Grassy Head – current water temperature and swimming conditions

Water Temperature in Grassy Head: 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 Grassy Head have been on a steady rise over the past month and have continued to climb over the last week.

According to our forecast, Sea water temperature in Grassy Head will be 25.4°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

Grassy Head, on the Mid North Coast of New South Wales, looks out over the Tasman Sea and experiences water temperatures that change steadily through the year. In summer, the ocean is at its warmest, usually sitting between about 22–26 °C, which suits long swims and time in the surf. Autumn brings a gradual cool-down, with water temperatures commonly around 20–23 °C. Winter is cooler but still swimmable for many, with the sea typically in the range of 17–20 °C, while spring sees a slow rise from about 18 °C into the low twenties as the weather improves.