Cottesloe Beach – current water temperature and swimming conditions

Water Temperature in Cottesloe Beach: 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 Cottesloe Beach declined overall during the past month, they have shown a noticeable rebound over the last week.

According to our forecast, Sea water temperature in Cottesloe Beach will be 18.6°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

Cottesloe Beach is one of Perth’s most iconic beaches, stretching along the City Coast and facing the open Indian Ocean with a wide sweep of sand and clear water. Sea temperatures here are comfortable for swimming across much of the year. In summer, from December to February, the water typically ranges between 21–24°C, feeling warm and inviting on hot days. Autumn remains pleasant at around 19–22°C, while winter cools to roughly 16–18°C, which is brisk but still swimmable for shorter dips. Spring brings a steady warm-up again, generally sitting between 18–21°C as air temperatures rise.