St Georges Basin – current water temperature and swimming conditions
This page provides information about the current water temperature at St Georges Basin in New South Wales. Here you can view recent temperature trends on a 30-day chart, check typical monthly water temperature ranges, and compare today’s reading with historical averages for this date. A 7-day water temperature forecast, local weather conditions, and an overview of swimming suitability are also included.
Current Water Temperature
The water temperature in St Georges Basin today is 13°C.
Water Temperature in St Georges Basin: Daily Trends, Historical Records, and Forecast
⚠️ Lake temperatures between 10 and 15°C are cold but can be manageable for short swims on sunny, warm days. Shallow areas may feel slightly warmer, while deeper sections remain cold and slow to warm up. Most swimmers keep sessions brief, and wetsuits are often used for comfort. Wind and cooler air temperatures can quickly reduce how pleasant the swim feels.
Water Temperature Over the Last 30 Days
Water temperatures in St Georges Basin have been on a steady rise over the past month and have continued to climb over the last week.
According to our forecast, the water temperature in St Georges Basin will be 12.2°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Water Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Aug 15 | 12.3°C | 12.0°C | |
| Aug 16 | 12.5°C | 12.0°C | |
| Aug 17 | 12.2°C | 12.0°C | |
| Aug 18 | 12.2°C | 12.0°C | |
| Aug 19 | 12.2°C | 12.0°C | |
| Aug 20 | 12.3°C | 12.0°C | |
| Aug 21 | 12.9°C | 12.0°C | |
| Aug 22 | 13.1°C | 12.0°C | |
| Aug 23 | 13.2°C | 12.0°C | 13.2°C |
| Aug 24 | 12.0°C | 13.1°C | |
| Aug 25 | 12.0°C | 12.9°C | |
| Aug 26 | 12.0°C | 12.8°C | |
| Aug 27 | 12.0°C | 12.6°C | |
| Aug 28 | 12.0°C | 12.5°C | |
| Aug 29 | 12.0°C | 12.3°C | |
| Aug 30 | 12.0°C | 12.2°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual lake water temperatures may differ from the reported values by several degrees, particularly during periods of strong winds or rapid weather changes. Wind can mix surface and deeper layers in a lake, bringing cooler water to the surface, while shallow areas may warm more quickly under direct sunlight. Air temperature, sunshine, and cloud cover strongly influence how quickly a lake heats up or cools down. These factors can lead to noticeable temperature variations across different parts of the lake.
Our forecast is based on a proprietary mathematical model that considers real-time lake temperature observations, historical trends, seasonal cycles, wind strength and direction, and region-specific air temperature. To enhance accuracy, we also incorporate data from nearby monitored locations and comparable lakes within Australia.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 20°C | 24°C | 27°C |
| February | 19°C | 23°C | 28°C |
| March | 17°C | 21°C | 25°C |
| April | 14°C | 19°C | 22°C |
| May | 11°C | 15°C | 20°C |
| June | 9°C | 13°C | 16°C |
| July | 8°C | 11°C | 13°C |
| August | 10°C | 12°C | 14°C |
| September | 12°C | 15°C | 18°C |
| October | 15°C | 18°C | 22°C |
| November | 18°C | 20°C | 24°C |
| December | 20°C | 23°C | 26°C |
St Georges Basin: Water Temperature by Location
Erowal Bay
Wrights Beach
Paradise Beach Reserve
Location & Local Information
St Georges Basin is a large, sheltered coastal lagoon on the NSW South Coast, separated from the ocean and influenced mainly by local weather and seasonal conditions. Water temperatures here are generally moderate and stable through the year. In summer, the basin usually warms to around 22–26°C, which feels comfortably warm and ideal for swimming. Spring and autumn tend to sit between 18–22°C, remaining pleasant on clear days with light winds. During winter, water temperatures commonly drop to about 15–18°C, cool but still milder than many inland lakes and rivers further south.
Swimming Conditions
Swimming in St Georges Basin is allowed and widely enjoyed, especially during the warmer months. The water is typically calm, with minimal current and no wave action, making it well suited to relaxed swimming and paddling. Shallow shorelines and sandy edges provide easy access, which is popular with families and casual swimmers. Water quality is generally good in dry, settled weather, though it can be affected briefly after heavy rain when runoff reduces clarity and slightly cools the water. At those times, locals often wait for conditions to settle before swimming again. Overall, St Georges Basin offers reliable and comfortable swimming conditions, combining moderate water temperatures with a quiet, sheltered environment away from the open coast.