St Kilda – current water temperature and swimming conditions

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

✅ 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.

Water Temperature Over the Last 30 Days

Water temperatures in St Kilda have been on a steady rise over the past month and have continued to climb over the last week.

According to our forecast, Sea water temperature in St Kilda will be 19.0°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 Kilda sits on the northern shores of Port Phillip Bay, with its water temperatures shaped by the bay’s relatively sheltered conditions rather than the full force of Bass Strait. In summer, the water is at its warmest and most inviting, usually ranging from about 18–22°C, which suits swimming on hot Melbourne days. Autumn brings a gradual cooling to around 16–19°C, while winter is noticeably cooler, often sitting between 12–14°C. Spring sees a slow warm-up, with water temperatures commonly around 14–17°C, influenced by sunshine, winds and changing weather patterns.