MARINE REPORT / 72 HOURS

Derawan Snorkel Report Today

Indonesia · Updated Sun 06:59 (WITA) · Source: Snapshot

The skinny

Go in the best window Data updated Sun 06:59 (WITA)

Derawan has a usable snorkeling window around Sun 11:00. The main thing to watch is sea temperature.

Right now (forecast)

Good · 6.8/10

Sun 10:00 (WITA)

Later today

Excellent · 8.0/10

Sun 13:00 (WITA)

Next three days

Excellent · 8.2/10

Mon 11:00 (WITA)

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

Score: 8.0/10

Best time: Sun 11:00

Main risk: Sea Temperature

Best morning signal: Sun 11:00 (Excellent).

Best afternoon signal: Sun 13:00 (Excellent). Peak afternoon wind is about 2.5 m/s.

Email me when it is good

Sunrise

05:50

Sunset

17:54

Water

30.6°C

Max air

29.0°C

Sky

Partly cloudy

47% cloud

Good model window in the next 72 hours

Next good model window: Sun 11:00–17:00 (40% of the next 72h meets the model threshold)

3-day planner Best available Show data

3-day planner

Sunday

✅ Excellent conditions

Main blocker: Sea temperature

Monday

✅ Excellent conditions

Main blocker: Tide/current

Tuesday

✅ Excellent conditions

Main blocker: Sea temperature

Best available hours

The next good model window starts at Sun 11:00 and lasts until 17:00.

Why this verdict

Main blockers across the next 72 hours:

  • Tide/current (67 hours)
  • Sea temperature (62 hours)
  • Darkness (40 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: Wed 02:00

Sun 21:00, Mon 23:00, Wed 02:00

Nearby alternatives in Indonesia

Bunaken

728 km away

✅ Good

Wakatobi

1033 km away

✅ Good

Gili Trawangan

1208 km away

✅ Good

Gili Air

1208 km away

✅ Good

Advanced forecast data

Viewing historical data

Wed 10:00 – Sat 10:00 (WITA)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.8 around Wed 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 0.08m to 0.12m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 1.3 to 4.93m/s).

