Gladstone – current water temperature and swimming conditions

Water Temperature in Gladstone: 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

Over the past 30 days, water temperatures in Gladstone have generally increased, although a slight cooling trend has set in over the last week.

According to our forecast, Sea water temperature in Gladstone will be 20.4°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

Gladstone sits in Central Queensland on the edge of the Coral Sea, and the water here stays relatively warm across the year, though a touch cooler than further north. In summer, from around December to March, sea temperatures are typically in the 25–27 °C range, making the water comfortable for swimming despite the warmer air and humidity. During winter, usually June to August, temperatures ease back to about 19–21 °C, which can feel cool at first but is still swimmable on sunny, calm days. Spring and autumn often provide the most balanced conditions, with water temperatures commonly sitting between 22–24 °C and more settled weather.