MARINE REPORT / 72 HOURS

Perhentian Islands Snorkel Report Today

Malaysia · Updated Mon 23:55 (+08) · Source: Snapshot

The skinny

Go in the best window Data updated Mon 23:55 (+08)

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

Right now (forecast)

Poor · 0.0/10

Tue 01:00 (+08)

Later today

Excellent · 7.2/10

Tue 17:00 (+08)

Next three days

Excellent · 8.2/10

Thu 10:00 (+08)

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

Score: 7.2/10

Best time: Tue 08:00

Main risk: Sea Temperature

Best morning signal: Tue 08:00 (Good).

Best afternoon signal: Tue 17:00 (Excellent). Peak afternoon wind is about 3.5 m/s.

Email me when it is good

Sunrise

06:54

Sunset

18:53

Water

30.7°C

Max air

28.3°C

Sky

Cloudy

100% cloud

Good model window in the next 72 hours

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

3-day planner Best available Show data

3-day planner

Tuesday

✅ Excellent conditions

Main blocker: Sea temperature

Wednesday

✅ Excellent conditions

Main blocker: Sea temperature

Thursday

✅ Excellent conditions

Main blocker: Sea temperature

Best available hours

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

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (69 hours)
  • Tide/current (49 hours)
  • Darkness (36 hours)

Jellyfish drift risk

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

Low · 34/100

Low peak drift risk around Tue 19:00.

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: Tue 04:00

Tue 04:00, Wed 17:00, Thu 05:00, Thu 18:00

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

Mon 01:00 – Thu 01:00 (+08)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.78 around Mon 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 0.12m to 0.12m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.11 to 3.94m/s).

