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 02:58

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

Clear

12% 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 (35 hours)
  • Tide/current (28 hours)
  • Darkness (23 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: 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

Wed 16:00 – Sat 16:00 (AEST)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.53 around Thu 16:00; 8 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 0.44m to 0.52m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 6.0 to 17.1m/s).

Tides range from -0.56m to 1.71m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
fair ⚠️ Fair
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
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
fair ⚠️ Fair
fair ⚠️ Fair
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
fair ⚠️ Fair
fair ⚠️ Fair
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
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
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
poor ❌ Limited
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 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
Wed 20:00 0.52 · high 17.10 · high 21.90 · good poor
Wed 21:00 0.52 · high 15.60 · high 21.90 · good poor
Wed 22:00 0.52 · high 14.20 · high 21.90 · good poor
Wed 23:00 0.50 · high 13.90 · high 21.90 · good poor
Thu 00:00 0.50 · high 12.40 · high 22.00 · good fair
Thu 01:00 0.50 · high 9.50 · high 22.00 · good fair
Thu 02:00 0.48 · high 7.00 · high 22.10 · good fair
Thu 03:00 0.48 · high 6.00 · high 22.20 · good fair
Thu 04:00 0.48 · high 6.60 · high 22.30 · good fair
Thu 05:00 0.46 · high 7.30 · high 22.30 · good fair
Thu 06:00 0.46 · high 6.90 · high 22.40 · good fair
Thu 07:00 0.46 · high 8.40 · high 22.40 · good fair
Thu 08:00 0.46 · high 12.80 · high 22.30 · good poor
Thu 09:00 0.46 · high 14.40 · high 22.30 · good poor
Thu 10:00 0.46 · high 15.50 · high 22.30 · good poor
Thu 11:00 0.44 · high 15.40 · high 22.20 · good poor
Thu 12:00 0.44 · high 14.10 · high 22.20 · good poor
Thu 13:00 0.44 · high 13.60 · high 22.20 · good poor
Thu 14:00 0.46 · high 12.40 · high 22.10 · good poor
Thu 15:00 0.46 · high 10.80 · high 22.10 · good poor
Thu 16:00 0.46 · high 9.20 · high 22.10 · good poor
Thu 17:00 0.46 · high 7.50 · high 22.10 · good poor
Thu 18:00 0.46 · high 5.10 · good 22.10 · good poor
Thu 19:00 0.46 · high 2.90 · good 22.10 · good poor
Thu 20:00 0.46 · high 1.80 · good 22.10 · good poor
Thu 21:00 0.46 · high 2.70 · good 22.10 · good poor
Thu 22:00 0.46 · high 4.00 · good 22.10 · good poor
Thu 23:00 0.44 · high 8.80 · high 22.10 · good poor
Fri 00:00 0.44 · high 14.30 · high 22.10 · good fair
Fri 01:00 0.44 · high 14.70 · high 22.20 · good fair
Fri 02:00 0.44 · high 12.50 · high 22.20 · good poor
Fri 03:00 0.44 · high 12.90 · high 22.30 · good poor
Fri 04:00 0.44 · high 12.10 · high 22.40 · good poor
Fri 05:00 0.44 · high 11.70 · high 22.40 · good poor
Fri 06:00 0.44 · high 8.30 · high 22.40 · good fair
Fri 07:00 0.44 · high 6.40 · high 22.40 · good fair
Fri 08:00 0.44 · high 7.80 · high 22.40 · good poor
Fri 09:00 0.44 · high 8.10 · high 22.30 · good poor
Fri 10:00 0.44 · high 10.80 · high 22.30 · good poor
Fri 11:00 0.46 · high 6.30 · high 22.20 · good poor
Fri 12:00 0.46 · high 8.10 · high 22.20 · good poor
Fri 13:00 0.46 · high 7.80 · high 22.20 · good poor
Fri 14:00 0.46 · high 6.10 · high 22.10 · good poor
Fri 15:00 0.46 · high 4.50 · good 22.10 · good poor
Fri 16:00 0.46 · high 11.00 · high 22.10 · good poor
Fri 17:00 0.44 · high 14.80 · high 22.10 · good poor
Fri 18:00 0.44 · high 16.50 · high 22.10 · good poor
Fri 19:00 0.48 · high 21.10 · high 22.10 · good poor
Fri 20:00 0.52 · high 30.60 · high 22.00 · good poor
Fri 21:00 0.56 · high 33.30 · high 22.00 · good poor
Fri 22:00 0.62 · high 33.60 · high 22.00 · good poor
Fri 23:00 0.66 · high 32.00 · high 22.00 · good poor
Sat 00:00 0.72 · high 30.30 · high 22.00 · good poor
Sat 01:00 0.72 · high 29.40 · high 22.00 · good poor
Sat 02:00 0.72 · high 28.00 · high 22.00 · good poor
Sat 03:00 0.72 · high 27.50 · high 22.10 · good poor
Sat 04:00 0.74 · high 28.40 · high 22.10 · good poor
Sat 05:00 0.76 · high 28.70 · high 22.10 · good poor
Sat 06:00 0.78 · high 28.20 · high 22.10 · good poor
Sat 07:00 0.78 · high 27.10 · high 22.10 · good poor
Sat 08:00 0.76 · high 26.80 · high 22.10 · good poor
Sat 09:00 0.76 · high 27.50 · high 22.10 · good poor
Sat 10:00 0.78 · high 29.60 · high 22.00 · good poor
Sat 11:00 0.80 · high 29.40 · high 22.00 · good poor
Sat 12:00 0.82 · high 31.10 · high 22.00 · good poor
Sat 13:00 0.82 · high 30.60 · high 21.90 · good poor
Sat 14:00 0.84 · high 31.30 · high 21.90 · good poor
Sat 15:00 0.84 · high 34.40 · high 21.90 · good poor