1.83 · good 31.30 · out of range Poor
Thu 20:00 0.06 · good 3.55 · good 31.20 · out of range Poor
Thu 21:00 0.08 · good 3.80 · good 31.20 · out of range Poor
Thu 22:00 0.08 · good 2.86 · good 31.10 · out of range Poor
Thu 23:00 0.08 · good 2.29 · good 31.00 · out of range Poor
Fri 00:00 0.08 · good 1.69 · good 31.00 · out of range Poor
Fri 01:00 0.10 · good 1.75 · good 30.90 · out of range Poor
Fri 02:00 0.10 · good 0.94 · good 30.90 · out of range Poor
Fri 03:00 0.10 · good 1.20 · good 30.80 · out of range Poor
Fri 04:00 0.10 · good 1.53 · good 30.80 · out of range Poor
Fri 05:00 0.10 · good 1.66 · good 30.80 · out of range Poor
Fri 06:00 0.10 · good 1.90 · good 30.70 · out of range Poor
Fri 07:00 0.10 · good 0.47 · good 30.70 · out of range Poor
Fri 08:00 0.10 · good 0.15 · good 30.80 · out of range Excellent
Fri 09:00 0.10 · good 0.34 · good 30.90 · out of range Excellent
Fri 10:00 0.10 · good 0.67 · good 31.00 · out of range Excellent
Fri 11:00 0.10 · good 1.13 · good 31.10 · out of range Excellent
Fri 12:00 0.10 · good 0.61 · good 31.30 · out of range Excellent
Fri 13:00 0.10 · good 0.83 · good 31.40 · out of range Excellent
Fri 14:00 0.10 · good 1.73 · good 31.50 · out of range Excellent
Fri 15:00 0.10 · good 1.74 · good 31.50 · out of range Good
Fri 16:00 0.10 · good 1.60 · good 31.50 · out of range Good
Fri 17:00 0.10 · good 1.62 · good 31.40 · out of range Good
Fri 18:00 0.10 · good 1.86 · good 31.40 · out of range Good
Fri 19:00 0.12 · good 4.21 · good 31.10 · out of range Poor
Fri 20:00 0.12 · good 2.36 · good 31.10 · out of range Poor
Fri 21:00 0.12 · good 3.86 · good 31.00 · out of range Poor
Fri 22:00 0.14 · good 3.42 · good 30.90 · out of range Poor
Fri 23:00 0.14 · good 3.31 · good 30.90 · out of range Poor