St Andrews Beach – current water temperature and swimming conditions

Water Temperature in St Andrews Beach: Daily Trends, Historical Records, and Forecast

⚠️ Water in this range feels cool but still manageable for many swimmers. Short to moderate swims are comfortable, especially in warm weather. Some people may prefer a wetsuit for longer stays, particularly when swimming actively or outside peak summer conditions.

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.

Water Temperature Over the Last 30 Days

Water temperatures in St Andrews Beach have been gradually cooling over the past month, with a further drop recorded during the last week.

According to our forecast, Sea water temperature in St Andrews Beach will be 18.5°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

St Andrews Beach lies along the southern edge of the Mornington Peninsula, facing the open Bass Strait, and its water temperatures reflect the cooler, high-energy conditions of this coastline. In summer, the ocean generally warms to around 18–22 °C, which feels refreshing rather than warm but is still comfortable for swimming on sunny days. Autumn often stays mild, with water temperatures commonly between 16–20 °C, while spring is cooler at roughly 14–18 °C as the sea slowly warms after winter. During winter, temperatures typically drop to about 11–14 °C, which is cold and usually limits swimming to short dips or those wearing wetsuits.