Yanchep – current water temperature and swimming conditions

Water Temperature in Yanchep: 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 Yanchep 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 Yanchep will be 18.9°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

Yanchep sits on the northern edge of Perth’s City Coast, where reefs and lagoons break up the Indian Ocean and give the area a slightly more sheltered feel than many metro beaches. Water temperatures here follow the typical Perth pattern. In summer, from December to February, the sea usually sits around 21–24°C, feeling warm and comfortable on hot days. Autumn remains pleasant at about 19–22°C, while winter cools to roughly 16–18°C, which is brisk but still suitable for short swims. Spring brings a gradual warm-up again, generally ranging between 18–21°C as air temperatures rise.