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 02:00 (+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

98% cloud

Good model window in the next 72 hours

Next good model window: Tue 08:00–18:00 (49% 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 (68 hours)
  • Tide/current (48 hours)
  • Darkness (35 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

Sat 02:00 – Tue 02:00 (+08)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.78 around Sat 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 0.1m to 0.14m).

Wind is at or below 5.4m/s in 23/24 sampled hours (range 0.92 to 5.62m/s).

Tides range from 0.46m to 1.32m; 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
Excellent ✅ Excellent
Good 🌟 Good
Excellent ✅ Excellent
Good 🌟 Good
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
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
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
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
Sat 02:00 0.14 · good 1.35 · good 30.70 · out of range Poor
Sat 03:00 0.14 · good 0.92 · good 30.70 · out of range Poor
Sat 04:00 0.14 · good 1.43 · good 30.70 · out of range Poor
Sat 05:00 0.14 · good 2.35 · good 30.60 · out of range Poor
Sat 06:00 0.14 · good 2.82 · good 30.60 · out of range Poor
Sat 07:00 0.14 · good 2.89 · good 30.60 · out of range Poor
Sat 08:00 0.14 · good 3.23 · good 30.60 · out of range Excellent
Sat 09:00 0.14 · good 1.94 · good 30.70 · out of range Good
Sat 10:00 0.14 · good 1.91 · good 30.70 · out of range Excellent
Sat 11:00 0.14 · good 3.44 · good 30.80 · out of range Good
Sat 12:00 0.14 · good 2.11 · good 30.90 · out of range Excellent
Sat 13:00 0.14 · good 2.35 · good 30.90 · out of range Good
Sat 14:00 0.14 · good 2.89 · good 31.00 · out of range Good
Sat 15:00 0.14 · good 3.56 · good 31.00 · out of range Good
Sat 16:00 0.12 · good 4.22 · good 31.00 · out of range Good
Sat 17:00 0.12 · good 2.26 · good 30.90 · out of range Good
Sat 18:00 0.12 · good 4.46 · good 30.90 · out of range Good
Sat 19:00 0.12 · good 3.26 · good 31.00 · out of range Poor
Sat 20:00 0.12 · good 2.96 · good 31.00 · out of range Poor
Sat 21:00 0.12 · good 2.59 · good 30.90 · out of range Poor
Sat 22:00 0.12 · good 3.21 · good 30.80 · out of range Poor
Sat 23:00 0.12 · good 5.62 · high 30.80 · out of range Poor
Sun 00:00 0.10 · good 2.97 · good 30.70 · out of range Poor
Sun 01:00 0.10 · good 3.43 · good 30.70 · out of range Poor
Sun 02:00 0.10 · good 3.27 · good 30.60 · out of range Poor
Sun 03:00 0.10 · good 2.34 · good 30.60 · out of range Poor
Sun 04:00 0.10 · good 2.12 · good 30.60 · out of range Poor
Sun 05:00 0.10 · good 1.84 · good 30.60 · out of range Poor
Sun 06:00 0.10 · good 1.50 · good 30.60 · out of range Poor
Sun 07:00 0.10 · good 1.53 · good 30.60 · out of range Poor
Sun 08:00 0.10 · good 1.56 · good 30.60 · out of range Excellent
Sun 09:00 0.10 · good 1.93 · good 30.70 · out of range Excellent
Sun 10:00 0.10 · good 2.93 · good 30.80 · out of range Good
Sun 11:00 0.10 · good 0.50 · good 30.90 · out of range Good
Sun 12:00 0.10 · good 1.93 · good 31.00 · out of range Good
Sun 13:00 0.10 · good 0.94 · good 31.10 · out of range Good
Sun 14:00 0.10 · good 2.06 · good 31.20 · out of range Good
Sun 15:00 0.10 · good 2.44 · good 31.20 · out of range Good
Sun 16:00 0.10 · good 3.29 · good 31.20 · out of range Good
Sun 17:00 0.10 · good 3.65 · good 31.20 · out of range Good
Sun 18:00 0.10 · good 3.27 · good 31.20 · out of range Good
Sun 19:00 0.12 · good 1.29 · good 31.10 · out of range Poor
Sun 20:00 0.12 · good 3.06 · good 31.10 · out of range Poor
Sun 21:00 0.12 · good 3.10 · good 31.00 · out of range Poor
Sun 22:00 0.12 · good 4.04 · good 31.00 · out of range Poor
Sun 23:00 0.12 · good 3.67 · good 30.90 · out of range Poor
Mon 00:00 0.12 · good 3.51 · good 30.90 · out of range Poor
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