Flat Rocks Beach – current water temperature and swimming conditions

Water Temperature in Flat Rocks Beach: Daily Trends, Historical Records, and Forecast

✅ Water in this range is comfortably warm and widely considered ideal for swimming. Most people can stay in the water for a long time without feeling cold. It works well for families, recreational swimming, and active water sports such as swimming, surfing, and paddleboarding.

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 Flat Rocks Beachfell over the past month, but have levelled out during the last week.

According to our forecast, Sea water temperature in Flat Rocks Beach will be 24.6°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

Flat Rocks Beach sits on the mid-west coast of Western Australia, not far from Dongara and Port Denison, facing the open Indian Ocean with a low, rocky shoreline broken by sandy patches. Water temperatures here are noticeably warmer than along the southern coast. In summer, from December to February, the sea usually sits around 22–25°C, which feels warm and comfortable for extended swimming. Autumn remains inviting at roughly 20–23°C, while winter brings a mild cool-down to about 17–19°C, still very manageable for most swimmers. Spring sees a steady rise again, typically 19–22°C, as air temperatures increase and conditions settle.