South Coast – Water Temperature Overview

This page provides information on South Coast Area locations where sea water temperature data is available, including current conditions, monthly ranges and historical records.

Current Water Temperature

21.2°C

minimum

21.6°C

average

22.3°C

maximum

The current water temperature in the South Coast today is within the range of 21-22°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

Water Temperature Over the Last 60 Days

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	18°C	22°C	25°C
February	21°C	24°C	26°C
March	20°C	23°C	25°C
April	19°C	22°C	25°C
May	16°C	20°C	24°C
June	15°C	19°C	23°C
July	14°C	18°C	21°C
August	14°C	17°C	20°C
September	15°C	18°C	20°C
October	15°C	18°C	21°C
November	17°C	20°C	22°C
December	17°C	21°C	25°C

The South Coast of New South Wales extends from the southern edge of Sydney down toward the Victorian border, with sea water temperatures shaped by the Tasman Sea and cooler southern influences. Compared with northern NSW, this region experiences more noticeable seasonal variation. In summer, sea water temperatures typically range from about 20°C to 23°C, offering generally comfortable conditions for swimming. Autumn often remains mild, with temperatures around 18–21°C before cooling further in winter. During winter, sea water temperatures usually sit between 15°C and 17°C, which can feel cold on entry and limit time in the water for many swimmers. Spring brings a gradual increase, with temperatures rising back toward 18–21°C as summer approaches.

Swimming Conditions

Swimming is allowed and popular along the South Coast, especially during the warmer months when water temperatures are more comfortable. Summer and early autumn are the best times for swimming, with calmer conditions and water warm enough for extended swims at beaches and in sheltered bays. In winter, swimming still takes place, particularly among locals, surfers and open-water swimmers, though many people choose shorter sessions or wear wetsuits for warmth. The region is known for clear water, sandy beaches and protected bays, which can offer safer swimming options when conditions are suitable. Overall, the South Coast provides enjoyable swimming opportunities for much of the year, with the most comfortable experiences occurring during the warmer seasons when sea temperatures are at their highest.