Green Island Sea Temperature
Updated Wed 11:46 (Australia/Brisbane)
Australia · Forecast updated Aug 12, 2026, 11:46 UTC
Current Sea Temperature
23.2°C
73.8°F
Mild water
Versus this month's average
Close to average
The August average in our archive is 23.1°C (73.6°F).
Recent trend
At least two weeks of records are needed before showing a reliable trend.
What to wear
Mild water
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions.
Sea Surface Temperature Over the Year
In the data collected for Green Island, monthly averages range from about 23.1°C (73.6°F) in August to 23.1°C (73.6°F) in August.
Over the past 30 days, the average sea temperature in Green Island has been 23.1°C.
Monthly Water Temperature Averages
Southern Hemisphere. Summer is generally December–February; winter is June–August.
| Month | Min | Average | Max |
|---|---|---|---|
| August | 22.9°C / 73.2°F | 23.1°C / 73.6°F | 23.5°C / 74.3°F |
Profile calculated from 92 hourly forecast records across 1 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Green Island
Cairns coral cay with shallow reef, turtles and easy lagoon snorkeling.
- Area
- Queensland
Green Island Water Temperature: Common Questions
What is the sea temperature in Green Island today?
The current sea surface temperature in Green Island is 23.2°C. Over the last 30 days, the average has been 23.1°C.
When is the water warmest in Green Island?
The warmest monthly average in the Green Island archive is August, at around 23.1°C (73.6°F).
When is the water coldest in Green Island?
The coldest monthly average in the archive is August, at around 23.1°C (73.6°F).
Can you swim in Green Island today?
At 23.2°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Green Island.
View Snorkel Forecast →