Tides range from 0.25m to 1.49m; 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
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
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
Good 🌟 Good
Good 🌟 Good
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
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
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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
Mon 01:00 0.12 · good 0.65 · good 30.90 · out of range Poor
Mon 02:00 0.12 · good 2.85 · good 30.80 · out of range Poor
Mon 03:00 0.12 · good 0.11 · good 30.80 · out of range Poor
Mon 04:00 0.12 · good 0.59 · good 30.70 · out of range Poor
Mon 05:00 0.12 · good 1.28 · good 30.70 · out of range Poor
Mon 06:00 0.12 · good 3.31 · good 30.70 · out of range Poor
Mon 07:00 0.12 · good 3.72 · good 30.70 · out of range Poor
Mon 08:00 0.12 · good 0.87 · good 30.70 · out of range Excellent
Mon 09:00 0.12 · good 0.95 · good 30.70 · out of range Excellent
Mon 10:00 0.12 · good 1.91 · good 30.80 · out of range Excellent
Mon 11:00 0.12 · good 2.40 · good 30.90 · out of range Good
Mon 12:00 0.12 · good 1.91 · good 30.90 · out of range Good
Mon 13:00 0.12 · good 1.71 · good 31.00 · out of range Good
Mon 14:00 0.12 · good 1.81 · good 31.00 · out of range Good
Mon 15:00 0.12 · good 2.48 · good 31.00 · out of range Good
Mon 16:00 0.12 · good 3.28 · good 31.00 · out of range Good
Mon 17:00 0.12 · good 3.94 · good 31.00 · out of range Good
Mon 18:00 0.12 · good 2.66 · good 30.90 · out of range Good
Mon 19:00 0.12 · good 2.29 · good 30.90 · out of range Poor
Mon 20:00 0.12 · good 0.99 · good 31.00 · out of range Poor
Mon 21:00 0.12 · good 1.48 · good 30.90 · out of range Poor
Mon 22:00 0.12 · good 1.86 · good 30.90 · out of range Poor
Mon 23:00 0.12 · good 2.17 · good 30.80 · out of range Poor
Tue 00:00 0.12 · good 2.41 · good 30.80 · out of range Poor
Tue 01:00 0.12 · good 2.40 · good 30.80 · out of range Poor
Tue 02:00 0.12 · good 1.09 · good 30.70 · out of range Poor
Tue 03:00 0.12 · good 1.70 · good 30.70 · out of range Poor
Tue 04:00 0.12 · good 2.11 · good 30.60 · out of range Poor
Tue 05:00 0.12 · good 2.30 · good 30.60 · out of range Poor
Tue 06:00 0.12 · good 1.88 · good 30.60 · out of range Poor
Tue 07:00 0.12 · good 2.39 · good 30.60 · out of range Poor
Tue 08:00 0.12 · good 3.06 · good 30.60 · out of range Good
Tue 09:00 0.12 · good 2.31 · good 30.60 · out of range Good
Tue 10:00 0.12 · good 1.15 · good 30.80 · out of range Excellent
Tue 11:00 0.12 · good 2.02 · good 30.90 · out of range Good
Tue 12:00 0.12 · good 2.70 · good 31.00 · out of range Good
Tue 13:00 0.14 · good 3.75 · good 31.20 · out of range Good
Tue 14:00 0.14 · good 4.09 · good 31.20 · out of range Good
Tue 15:00 0.14 · good 3.00 · good 31.20 · out of range Good
Tue 16:00 0.14 · good 2.95 · good 31.20 · out of range Good
Tue 17:00 0.14 · good 2.91 · good 31.20 · out of range Good
Tue 18:00 0.14 · good 2.56 · good 31.20 · out of range Good
Tue 19:00 0.12 · good 1.22 · good 31.10 · out of range Poor
Tue 20:00 0.12 · good 2.43 · good 31.00 · out of range Poor
Tue 21:00 0.12 · good 2.84 · good 31.00 · out of range Poor
Tue 22:00 0.12 · good 2.39 · good 30.90 · out of range Poor
Tue 23:00 0.12 · good 1.87 · good 30.90 · out of range Poor
Wed 00:00 0.12 · good 1.86 · good 30.90 · out of range Poor
Wed 01:00 0.14 · good 1.46 · good 30.90 · out of range Poor
Wed 02:00 0.14 · good 1.95 · good 30.80 · out of range Poor
Wed 03:00 0.14 · good 1.81 · good 30.80 · out of range Poor
Wed 04:00 0.14 · good 1.86 · good 30.70 · out of range Poor
Wed 05:00 0.14 · good 1.45 · good 30.70 · out of range Poor
Wed 06:00 0.14 · good 1.50 · good 30.70 · out of range Poor
Wed 07:00 0.14 · good 2.07 · good 30.70 · out of range Poor
Wed 08:00 0.14 · good 1.35 · good 30.70 · out of range Excellent
Wed 09:00 0.14 · good 1.58 · good 30.80 · out of range Excellent
Wed 10:00 0.14 · good 1.25 · good 31.00 · out of range Good
Wed 11:00 0.14 · good 0.93 · good 31.20 · out of range Good
Wed 12:00 0.14 · good 0.30 · good 31.30 · out of range Good
Wed 13:00 0.14 · good 0.46 · good 31.50 · out of range Good
Wed 14:00 0.14 · good 1.48 · good 31.60 · out of range Good
Wed 15:00 0.14 · good 2.20 · good 31.60 · out of range Good
Wed 16:00 0.14 · good 3.47 · good 31.50 · out of range Good
Wed 17:00 0.14 · good 3.40 · good 31.50 · out of range Good
Wed 18:00 0.14 · good 3.47 · good 31.40 · out of range Good
Wed 19:00 0.14 · good 4.56 · good 31.30 · out of range Poor
Wed 20:00 0.14 · good 5.72 · high 31.20 · out of range Poor
Wed 21:00 0.14 · good 5.80 · high 31.20 · out of range Poor
Wed 22:00 0.14 · good 4.96 · good 31.10 · out of range Poor
Wed 23:00 0.16 · good 4.63 · good 31.10 · out of range Poor
Thu 00:00 0.16 · good 4.49 · good 31.00 · out of range Poor