Margaret River Region – Water Temperature Overview

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

Current Water Temperature

20.4°C

minimum

20.6°C

average

20.7°C

maximum

The current water temperature in the Margaret River Region today is within the range of 20-21°C. Thus, the average water temperature is about 21°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	21°C	23°C
February	19°C	22°C	24°C
March	19°C	22°C	25°C
April	18°C	21°C	24°C
May	19°C	22°C	24°C
June	17°C	20°C	22°C
July	16°C	19°C	21°C
August	17°C	19°C	20°C
September	16°C	18°C	20°C
October	16°C	18°C	20°C
November	16°C	19°C	21°C
December	17°C	20°C	23°C

The Margaret River region lies along a rugged stretch of Western Australia’s south-west coast, where the Indian Ocean meets cooler southern influences. Sea water temperatures here are noticeably seasonal and cooler than in northern WA. During summer, water temperatures typically range from about 18°C to 21°C, offering refreshing conditions that suit active swimming on warm days. Autumn often remains comfortable, with temperatures around 17–20°C before cooling further through winter. In winter, sea water temperatures usually fall to about 15°C to 17°C, which feels cold on entry and limits how long most people stay in the water without protection. Spring brings a gradual warming trend, with temperatures rising back toward the high teens as summer approaches.

Swimming Conditions

Swimming is allowed and popular around Margaret River, particularly in summer and early autumn when water and air temperatures combine to create more comfortable conditions. Many beaches offer a mix of open ocean exposure and semi-sheltered bays, giving swimmers options depending on swell and wind. Even in summer, the water is cool rather than warm, and longer swims often suit confident swimmers. In winter, swimming continues mainly among surfers, ocean swimmers and locals who are accustomed to colder water, with wetsuits commonly used for comfort and safety. The area is internationally known for surfing, and many people spend extended time in the water thanks to proper thermal gear. Overall, Margaret River provides rewarding swimming opportunities during the warmer months, with cooler conditions encouraging active water use rather than relaxed, warm-water bathing.