MARINE REPORT / 72 HOURS

Perhentian Islands Snorkel Report Today

Malaysia · Updated Mon 20:40 (+08) · Source: Snapshot

The skinny

Poor Data updated Mon 20:40 (+08)

Perhentian Islands has no good model window later today. Check the three-day outlook and official beach advisories.

Right now (forecast)

Poor · 0.0/10

Mon 21:00 (+08)

Later today

No fresh data for this period.

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: 0.0/10

Best time: -

Main risk: Sea Temperature

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:54

Sunset

18:53

Water

30.8°C

Max air

27.8°C

Sky

Cloudy

100% cloud

Good model window in the next 72 hours

Next good model window: Tue 08:00–18:00 (47% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Monday

❌ Poor 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 Tue 08:00 and lasts until 18:00.

Why this verdict

Main blockers across the next 72 hours:

  • Sea temperature (70 hours)
  • Tide/current (50 hours)
  • Darkness (37 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 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

Wed 21:00 – Sat 21:00 (+08)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.82 around Thu 11:00; 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 0.2m).

Wind is at or below 5.4m/s in 23/24 sampled hours (range 0.65 to 5.8m/s).

Tides range from 0.18m to 1.5m; 0 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
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Good 🌟 Good
Good 🌟 Good
Excellent ✅ Excellent
Excellent ✅ Excellent
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
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
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
Good 🌟 Good
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 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
Thu 01:00 0.14 · good 4.48 · good 31.00 · out of range Poor
Thu 02:00 0.14 · good 4.51 · good 30.90 · out of range Poor
Thu 03:00 0.14 · good 4.36 · good 30.90 · out of range Poor
Thu 04:00 0.14 · good 4.51 · good 30.80 · out of range Poor
Thu 05:00 0.14 · good 3.86 · good 30.80 · out of range Poor
Thu 06:00 0.14 · good 3.80 · good 30.70 · out of range Poor
Thu 07:00 0.14 · good 2.69 · good 30.70 · out of range Poor
Thu 08:00 0.14 · good 3.08 · good 30.70 · out of range Good
Thu 09:00 0.14 · good 2.33 · good 30.80 · out of range Good
Thu 10:00 0.12 · good 0.87 · good 30.90 · out of range Excellent
Thu 11:00 0.12 · good 0.65 · good 31.10 · out of range Excellent
Thu 12:00 0.12 · good 1.13 · good 31.30 · out of range Excellent
Thu 13:00 0.12 · good 1.60 · good 31.40 · out of range Excellent
Thu 14:00 0.12 · good 1.53 · good 31.50 · out of range Good
Thu 15:00 0.12 · good 2.12 · good 31.50 · out of range Good
Thu 16:00 0.12 · good 3.53 · good 31.50 · out of range Good
Thu 17:00 0.12 · good 5.18 · good 31.40 · out of range Good
Thu 18:00 0.12 · good 4.55 · good 31.30 · out of range Good
Thu 19:00 0.12 · good 2.82 · good 31.30 · out of range Poor
Thu 20:00 0.20 · good 2.16 · good 31.40 · out of range Poor
Thu 21:00 0.20 · good 1.45 · good 31.40 · out of range Poor
Thu 22:00 0.18 · good 0.63 · good 31.30 · out of range Poor
Thu 23:00 0.18 · good 0.11 · good 31.30 · out of range Poor
Fri 00:00 0.20 · good 1.27 · good 31.20 · out of range Poor
Fri 01:00 0.20 · good 1.82 · good 31.20 · out of range Poor
Fri 02:00 0.18 · good 2.20 · good 31.10 · out of range Poor
Fri 03:00 0.16 · good 2.49 · good 31.10 · out of range Poor
Fri 04:00 0.16 · good 2.30 · good 31.00 · out of range Poor
Fri 05:00 0.14 · good 1.63 · good 31.00 · out of range Poor
Fri 06:00 0.14 · good 1.06 · good 30.90 · out of range Poor
Fri 07:00 0.14 · good 1.44 · good 30.90 · out of range Poor
Fri 08:00 0.14 · good 1.21 · good 30.90 · out of range Good
Fri 09:00 0.14 · good 1.36 · good 31.00 · out of range Good
Fri 10:00 0.14 · good 1.30 · good 31.10 · out of range Excellent
Fri 11:00 0.14 · good 2.19 · good 31.30 · out of range Good
Fri 12:00 0.14 · good 2.26 · good 31.40 · out of range Good
Fri 13:00 0.14 · good 2.31 · good 31.60 · out of range Good
Fri 14:00 0.14 · good 2.77 · good 31.60 · out of range Good
Fri 15:00 0.14 · good 3.13 · good 31.60 · out of range Good
Fri 16:00 0.12 · good 3.56 · good 31.60 · out of range Good
Fri 17:00 0.12 · good 4.25 · good 31.60 · out of range Good
Fri 18:00 0.12 · good 2.87 · good 31.50 · out of range Good
Fri 19:00 0.14 · good 2.75 · good 31.30 · out of range Poor
Fri 20:00 0.14 · good 2.16 · good 31.20 · out of range Poor
Fri 21:00 0.14 · good 0.81 · good 31.20 · out of range Poor
Fri 22:00 0.14 · good 1.23 · good 31.20 · out of range Poor
Fri 23:00 0.14 · good 0.15 · good 31.10 · out of range Poor
Sat 00:00 0.14 · good 1.42 · good 31.10 · out of range Poor
Sat 01:00 0.14 · good 2.33 · good 31.10 · out of range Poor
Sat 02:00 0.14 · good 2.60 · good 31.10 · out of range Poor
Sat 03:00 0.14 · good 2.60 · good 31.00 · out of range Poor
Sat 04:00 0.14 · good 2.07 · good 31.00 · out of range Poor
Sat 05:00 0.14 · good 2.10 · good 30.90 · out of range Poor
Sat 06:00 0.14 · good 1.51 · good 30.90 · out of range Poor
Sat 07:00 0.14 · good 1.28 · good 30.90 · out of range Poor
Sat 08:00 0.14 · good 2.62 · good 30.90 · out of range Good
Sat 09:00 0.14 · good 2.60 · good 31.00 · out of range Good
Sat 10:00 0.14 · good 2.17 · good 31.10 · out of range Good
Sat 11:00 0.14 · good 2.38 · good 31.30 · out of range Good
Sat 12:00 0.14 · good 2.86 · good 31.40 · out of range Good
Sat 13:00 0.14 · good 3.63 · good 31.60 · out of range Good
Sat 14:00 0.14 · good 2.64 · good 31.60 · out of range Good
Sat 15:00 0.14 · good 2.62 · good 31.60 · out of range Good
Sat 16:00 0.14 · good 3.19 · good 31.60 · out of range Good
Sat 17:00 0.14 · good 2.87 · good 31.50 · out of range Good
Sat 18:00 0.14 · good 2.73 · good 31.30 · out of range Good
Sat 19:00 0.14 · good 1.05 · good 31.20 · out of range Poor
Sat 20:00 0.14 · good 1.17 · good 31.20 · out of range Poor