Belmont – current water temperature and swimming conditions

Water Temperature in Belmont: 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

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

According to our forecast, Sea water temperature in Belmont will be 21.9°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

Belmont sits just south of Newcastle on the edge of Lake Macquarie, with easy access to both the lake and the open Tasman Sea. Water temperatures here are fairly mild by New South Wales standards. In summer, ocean temperatures usually sit around 22–25 °C, while the lake can feel a touch warmer on calm days, making swimming comfortable and popular. Autumn often holds onto the warmth, with water temperatures commonly between 20–23 °C, while spring is cooler at roughly 18–21 °C as conditions gradually improve. During winter, temperatures typically drop to about 17–19 °C, which is cool but still swimmable for many people, especially on sunny, low-wind days.