Sydney South Coast – Water Temperature Overview
This page provides information on Sydney South Coast locations where sea water temperature data is available, including current conditions, monthly ranges and historical records.
Current Water Temperature
The current water temperature in the Sydney South Coast today is within the range of 22-23°C. Thus, the average water temperature is about 22°C. This water feels mild to warm and is comfortable for the majority of swimmers. Swimming is enjoyable, though longer stays may feel cooler for some people, especially in windy conditions. These temperatures are well suited to family outings and active swimming, particularly on warm days.
It’s important to note that these swimming tips and recommendations apply only in settled weather. When air temperatures drop below 20°C — and sometimes even below 25°C — swimming can feel uncomfortable, even when water temperatures are relatively high.
Sea Temperature Trends
Over the past month, the sea water temperature has remained largely unchanged. Overall, the sea water temperature is within the range expected based on historical data for this month.
Water Temperature and Swimming Conditions by Month
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 20°C | 23°C | 25°C |
| February | 22°C | 25°C | 27°C |
| March | 20°C | 23°C | 26°C |
| April | 19°C | 22°C | 25°C |
| May | 16°C | 20°C | 24°C |
| June | 15°C | 19°C | 23°C |
| July | 15°C | 18°C | 21°C |
| August | 15°C | 18°C | 20°C |
| September | 16°C | 18°C | 20°C |
| October | 16°C | 19°C | 22°C |
| November | 17°C | 20°C | 22°C |
| December | 18°C | 22°C | 25°C |
The Sydney South Coast, extending from the Royal National Park down through the Illawarra and Shoalhaven regions, offers a spectacular array of swimming environments. The ocean temperatures here are influenced by the temperate climate, remaining relatively mild for most of the year. During the summer peak in February, sea water temperatures generally range from 22°C to 24°C, providing a refreshing escape from the heat. In the winter months, particularly around August, the temperature typically settles between 17°C and 19°C. While these conditions are cooler than the state’s northern reaches, they remain popular for active swimmers and surfers, many of whom opt for a standard 3/2mm wetsuit to extend their time in the water during the shoulder seasons.
Swimming Conditions
Swimming is permitted and widely enjoyed at the region's vast selection of surf beaches, calm bays, and iconic ocean pools. For safety reasons, it is strongly advised to only swim at patrolled locations such as North Wollongong, Austinmer, or Mollymook, where surf lifesavers monitor the conditions. These areas are prone to strong rip currents and sudden changes in swell, making the red and yellow flags the only reliable indicator of a safe entry point. Additionally, water quality is a key consideration for health; authorities recommend avoiding swimming for at least twenty-four hours after heavy rain at ocean beaches, and up to three days in estuaries or lagoons. This precaution is necessary due to the risk of stormwater runoff, which can temporarily impact the cleanliness of the water.