Tides range from -0.04m to 1.56m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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
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
Good 🌟 Good
Good 🌟 Good
Excellent ✅ Excellent
Excellent ✅ Excellent
Excellent ✅ Excellent
Good 🌟 Good
Good 🌟 Good
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
Excellent ✅ Excellent
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 10:00 0.12 · good 1.68 · good 29.90 · good Excellent
Wed 11:00 0.12 · good 1.30 · good 30.00 · good Excellent
Wed 12:00 0.12 · good 1.47 · good 30.10 · good Excellent
Wed 13:00 0.10 · good 1.70 · good 30.30 · good Excellent
Wed 14:00 0.10 · good 3.24 · good 30.30 · good Excellent
Wed 15:00 0.10 · good 3.14 · good 30.30 · good Excellent
Wed 16:00 0.10 · good 3.11 · good 30.30 · good Excellent
Wed 17:00 0.10 · good 2.97 · good 30.30 · good Excellent
Wed 18:00 0.10 · good 3.26 · good 30.20 · good Excellent
Wed 19:00 0.08 · good 3.76 · good 30.20 · good Poor
Wed 20:00 0.08 · good 3.74 · good 30.10 · good Poor
Wed 21:00 0.08 · good 4.01 · good 30.10 · good Poor
Wed 22:00 0.08 · good 3.56 · good 30.10 · good Poor
Wed 23:00 0.08 · good 2.97 · good 30.10 · good Poor
Thu 00:00 0.08 · good 3.63 · good 30.00 · good Poor
Thu 01:00 0.08 · good 3.57 · good 30.00 · good Poor
Thu 02:00 0.08 · good 3.06 · good 30.00 · good Poor
Thu 03:00 0.08 · good 4.93 · good 30.00 · good Poor
Thu 04:00 0.08 · good 1.77 · good 30.00 · good Poor
Thu 05:00 0.08 · good 3.98 · good 30.00 · good Poor
Thu 06:00 0.08 · good 3.30 · good 30.00 · good Poor
Thu 07:00 0.08 · good 2.71 · good 30.00 · good Poor
Thu 08:00 0.08 · good 2.40 · good 30.10 · good Excellent
Thu 09:00 0.08 · good 2.04 · good 30.10 · good Good
Thu 10:00 0.08 · good 1.70 · good 30.20 · good Good
Thu 11:00 0.08 · good 0.99 · good 30.30 · good Good
Thu 12:00 0.08 · good 1.25 · good 30.40 · good Good
Thu 13:00 0.08 · good 1.72 · good 30.50 · out of range Good
Thu 14:00 0.08 · good 2.12 · good 30.60 · out of range Good
Thu 15:00 0.08 · good 3.04 · good 30.60 · out of range Good
Thu 16:00 0.08 · good 3.35 · good 30.60 · out of range Good
Thu 17:00 0.08 · good 3.66 · good 30.50 · out of range Good
Thu 18:00 0.08 · good 4.04 · good 30.50 · out of range Good
Thu 19:00 0.08 · good 4.12 · good 30.40 · good Poor
Thu 20:00 0.08 · good 3.72 · good 30.40 · good Poor
Thu 21:00 0.08 · good 3.71 · good 30.40 · good Poor
Thu 22:00 0.08 · good 3.67 · good 30.40 · good Poor
Thu 23:00 0.08 · good 3.71 · good 30.40 · good Poor
Fri 00:00 0.08 · good 3.45 · good 30.40 · good Poor
Fri 01:00 0.08 · good 3.29 · good 30.40 · good Poor
Fri 02:00 0.08 · good 2.76 · good 30.40 · good Poor
Fri 03:00 0.08 · good 2.89 · good 30.40 · good Poor
Fri 04:00 0.08 · good 2.09 · good 30.30 · good Poor
Fri 05:00 0.08 · good 2.73 · good 30.30 · good Poor
Fri 06:00 0.08 · good 3.28 · good 30.30 · good Poor
Fri 07:00 0.08 · good 3.20 · good 30.30 · good Poor
Fri 08:00 0.10 · good 2.77 · good 30.30 · good Good
Fri 09:00 0.10 · good 1.30 · good 30.40 · good Good
Fri 10:00 0.10 · good 1.08 · good 30.40 · good Excellent
Fri 11:00 0.10 · good 1.83 · good 30.50 · out of range Excellent
Fri 12:00 0.10 · good 1.73 · good 30.60 · out of range Excellent
Fri 13:00 0.10 · good 2.10 · good 30.70 · out of range Good
Fri 14:00 0.10 · good 2.26 · good 30.70 · out of range Good
Fri 15:00 0.10 · good 2.58 · good 30.70 · out of range Excellent
Fri 16:00 0.10 · good 2.94 · good 30.70 · out of range Excellent
Fri 17:00 0.10 · good 3.38 · good 30.60 · out of range Excellent
Fri 18:00 0.10 · good 3.52 · good 30.60 · out of range Excellent
Fri 19:00 0.08 · good 2.48 · good 30.50 · out of range Poor
Fri 20:00 0.08 · good 2.61 · good 30.50 · out of range Poor
Fri 21:00 0.08 · good 2.26 · good 30.50 · out of range Poor
Fri 22:00 0.08 · good 1.70 · good 30.40 · good Poor
Fri 23:00 0.08 · good 1.17 · good 30.40 · good Poor
Sat 00:00 0.08 · good 1.45 · good 30.40 · good Poor
Sat 01:00 0.08 · good 0.46 · good 30.40 · good Poor
Sat 02:00 0.08 · good 0.90 · good 30.40 · good Poor
Sat 03:00 0.08 · good 1.88 · good 30.40 · good Poor
Sat 04:00 0.08 · good 0.96 · good 30.30 · good Poor
Sat 05:00 0.08 · good 0.11 · good 30.30 · good Poor
Sat 06:00 0.08 · good 1.30 · good 30.30 · good Poor
Sat 07:00 0.08 · good 0.35 · good 30.30 · good Poor
Sat 08:00 0.08 · good 0.91 · good 30.30 · good Excellent
Sat 09:00 0.08 · good 0.82 · good 30.40 · good Excellent