SnorkelForecast.com

Heron Island Snorkel Report Today

Australia · Updated Fri 03:24 (AEST) · Source: Snapshot

The skinny

Marginal Report Fri 14:50

Heron Island looks marginal today. The least-bad daylight window is around Mon 12:00, but waves is limiting the forecast.

Score: 3.3/10

Best time: Mon 12:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Fri 15:00 (Poor). Peak afternoon wind is about 7.7 m/s.

Email me when it is good

Sunrise

06:31

Sunset

17:26

Water

21.0°C

Max air

20.6°C

Sky

Clear

0% cloud

No safe window in the next 72 hours

Use the best-available section for the least-bad times.

3-day planner Best available Show data

3-day planner

Friday

❌ poor conditions

Main blocker: Waves

Saturday

❌ poor conditions

Main blocker: Waves

Sunday

⚠️ fair conditions

Main blocker: Waves

Best available hours

  • Mon 02:00 — Fair (0.37) · still limited by waves, wind
  • Sun 07:00 — Fair (0.35) · still limited by waves, wind
  • Sun 06:00 — Fair (0.35) · still limited by waves, wind

Why this verdict

Main blockers across the next 72 hours:

  • Waves (70 hours)
  • Wind (70 hours)
  • Tide/current (66 hours)

Jellyfish drift risk

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

Low · 26/100

Low drift risk now.

water is warm enough for occasional jellyfish; 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: Fri 19:00

Fri 07:00, Fri 19:00, Sat 08:00, Sat 20:00, Sun 09:00, Sun 21:00

Nearby alternatives in Australia

Lady Elliot Island

110 km away

⚠️ Fair

Whitsundays

462 km away

❌ Poor

Byron Bay

603 km away

✅ Good

Lord Howe Island

1145 km away

❌ Poor

Advanced forecast data

Viewing historical data

Wed 04:00 – Sat 04:00 (AEST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.0 around Wed 14:00; 0 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.

0/24 sampled hours stay at or below 0.36m (range 0.82m to 1.24m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 29.5 to 42.3m/s).

