MARINE REPORT / 72 HOURS

Perhentian Islands Snorkel Report Today

Malaysia · Updated Mon 17:29 (+08) · Source: Snapshot

The skinny

Go in the best window Data updated Mon 17:29 (+08)

Perhentian Islands has a usable snorkeling window around Mon 18:00. The main thing to watch is sea temperature.

Right now (forecast)

Good · 5.8/10

Mon 17:00 (+08)

Later today

Good · 5.9/10

Mon 18:00 (+08)

Next three days

Excellent · 8.2/10

Thu 11:00 (+08)

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

Score: 5.9/10

Best time: Mon 18:00

Main risk: Sea Temperature

No useful morning window is showing yet.

Best afternoon signal: Mon 18:00 (Good). Peak afternoon wind is about 2.9 m/s.

Email me when it is good

Sunrise

06:54

Sunset

18:53

Water

31.4°C

Max air

27.4°C

Sky

Cloudy

91% cloud

Good model window in the next 72 hours

Next good model window: Mon 18:00 (45% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Monday

✅ Good conditions

Main blocker: Sea temperature

Tuesday

✅ Excellent conditions

Main blocker: Sea temperature

Wednesday

✅ Excellent conditions

Main blocker: Sea temperature

Best available hours

The next good model window starts at Mon 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (71 hours)
  • Tide/current (47 hours)
  • Darkness (39 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: Tue 04:00

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

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

Sun 17:00 – Wed 17:00 (+08)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.76 around Mon 12:00; 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 0.14m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 0.76 to 4.93m/s).

Tides range from 0.24m to 1.38m; 1 of 24 hours are in or near peak slack windows.

