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 Thu 06:30

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

Best morning signal: Thu 10:00 (Fair).

Best afternoon signal: Thu 17:00 (Good). Peak afternoon wind is about 6.6 m/s.

Email me when it is good

Sunrise

06:31

Sunset

17:25

Water

20.8°C

Max air

20.6°C

Sky

Partly cloudy

48% cloud

Good window is available today

Next safe window: Thu 07:00 (3% of next 72h are suitable)

3-day planner Best available Show data

3-day planner

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 (31 hours)
  • Tide/current (26 hours)
  • Darkness (19 hours)

Jellyfish drift risk

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

Low · 26/100

Low peak drift risk around Thu 11:00.

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: Thu 18:00

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 20:00 – Wed 20:00 (AEST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.21 around Mon 17:00; 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 0.92m to 1.06m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 25.6 to 35.5m/s).

Tides range from -0.49m to 1.78m; 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 20:00 1.06 · high 34.70 · high 21.40 · good poor
Sun 21:00 1.06 · high 35.40 · high 21.40 · good poor
Sun 22:00 1.04 · high 35.50 · high 21.40 · good poor
Sun 23:00 1.04 · high 35.00 · high 21.40 · good poor
Mon 00:00 1.02 · high 33.30 · high 21.40 · good poor
Mon 01:00 0.98 · high 33.00 · high 21.40 · good poor
Mon 02:00 0.96 · high 26.80 · high 21.40 · good poor
Mon 03:00 0.92 · high 25.60 · high 21.50 · good poor
Mon 04:00 0.94 · high 27.90 · high 21.50 · good poor
Mon 05:00 0.94 · high 30.10 · high 21.60 · good poor
Mon 06:00 0.96 · high 30.10 · high 21.60 · good poor
Mon 07:00 0.98 · high 32.00 · high 21.60 · good poor
Mon 08:00 1.00 · high 32.80 · high 21.60 · good poor
Mon 09:00 1.02 · high 33.90 · high 21.60 · good poor
Mon 10:00 1.02 · high 34.10 · high 21.60 · good poor
Mon 11:00 1.00 · high 33.60 · high 21.50 · good poor
Mon 12:00 1.00 · high 33.00 · high 21.50 · good poor
Mon 13:00 1.02 · high 32.40 · high 21.50 · good poor
Mon 14:00 1.02 · high 33.00 · high 21.50 · good poor
Mon 15:00 1.04 · high 34.10 · high 21.50 · good poor
Mon 16:00 1.02 · high 32.30 · high 21.50 · good poor
Mon 17:00 1.00 · high 31.70 · high 21.50 · good poor
Mon 18:00 0.98 · high 30.30 · high 21.50 · good poor
Mon 19:00 0.96 · high 31.80 · high 21.50 · good poor
Mon 20:00 0.96 · high 31.40 · high 21.50 · good poor
Mon 21:00 0.94 · high 29.00 · high 21.50 · good poor
Mon 22:00 0.90 · high 26.80 · high 21.50 · good poor
Mon 23:00 0.84 · high 25.60 · high 21.50 · good poor
Tue 00:00 0.80 · high 25.20 · high 21.50 · good poor
Tue 01:00 0.78 · high 24.80 · high 21.60 · good poor
Tue 02:00 0.78 · high 26.70 · high 21.60 · good poor
Tue 03:00 0.76 · high 23.80 · high 21.70 · good poor
Tue 04:00 0.74 · high 22.70 · high 21.70 · good poor
Tue 05:00 0.72 · high 20.20 · high 21.80 · good poor
Tue 06:00 0.70 · high 18.80 · high 21.80 · good poor
Tue 07:00 0.68 · high 20.90 · high 21.80 · good poor
Tue 08:00 0.68 · high 22.30 · high 21.80 · good poor
Tue 09:00 0.66 · high 21.10 · high 21.80 · good poor
Tue 10:00 0.66 · high 19.90 · high 21.80 · good poor
Tue 11:00 0.64 · high 19.50 · high 21.80 · good poor
Tue 12:00 0.58 · high 16.10 · high 21.70 · good poor
Tue 13:00 0.58 · high 14.40 · high 21.70 · good poor
Tue 14:00 0.56 · high 13.90 · high 21.70 · good poor
Tue 15:00 0.56 · high 14.40 · high 21.70 · good poor
Tue 16:00 0.54 · high 15.00 · high 21.70 · good poor
Tue 17:00 0.54 · high 15.30 · high 21.70 · good poor
Tue 18:00 0.52 · high 15.70 · high 21.70 · good poor
Tue 19:00 0.52 · high 19.20 · high 21.70 · good poor
Tue 20:00 0.54 · high 19.90 · high 21.70 · good poor
Tue 21:00 0.54 · high 21.50 · high 21.70 · good poor
Tue 22:00 0.56 · high 22.30 · high 21.70 · good poor
Tue 23:00 0.56 · high 22.80 · high 21.80 · good poor
Wed 00:00 0.58 · high 22.90 · high 21.80 · good fair
Wed 01:00 0.58 · high 22.40 · high 21.80 · good poor
Wed 02:00 0.58 · high 21.40 · high 21.90 · good poor
Wed 03:00 0.58 · high 20.20 · high 21.90 · good poor
Wed 04:00 0.58 · high 17.70 · high 22.00 · good poor
Wed 05:00 0.56 · high 16.00 · high 22.00 · good poor
Wed 06:00 0.56 · high 15.20 · high 22.00 · good poor
Wed 07:00 0.54 · high 14.10 · high 22.00 · good poor
Wed 08:00 0.54 · high 11.60 · high 22.00 · good poor
Wed 09:00 0.52 · high 12.00 · high 22.00 · good poor
Wed 10:00 0.52 · high 14.70 · high 22.00 · good poor
Wed 11:00 0.52 · high 16.20 · high 22.00 · good poor
Wed 12:00 0.52 · high 18.10 · high 22.00 · good poor
Wed 13:00 0.52 · high 18.70 · high 22.00 · good poor
Wed 14:00 0.52 · high 19.00 · high 22.00 · good poor
Wed 15:00 0.52 · high 17.90 · high 21.90 · good poor
Wed 16:00 0.52 · high 16.90 · high 21.90 · good poor
Wed 17:00 0.52 · high 16.00 · high 21.90 · good poor
Wed 18:00 0.52 · high 16.80 · high 21.90 · good poor
Wed 19:00 0.52 · high 17.10 · high 21.90 · good poor