Tides range from -0.37m to 1.33m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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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 and safety gate (outside daylight scores lower).
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Wed 04:00 0.84 · high 29.50 · high 22.00 · good poor
Wed 05:00 0.84 · high 30.50 · high 22.10 · good poor
Wed 06:00 0.82 · high 30.90 · high 22.10 · good poor
Wed 07:00 0.84 · high 32.20 · high 22.10 · good poor
Wed 08:00 0.88 · high 31.30 · high 22.10 · good poor
Wed 09:00 0.90 · high 34.00 · high 22.00 · good poor
Wed 10:00 0.92 · high 34.70 · high 22.00 · good poor
Wed 11:00 0.96 · high 35.50 · high 22.00 · good poor
Wed 12:00 0.98 · high 35.10 · high 22.00 · good poor
Wed 13:00 1.00 · high 36.20 · high 22.00 · good poor
Wed 14:00 1.20 · high 41.40 · high 21.90 · good poor
Wed 15:00 1.24 · high 42.10 · high 21.80 · good poor
Wed 16:00 1.22 · high 42.30 · high 21.80 · good poor
Wed 17:00 1.22 · high 41.10 · high 21.80 · good poor
Wed 18:00 1.20 · high 41.40 · high 21.80 · good poor
Wed 19:00 1.18 · high 39.90 · high 21.80 · good poor
Wed 20:00 1.16 · high 39.80 · high 21.70 · good poor
Wed 21:00 1.14 · high 38.50 · high 21.70 · good poor
Wed 22:00 1.12 · high 36.70 · high 21.70 · good poor
Wed 23:00 1.12 · high 38.40 · high 21.70 · good poor
Thu 00:00 1.10 · high 41.20 · high 21.70 · good poor
Thu 01:00 1.12 · high 39.50 · high 21.70 · good poor
Thu 02:00 1.12 · high 41.60 · high 21.80 · good poor
Thu 03:00 1.14 · high 41.60 · high 21.80 · good poor
Thu 04:00 1.14 · high 42.10 · high 21.80 · good poor
Thu 05:00 1.16 · high 40.50 · high 21.90 · good poor
Thu 06:00 1.16 · high 38.00 · high 21.90 · good poor
Thu 07:00 1.16 · high 37.40 · high 21.90 · good poor
Thu 08:00 1.16 · high 37.70 · high 21.90 · good poor
Thu 09:00 1.16 · high 38.20 · high 21.80 · good poor
Thu 10:00 1.14 · high 38.90 · high 21.80 · good poor
Thu 11:00 1.14 · high 38.10 · high 21.80 · good poor
Thu 12:00 1.12 · high 36.00 · high 21.80 · good poor
Thu 13:00 1.10 · high 34.70 · high 21.80 · good poor
Thu 14:00 1.08 · high 34.70 · high 21.70 · good poor
Thu 15:00 1.06 · high 32.90 · high 21.70 · good poor
Thu 16:00 1.04 · high 33.10 · high 21.70 · good poor
Thu 17:00 1.04 · high 33.00 · high 21.70 · good poor
Thu 18:00 1.02 · high 31.90 · high 21.70 · good poor
Thu 19:00 1.02 · high 31.00 · high 21.70 · good poor
Thu 20:00 1.04 · high 32.80 · high 21.60 · good poor
Thu 21:00 1.04 · high 35.00 · high 21.60 · good poor
Thu 22:00 1.06 · high 35.10 · high 21.60 · good poor
Thu 23:00 1.10 · high 35.60 · high 21.60 · good poor
Fri 00:00 1.12 · high 37.00 · high 21.60 · good poor
Fri 01:00 1.12 · high 36.80 · high 21.60 · good poor
Fri 02:00 1.12 · high 36.50 · high 21.70 · good poor
Fri 03:00 1.12 · high 33.70 · high 21.70 · good poor
Fri 04:00 1.12 · high 36.90 · high 21.70 · good poor
Fri 05:00 1.14 · high 33.70 · high 21.70 · good poor
Fri 06:00 1.14 · high 35.60 · high 21.70 · good poor
Fri 07:00 1.14 · high 36.30 · high 21.70 · good poor
Fri 08:00 1.12 · high 37.10 · high 21.70 · good poor
Fri 09:00 1.12 · high 36.20 · high 21.70 · good poor
Fri 10:00 1.12 · high 36.80 · high 21.70 · good poor
Fri 11:00 1.12 · high 37.30 · high 21.60 · good poor
Fri 12:00 1.12 · high 34.00 · high 21.60 · good poor
Fri 13:00 1.12 · high 38.30 · high 21.60 · good poor
Fri 14:00 1.12 · high 37.20 · high 21.60 · good poor
Fri 15:00 1.12 · high 38.60 · high 21.60 · good poor
Fri 16:00 1.10 · high 36.90 · high 21.60 · good poor
Fri 17:00 1.10 · high 35.10 · high 21.50 · good poor
Fri 18:00 1.08 · high 32.50 · high 21.50 · good poor
Fri 19:00 1.06 · high 32.90 · high 21.50 · good poor
Fri 20:00 1.04 · high 28.80 · high 21.50 · good poor
Fri 21:00 1.02 · high 25.70 · high 21.50 · good poor
Fri 22:00 1.00 · high 25.00 · high 21.50 · good poor
Fri 23:00 1.00 · high 27.50 · high 21.50 · good poor
Sat 00:00 0.98 · high 25.10 · high 21.50 · good poor
Sat 01:00 0.94 · high 25.10 · high 21.60 · good poor
Sat 02:00 0.92 · high 31.10 · high 21.60 · good poor
Sat 03:00 0.88 · high 27.50 · high 21.70 · good poor