Rosebud – current water temperature and swimming conditions

Water Temperature in Rosebud: 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

Over the past 30 days, water temperatures in Rosebud have generally increased, although a slight cooling trend has set in over the last week.

According to our forecast, Sea water temperature in Rosebud 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

Rosebud sits along the eastern side of Port Phillip Bay on the Mornington Peninsula, and its water temperatures benefit from the bay’s sheltered conditions. In summer, the sea is at its warmest, usually ranging from about 19–23°C, which makes it one of the more comfortable swimming spots in the region during hot weather. Autumn brings a gradual drop to roughly 17–20°C, while winter is cooler but still manageable, often around 13–15°C. Spring sees a steady warm-up, with water temperatures commonly sitting between 15–18°C, depending on sunshine and winds.