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 15:40

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

Score: 4.4/10

Best time: Thu 17:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Wed 17:00 (Fair). Peak afternoon wind is about 7.5 m/s.

Email me when it is good

Sunrise

06:31

Sunset

17:25

Water

20.9°C

Max air

21.0°C

Sky

Partly cloudy

32% 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

⚠️ fair 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 (46 hours)
  • Tide/current (34 hours)
  • Wind (32 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

⚠️ Fair

Whitsundays

462 km away

⚠️ Fair

Byron Bay

603 km away

⚠️ Fair

Lord Howe Island

1145 km away

❌ Poor

Advanced forecast data

Viewing historical data

Wed 05:00 – Sat 05:00 (AEST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.31 around Thu 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 1.02m to 1.3m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 8.63 to 12.46m/s).

Tides range from -0.42m to 1.22m; 1 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 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
Wed 10:00 1.28 · high 12.15 · high 20.70 · good poor
Wed 11:00 1.30 · high 12.08 · high 20.70 · good poor
Wed 12:00 1.30 · high 12.46 · high 20.60 · good poor
Wed 13:00 1.28 · high 11.88 · high 20.60 · good poor
Wed 14:00 1.26 · high 10.97 · high 20.60 · good poor
Wed 15:00 1.24 · high 10.38 · high 20.50 · out of range poor
Wed 16:00 1.22 · high 10.16 · high 20.50 · out of range poor
Wed 17:00 1.22 · high 10.05 · high 20.50 · out of range poor
Wed 18:00 1.20 · high 10.22 · high 20.50 · out of range poor
Wed 19:00 1.18 · high 9.37 · high 20.50 · out of range poor
Wed 20:00 1.18 · high 10.94 · high 20.50 · out of range poor
Wed 21:00 1.16 · high 11.36 · high 20.50 · out of range poor
Wed 22:00 1.14 · high 11.04 · high 20.50 · out of range poor
Wed 23:00 1.12 · high 11.09 · high 20.50 · out of range poor
Thu 00:00 1.10 · high 10.53 · high 20.50 · out of range poor
Thu 01:00 1.08 · high 9.92 · high 20.50 · out of range poor
Thu 02:00 1.06 · high 9.85 · high 20.60 · good poor
Thu 03:00 1.04 · high 9.17 · high 20.60 · good poor
Thu 04:00 1.02 · high 8.63 · high 20.70 · good poor
Thu 05:00 1.00 · high 8.50 · high 20.70 · good poor
Thu 06:00 0.98 · high 8.56 · high 20.70 · good poor
Thu 07:00 0.98 · high 9.05 · high 20.70 · good poor
Thu 08:00 1.00 · high 9.03 · high 20.70 · good poor
Thu 09:00 0.92 · high 7.78 · high 20.80 · good poor
Thu 10:00 0.92 · high 7.74 · high 20.70 · good poor
Thu 11:00 0.90 · high 8.60 · high 20.70 · good poor
Thu 12:00 0.90 · high 8.16 · high 20.70 · good poor
Thu 13:00 0.90 · high 8.05 · high 20.70 · good poor
Thu 14:00 0.88 · high 7.81 · high 20.60 · good poor
Thu 15:00 0.88 · high 7.96 · high 20.60 · good poor
Thu 16:00 0.88 · high 7.88 · high 20.60 · good poor
Thu 17:00 0.88 · high 7.25 · high 20.50 · out of range poor
Thu 18:00 0.88 · high 7.23 · high 20.50 · out of range poor
Thu 19:00 0.88 · high 7.63 · high 20.50 · out of range poor
Thu 20:00 0.88 · high 7.85 · high 20.50 · out of range poor
Thu 21:00 0.88 · high 7.36 · high 20.50 · out of range poor
Thu 22:00 0.86 · high 7.47 · high 20.50 · out of range poor
Thu 23:00 0.86 · high 7.16 · high 20.50 · out of range poor
Fri 00:00 0.84 · high 6.95 · high 20.50 · out of range poor
Fri 01:00 0.82 · high 6.73 · high 20.50 · out of range poor
Fri 02:00 0.82 · high 6.37 · high 20.50 · out of range poor
Fri 03:00 0.80 · high 6.50 · high 20.60 · good poor
Fri 04:00 0.78 · high 6.33 · high 20.60 · good poor
Fri 05:00 0.74 · high 7.50 · high 20.60 · good poor
Fri 06:00 0.72 · high 8.95 · high 20.60 · good poor
Fri 07:00 0.70 · high 8.79 · high 20.60 · good poor
Fri 08:00 0.68 · high 8.32 · high 20.60 · good poor
Fri 09:00 0.66 · high 7.95 · high 20.60 · good poor
Fri 10:00 0.66 · high 7.88 · high 20.60 · good poor
Fri 11:00 0.64 · high 7.72 · high 20.60 · good poor
Fri 12:00 0.64 · high 7.74 · high 20.60 · good poor
Fri 13:00 0.64 · high 7.47 · high 20.60 · good poor
Fri 14:00 0.64 · high 7.06 · high 20.50 · out of range poor
Fri 15:00 0.64 · high 6.73 · high 20.50 · out of range poor
Fri 16:00 0.62 · high 6.16 · high 20.50 · out of range poor
Fri 17:00 0.60 · high 5.79 · high 20.50 · out of range poor
Fri 18:00 0.58 · high 5.67 · high 20.50 · out of range poor
Fri 19:00 0.56 · high 5.45 · high 20.50 · out of range poor
Fri 20:00 0.54 · high 5.07 · good 20.50 · out of range poor
Fri 21:00 0.52 · high 4.74 · good 20.50 · out of range poor
Fri 22:00 0.50 · high 4.69 · good 20.50 · out of range poor
Fri 23:00 0.50 · high 5.01 · good 20.50 · out of range poor
Sat 00:00 0.48 · high 5.17 · good 20.50 · out of range fair
Sat 01:00 0.46 · high 5.21 · good 20.60 · good fair
Sat 02:00 0.46 · high 5.29 · good 20.60 · good fair
Sat 03:00 0.44 · high 4.99 · good 20.70 · good fair
Sat 04:00 0.42 · high 4.55 · good 20.70 · good fair