Mona Vale – current water temperature and swimming conditions

Water Temperature in Mona Vale: Daily Trends, Historical Records, and Forecast

✅ This water feels mild to warm and is comfortable for the majority of swimmers. Swimming is enjoyable, though longer stays may feel cooler for some people, especially in windy conditions. These temperatures are well suited to family outings and active swimming, particularly on warm days.

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 Mona Vale declined overall during the past month, they have shown a noticeable rebound over the last week.

According to our forecast, Sea water temperature in Mona Vale will be 21.1°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

Mona Vale, on Sydney’s Northern Beaches, faces the open Tasman Sea and experiences water temperatures that follow a clear seasonal cycle. In summer, the ocean is at its warmest, typically ranging from about 22–26 °C, which feels comfortable for longer swims and regular dips. Autumn brings a gradual cooling to roughly 20–23 °C, still pleasant for most swimmers. Winter is cooler but far from extreme, with sea temperatures generally between 16–20 °C. Spring sees a steady warm-up from around 18 °C into the low twenties as weather conditions settle and air temperatures rise.