72-hour historical overview
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
Good 🌟 Good
Good 🌟 Good
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
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Excellent ✅ Excellent
Excellent ✅ Excellent
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
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
Sun 17:00 0.14 · good 2.87 · good 31.20 · out of range Good
Sun 18:00 0.14 · good 3.22 · good 31.00 · out of range Good
Sun 19:00 0.14 · good 4.93 · good 30.90 · out of range Poor
Sun 20:00 0.14 · good 3.94 · good 30.90 · out of range Poor
Sun 21:00 0.14 · good 2.96 · good 30.90 · out of range Poor
Sun 22:00 0.14 · good 2.43 · good 30.90 · out of range Poor
Sun 23:00 0.14 · good 1.99 · good 30.90 · out of range Poor
Mon 00:00 0.14 · good 2.40 · good 30.80 · out of range Poor
Mon 01:00 0.14 · good 2.23 · good 30.80 · out of range Poor
Mon 02:00 0.14 · good 2.91 · good 30.80 · out of range Poor
Mon 03:00 0.14 · good 3.25 · good 30.70 · out of range Poor
Mon 04:00 0.12 · good 3.10 · good 30.70 · out of range Poor
Mon 05:00 0.12 · good 2.27 · good 30.70 · out of range Poor
Mon 06:00 0.12 · good 1.52 · good 30.60 · out of range Poor
Mon 07:00 0.14 · good 1.70 · good 30.60 · out of range Poor
Mon 08:00 0.14 · good 1.93 · good 30.70 · out of range Excellent
Mon 09:00 0.14 · good 2.10 · good 30.80 · out of range Good
Mon 10:00 0.14 · good 2.88 · good 30.90 · out of range Good
Mon 11:00 0.14 · good 2.80 · good 31.00 · out of range Excellent
Mon 12:00 0.14 · good 1.66 · good 31.20 · out of range Excellent
Mon 13:00 0.12 · good 1.15 · good 31.30 · out of range Good
Mon 14:00 0.12 · good 0.76 · good 31.40 · out of range Good
Mon 15:00 0.12 · good 2.17 · good 31.40 · out of range Good
Mon 16:00 0.14 · good 2.97 · good 31.60 · out of range Good
Mon 17:00 0.14 · good 2.21 · good 31.50 · out of range Good
Mon 18:00 0.14 · good 0.78 · good 31.40 · out of range Good
Mon 19:00 0.14 · good 1.61 · good 31.30 · out of range Poor
Mon 20:00 0.14 · good 0.92 · good 31.30 · out of range Poor
Mon 21:00 0.14 · good 1.14 · good 31.20 · out of range Poor
Mon 22:00 0.12 · good 1.37 · good 31.20 · out of range Poor
Mon 23:00 0.12 · good 1.66 · good 31.10 · out of range Poor
Tue 00:00 0.12 · good 2.24 · good 31.10 · out of range Poor
Tue 01:00 0.12 · good 2.89 · good 31.00 · out of range Poor
Tue 02:00 0.12 · good 1.82 · good 31.00 · out of range Poor
Tue 03:00 0.12 · good 1.95 · good 30.90 · out of range Poor
Tue 04:00 0.12 · good 2.37 · good 30.90 · out of range Poor
Tue 05:00 0.12 · good 3.19 · good 30.90 · out of range Poor
Tue 06:00 0.12 · good 3.56 · good 30.90 · out of range Poor
Tue 07:00 0.12 · good 4.27 · good 30.90 · out of range Poor
Tue 08:00 0.12 · good 1.97 · good 30.90 · out of range Good
Tue 09:00 0.12 · good 2.85 · good 31.00 · out of range Good
Tue 10:00 0.12 · good 3.04 · good 31.10 · out of range Good
Tue 11:00 0.12 · good 2.95 · good 31.30 · out of range Good
Tue 12:00 0.12 · good 2.16 · good 31.50 · out of range Excellent
Tue 13:00 0.12 · good 2.28 · good 31.60 · out of range Excellent
Tue 14:00 0.12 · good 0.75 · good 31.70 · out of range Good
Tue 15:00 0.12 · good 1.35 · good 31.70 · out of range Good
Tue 16:00 0.10 · good 2.83 · good 31.70 · out of range Good
Tue 17:00 0.10 · good 1.36 · good 31.70 · out of range Good
Tue 18:00 0.12 · good 0.40 · good 31.40 · out of range Good
Tue 19:00 0.12 · good 0.93 · good 31.30 · out of range Poor
Tue 20:00 0.12 · good 2.21 · good 31.30 · out of range Poor
Tue 21:00 0.12 · good 1.88 · good 31.20 · out of range Poor
Tue 22:00 0.10 · good 1.86 · good 31.20 · out of range Poor
Tue 23:00 0.10 · good 1.49 · good 31.10 · out of range Poor
Wed 00:00 0.10 · good 1.44 · good 31.10 · out of range Poor
Wed 01:00 0.10 · good 1.60 · good 31.10 · out of range Poor
Wed 02:00 0.10 · good 1.30 · good 31.00 · out of range Poor
Wed 03:00 0.10 · good 3.15 · good 31.00 · out of range Poor
Wed 04:00 0.12 · good 3.16 · good 31.00 · out of range Poor
Wed 05:00 0.12 · good 1.58 · good 30.90 · out of range Poor
Wed 06:00 0.12 · good 3.68 · good 30.90 · out of range Poor
Wed 07:00 0.12 · good 2.64 · good 30.90 · out of range Poor
Wed 08:00 0.12 · good 2.76 · good 31.00 · out of range Excellent
Wed 09:00 0.12 · good 2.29 · good 31.10 · out of range Excellent
Wed 10:00 0.12 · good 1.97 · good 31.20 · out of range Excellent
Wed 11:00 0.12 · good 1.19 · good 31.40 · out of range Excellent
Wed 12:00 0.12 · good 0.60 · good 31.60 · out of range Excellent
Wed 13:00 0.12 · good 0.25 · good 31.70 · out of range Excellent
Wed 14:00 0.12 · good 1.86 · good 31.80 · out of range Excellent
Wed 15:00 0.12 · good 3.11 · good 31.80 · out of range Good
Wed 16:00 0.12 · good 3.67 · good 31.80 · out of range Good