Port Kennedy – current water temperature and swimming conditions

Water Temperature in Port Kennedy: Daily Trends, Historical Records, and Forecast

⚠️ This is cool water that may feel brisk on entry. Swimming is usually limited to short sessions, and prolonged stays can become uncomfortable without thermal protection. Many swimmers choose a wetsuit, especially for surfing or open-water swimming.

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

While water temperatures in Port Kennedy declined overall during the past month, they have shown a noticeable rebound over the last week.

According to our forecast, Sea water temperature in Port Kennedy will be 18.3°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

Port Kennedy sits on Perth’s City Coast just south of Rockingham, with a long sandy shoreline facing the open Indian Ocean. Water temperatures here are typical of the metro coastline and are comfortable for swimming across much of the year. In summer, from December to February, the sea usually ranges between 20–23°C, feeling pleasantly warm and refreshing during hot weather. Autumn stays inviting at around 18–21°C, while winter brings cooler conditions, generally about 16–18°C, which can feel brisk but still manageable for short swims. Spring marks a steady warm-up again, commonly sitting between 18–21°C as air temperatures rise.