# Heron Island snorkeling forecast

Heron Island looks marginal today. The least-bad daylight window is around Sat 15:00, but waves is limiting the forecast.

- Location: Heron Island, Australia
- Timezone: Australia/Brisbane
- Valid period: next 72 hours from 2026-10-17T12:35:39.201101+10:00
- Verdict: Marginal
- Score: 2.4/10
- Share of next 72h scored OK: 0%
- Source: snapshot
- Generated at: 2026-10-17T11:01:45.585669+10:00
- Conditions can change. HTML page: https://snorkelforecast.com/australia/heron-island/
- Forecast JSON: https://snorkelforecast.com/australia/heron-island/forecast.json
- Sea temperature: https://snorkelforecast.com/australia/heron-island/sea-temperature/
- Sea temperature markdown: https://snorkelforecast.com/australia/heron-island/sea-temperature.md
- History JSON: https://snorkelforecast.com/australia/heron-island/history.json
- Embed widget: https://snorkelforecast.com/australia/heron-island/embed/sea-temperature/
- Current sea temperature: 23.2 °C (73.8 °F)
- Baseline normal for month 10: 24.1 °C (75.4 °F) from 3 sample years
- Sea temperature versus month 10 normal: -0.9 °C (-1.6 °F), cooler than the stored baseline
- Scoring thresholds: waves <= 0.36 m, wind <= 5.4 m/s, current <= 0.36 m/s, water 20.6-30.4 °C. Forecast thresholds, not official safety limits.

## Next 24 hours

| time | rating | score | ok | waves_m | wind_mps | sst_c |
| --- | --- | --- | --- | --- | --- | --- |
| 2026-10-17T13:00:00+10:00 | poor | 0.21291851851851853 | no | 1.06 | 9.46 | 23.2 |
| 2026-10-17T14:00:00+10:00 | poor | 0.22138518518518524 | no | 1.1 | 9.82 | 23.2 |
| 2026-10-17T15:00:00+10:00 | poor | 0.23564074074074076 | no | 1.12 | 10.39 | 23.2 |
| 2026-10-17T16:00:00+10:00 | poor | 0.22615000000000002 | no | 1.16 | 11.0 | 23.2 |
| 2026-10-17T17:00:00+10:00 | poor | 0.23532407407407407 | no | 1.18 | 10.3 | 23.2 |
| 2026-10-17T18:00:00+10:00 | poor | 0.0 | no | 1.2 | 11.0 | 23.2 |
| 2026-10-17T19:00:00+10:00 | poor | 0.0 | no | 1.22 | 10.73 | 23.1 |
| 2026-10-17T20:00:00+10:00 | poor | 0.0 | no | 1.24 | 10.63 | 23.1 |
| 2026-10-17T21:00:00+10:00 | poor | 0.0 | no | 1.28 | 11.07 | 23.1 |
| 2026-10-17T22:00:00+10:00 | poor | 0.0 | no | 1.3 | 11.07 | 23.0 |
| 2026-10-17T23:00:00+10:00 | poor | 0.0 | no | 1.28 | 10.74 | 23.0 |
| 2026-10-18T00:00:00+10:00 | poor | 0.0 | no | 1.26 | 10.29 | 23.0 |
| 2026-10-18T01:00:00+10:00 | poor | 0.0 | no | 1.24 | 10.1 | 22.9 |
| 2026-10-18T02:00:00+10:00 | poor | 0.0 | no | 1.22 | 9.99 | 22.9 |
| 2026-10-18T03:00:00+10:00 | poor | 0.0 | no | 1.2 | 9.32 | 22.8 |
| 2026-10-18T04:00:00+10:00 | poor | 0.0 | no | 1.18 | 9.6 | 22.8 |
| 2026-10-18T05:00:00+10:00 | poor | 0.0 | no | 1.16 | 9.89 | 22.8 |
| 2026-10-18T06:00:00+10:00 | poor | 0.0 | no | 1.14 | 9.59 | 22.8 |
| 2026-10-18T07:00:00+10:00 | poor | 0.0 | no | 1.12 | 9.25 | 22.8 |
| 2026-10-18T08:00:00+10:00 | poor | 0.0 | no | 1.12 | 9.07 | 22.8 |
| 2026-10-18T09:00:00+10:00 | poor | 0.0 | no | 1.1 | 9.52 | 22.8 |
| 2026-10-18T10:00:00+10:00 | poor | 0.2160314814814815 | no | 1.1 | 9.17 | 22.8 |
| 2026-10-18T11:00:00+10:00 | poor | 0.2337574074074074 | no | 1.1 | 9.13 | 22.9 |
| 2026-10-18T12:00:00+10:00 | poor | 0.2902796296296296 | no | 1.08 | 8.71 | 22.9 |

## Nearby spots

- [Agincourt Reef](https://snorkelforecast.com/australia/agincourt-reef/index.md)
- [Arlington Reef](https://snorkelforecast.com/australia/arlington-reef/index.md)
- [Byron Bay](https://snorkelforecast.com/australia/byron-bay/index.md)
- [Cairns](https://snorkelforecast.com/australia/cairns/index.md)