SnorkelForecast.com

Heron Island Snorkel Report Today

Australia · Updated Tue 04:13 (AEST) · Source: Snapshot · Showing fallback/stale data

The skinny

Go in the best window Report Wed 20:42

Heron Island has a usable snorkeling window around Thu 17:00. The main thing to watch is waves.

Score: 5.6/10

Best time: Thu 17:00

Main risk: Waves

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:31

Sunset

17:25

Water

20.8°C

Max air

21.0°C

Sky

Clear

10% cloud

Good window is available today

Next safe window: Thu 07:00 (2% of next 72h are suitable)

3-day planner Best available Show data

3-day planner

Wednesday

❌ poor conditions

Main blocker: Waves

Thursday

✅ good conditions

Main blocker: Waves

Friday

⚠️ fair conditions

Main blocker: Waves

Best available hours

Next safe window starts at Thu 07:00.

Why this verdict

Main blockers across the next 72 hours:

  • Waves (41 hours)
  • Tide/current (33 hours)
  • Darkness (29 hours)

Jellyfish drift risk

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

Low · 26/100

Low peak drift risk around Wed 23:00.

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: Wed 17:00

Wed 17:00, Thu 06:00, Thu 18:00

Nearby alternatives in Australia

Lady Elliot Island

110 km away

❌ Poor

Whitsundays

462 km away

❌ Poor

Byron Bay

603 km away

❌ Poor

Lord Howe Island

1145 km away

❌ Poor

Advanced forecast data

Viewing historical data

Sun 10:00 – Wed 10:00 (AEST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.24 around Mon 16:00; 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 1.42m to 1.68m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 38.8 to 48.2m/s).

Tides range from -0.41m to 1.48m; 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
Sun 10:00 1.46 · high 43.10 · high 21.70 · good poor
Sun 11:00 1.44 · high 43.50 · high 21.70 · good poor
Sun 12:00 1.42 · high 41.30 · high 21.60 · good poor
Sun 13:00 1.42 · high 40.90 · high 21.60 · good poor
Sun 14:00 1.42 · high 41.10 · high 21.60 · good poor
Sun 15:00 1.42 · high 40.70 · high 21.50 · good poor
Sun 16:00 1.42 · high 41.60 · high 21.50 · good poor
Sun 17:00 1.42 · high 39.10 · high 21.50 · good poor
Sun 18:00 1.42 · high 38.80 · high 21.40 · good poor
Sun 19:00 1.44 · high 39.40 · high 21.40 · good poor
Sun 20:00 1.46 · high 41.40 · high 21.40 · good poor
Sun 21:00 1.48 · high 45.30 · high 21.30 · good poor
Sun 22:00 1.50 · high 48.20 · high 21.30 · good poor
Sun 23:00 1.54 · high 44.80 · high 21.30 · good poor
Mon 00:00 1.56 · high 45.20 · high 21.30 · good poor
Mon 01:00 1.56 · high 48.20 · high 21.30 · good poor
Mon 02:00 1.58 · high 47.40 · high 21.30 · good poor
Mon 03:00 1.58 · high 47.70 · high 21.30 · good poor
Mon 04:00 1.60 · high 47.40 · high 21.40 · good poor
Mon 05:00 1.64 · high 47.00 · high 21.40 · good poor
Mon 06:00 1.66 · high 47.40 · high 21.40 · good poor
Mon 07:00 1.66 · high 47.60 · high 21.40 · good poor
Mon 08:00 1.68 · high 48.00 · high 21.30 · good poor
Mon 09:00 1.68 · high 48.20 · high 21.30 · good poor
Mon 10:00 1.52 · high 13.91 · high 21.30 · good poor
Mon 11:00 1.54 · high 13.58 · high 21.30 · good poor
Mon 12:00 1.54 · high 13.59 · high 21.20 · good poor
Mon 13:00 1.52 · high 13.49 · high 21.20 · good poor
Mon 14:00 1.48 · high 12.67 · high 21.20 · good poor
Mon 15:00 1.46 · high 12.23 · high 21.10 · good poor
Mon 16:00 1.44 · high 13.32 · high 21.10 · good poor
Mon 17:00 1.40 · high 12.31 · high 21.10 · good poor
Mon 18:00 1.38 · high 11.65 · high 21.00 · good poor
Mon 19:00 1.36 · high 11.94 · high 21.00 · good poor
Mon 20:00 1.36 · high 12.49 · high 21.00 · good poor
Mon 21:00 1.34 · high 12.21 · high 21.00 · good poor
Mon 22:00 1.34 · high 12.20 · high 20.90 · good poor
Mon 23:00 1.32 · high 12.17 · high 20.90 · good poor
Tue 00:00 1.32 · high 11.95 · high 20.90 · good poor
Tue 01:00 1.30 · high 11.48 · high 20.90 · good poor
Tue 02:00 1.28 · high 11.10 · high 21.00 · good poor
Tue 03:00 1.26 · high 10.95 · high 21.00 · good poor
Tue 04:00 1.26 · high 11.07 · high 21.00 · good poor
Tue 05:00 1.24 · high 11.38 · high 21.10 · good poor
Tue 06:00 1.24 · high 11.28 · high 21.10 · good poor
Tue 07:00 1.26 · high 11.20 · high 21.10 · good poor
Tue 08:00 1.26 · high 11.39 · high 21.00 · good poor
Tue 09:00 1.28 · high 11.85 · high 21.00 · good poor
Tue 10:00 1.30 · high 12.18 · high 21.00 · good poor
Tue 11:00 1.32 · high 12.59 · high 20.90 · good poor
Tue 12:00 1.34 · high 12.32 · high 20.90 · good poor
Tue 13:00 1.36 · high 12.80 · high 20.80 · good poor
Tue 14:00 1.40 · high 12.93 · high 20.80 · good poor
Tue 15:00 1.42 · high 12.64 · high 20.80 · good poor
Tue 16:00 1.38 · high 12.25 · high 20.70 · good poor
Tue 17:00 1.36 · high 11.50 · high 20.70 · good poor
Tue 18:00 1.32 · high 11.50 · high 20.70 · good poor
Tue 19:00 1.30 · high 11.73 · high 20.60 · good poor
Tue 20:00 1.30 · high 11.44 · high 20.60 · good poor
Tue 21:00 1.28 · high 11.17 · high 20.60 · good poor
Tue 22:00 1.26 · high 11.37 · high 20.60 · good poor
Tue 23:00 1.26 · high 11.32 · high 20.60 · good poor
Wed 00:00 1.24 · high 11.06 · high 20.60 · good poor
Wed 01:00 1.24 · high 11.41 · high 20.60 · good poor
Wed 02:00 1.22 · high 10.97 · high 20.60 · good poor
Wed 03:00 1.22 · high 10.67 · high 20.70 · good poor
Wed 04:00 1.22 · high 10.33 · high 20.70 · good poor
Wed 05:00 1.20 · high 10.36 · high 20.80 · good poor
Wed 06:00 1.20 · high 10.61 · high 20.80 · good poor
Wed 07:00 1.22 · high 10.17 · high 20.80 · good poor
Wed 08:00 1.26 · high 10.68 · high 20.80 · good poor
Wed 09:00 1.28 · high 11.54 · high 20.70 · good poor