Month-specific sea-surface temperature · Australia
Green Island Sea Temperature in August
23.5°C
74.3°F
In August, sea-surface temperature near Green Island has a historical monthly average of 23.5°C. This is not the reading for any particular holiday date.
Across 2023–2025, the lowest and highest yearly August monthly means were 23.1–24.1°C. These are not daily extremes.
Previous month
July · 23.9°C
Change into August: -0.4°C
Next month
September · 24.6°C
Change into next month: +1.1°C
Can you swim or snorkel in Green Island in August?
At 23.5°C our temperature-only guide describes the water as mild water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.
Do you need a wetsuit?
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Which beach should you choose?
Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.
Check the current waves, wind and snorkeling forecast →
A live forecast does not predict a future August. Check again close to your trip.
Nearby places in August
Comparable historical averages from independent marine grid cells. Warmer water does not imply safe snorkeling.
- Arlington Reef 23.7°C
- Michaelmas Cay 23.6°C
- Fitzroy Island 23.6°C
- Hastings Reef 24.1°C
- Cairns 23.6°C
- Moore Reef 24.5°C
Data source and limitations
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2023–2025. Marine model grid near -16.76, 145.97. Based on 3 yearly monthly means and 2232 recorded samples. Source methodology.
Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.