Rivers Water Temperature in New South Wales

This section covers water temperature data for Rivers in New South Wales.

Parramatta River © By Timothy M Roberts, CC BY-SA 2.0

Rivers of New South Wales: Water Temperature and Swimming Conditions

Rivers across New South Wales provide important freshwater swimming locations, particularly away from the coast. Water temperature in rivers is influenced by air temperature, rainfall, flow rate, and shading, resulting in clear seasonal patterns. These factors determine when rivers are comfortable and safe for swimming.

During summer, river water temperatures in much of New South Wales commonly range from 22–28°C. These warm conditions make rivers popular swimming spots during periods of high heat, offering a refreshing alternative to the ocean. Slower-flowing sections and deeper pools often provide the most comfortable swimming conditions, especially during prolonged hot weather.

In autumn, river temperatures gradually cool, usually settling around 18–22°C. Swimming remains common early in the season, particularly on warm days, but becomes less frequent as air temperatures fall. In winter, water temperatures in many rivers drop to around 10–14°C, creating cold conditions that limit swimming mostly to short immersions or experienced cold-water swimmers.

Spring brings a gradual warming of river water, with temperatures typically rising back to around 16–20°C. These conditions support a return to recreational swimming, especially in sheltered sections that warm more quickly in the sun. Water levels and flow conditions during spring can also affect suitability for swimming.

Overall, rivers in New South Wales offer seasonal swimming opportunities that are closely tied to water temperature and river conditions. Summer provides the most comfortable and reliable swimming, while cooler months appeal mainly to swimmers prepared for brisk freshwater temperatures.