Adelaide Region – Water Temperature Overview

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

Current Water Temperature

18.8°C

minimum

20.4°C

average

21.2°C

maximum

The current water temperature in the Adelaide Region today is within the range of 19-21°C. Thus, the average water temperature is about 20°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	17°C	20°C	23°C
February	18°C	21°C	23°C
March	17°C	20°C	23°C
April	16°C	19°C	22°C
May	14°C	17°C	20°C
June	13°C	15°C	17°C
July	11°C	14°C	16°C
August	11°C	13°C	15°C
September	11°C	14°C	16°C
October	12°C	15°C	18°C
November	14°C	17°C	20°C
December	16°C	19°C	21°C

The Adelaide coastline lies along the eastern side of Gulf St Vincent, where relatively sheltered waters create milder sea conditions than the open Southern Ocean. Sea water temperatures here show clear seasonal changes but are generally moderate by southern Australian standards. In summer, water temperatures typically range from about 19°C to 22°C, offering comfortable conditions for swimming on warm days. Autumn often remains pleasant, with sea temperatures around 17–20°C before cooling further through winter. During winter, water temperatures usually sit between 14°C and 16°C, which can feel cold on entry and limit how long most people stay in the water. Spring brings a gradual warming trend, with temperatures rising back toward 17–19°C as summer approaches.

Swimming Conditions

Swimming is allowed and popular along Adelaide’s metropolitan beaches, particularly because conditions are usually calmer than along more exposed coastlines. Summer is the main swimming season, when warmer water and air temperatures combine to create enjoyable conditions for families and casual swimmers. Many beaches have gentle slopes and fewer strong currents, making them well suited to relaxed swimming and wading. In winter, swimming continues mainly among locals and regular ocean swimmers, though most people prefer shorter dips or wear wetsuits due to cooler water. The sheltered nature of the gulf, combined with good water quality and accessible beaches, supports swimming for much of the year, with the most comfortable experiences occurring during the warmer months when sea temperatures are at their highest.