Mary River – current river water temperature and swimming conditions
This page shows the current river water temperature at Mary River in Queensland. You can explore recent temperature trends, typical monthly ranges, and historical averages for this date. The page also includes a 7-day water temperature forecast, local weather conditions, and an overview of how suitable the river is for swimming.
Current Water Temperature
The water temperature in Mary River today is 23°C.
Water Temperature in Mary River: Daily Trends, Historical Records, and Forecast
✅ River water between 20 and 25°C is ideal for swimming and offers very comfortable conditions for most people. Combined with warm air temperatures and settled weather, this range is perfect for extended swims and family-friendly activities. Rivers may still feel slightly cooler than lakes due to gentle currents, which many swimmers find refreshing. Even on partly cloudy days, swimming remains enjoyable.
Water Temperature Over the Last 30 Days
Water temperatures in Mary Riverfell over the past month, but have levelled out during the last week.
According to our forecast, the water temperature in Mary River will be 24.8°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Water Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Mar 12 | 23.0°C | 25.0°C | |
| Mar 13 | 23.0°C | 25.0°C | |
| Mar 14 | 23.0°C | 25.0°C | |
| Mar 15 | 23.0°C | 25.0°C | |
| Mar 16 | 23.2°C | 25.0°C | |
| Mar 17 | 23.0°C | 25.0°C | |
| Mar 18 | 23.0°C | 25.0°C | |
| Mar 19 | 23.0°C | 25.0°C | |
| Mar 20 | 23.0°C | 25.0°C | 23.0°C |
| Mar 21 | 25.0°C | 23.3°C | |
| Mar 22 | 25.0°C | 23.5°C | |
| Mar 23 | 25.0°C | 23.8°C | |
| Mar 24 | 25.0°C | 24.0°C | |
| Mar 25 | 25.0°C | 24.3°C | |
| Mar 26 | 25.0°C | 24.5°C | |
| Mar 27 | 25.0°C | 24.8°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual river water temperatures may vary by several degrees from the reported values, particularly after heavy rainfall or periods of changing weather. Rainfall, river flow rates, and runoff from cooler upstream areas can significantly affect water temperature, especially in flowing sections and shaded stretches. Air temperature and cloud cover also play an important role, with warm, sunny conditions helping rivers warm up more quickly. As a result, noticeable temperature differences can occur along the same river.
Our forecast is based on a proprietary mathematical model that takes into account real-time river temperature changes, historical data, seasonal patterns, river flow conditions, recent rainfall, and local air temperature. We also factor in broader weather conditions specific to each region of Australia to improve accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 24°C | 27°C | 30°C |
| February | 24°C | 26°C | 30°C |
| March | 23°C | 25°C | 29°C |
| April | 19°C | 22°C | 26°C |
| May | 16°C | 19°C | 23°C |
| June | 13°C | 16°C | 19°C |
| July | 13°C | 15°C | 18°C |
| August | 13°C | 17°C | 22°C |
| September | 16°C | 20°C | 24°C |
| October | 18°C | 23°C | 27°C |
| November | 21°C | 25°C | 29°C |
| December | 23°C | 26°C | 29°C |
Mary River: Water Temperature by Location
Location & Local Information
Source Conondale Range
• location Conondale, South East Queensland
• coordinates 26°47′39″S 152°44′41″E
• elevation 209 m (686 ft)
Mouth Great Sandy Strait
• location River Heads, Wide Bay–Burnett
• coordinates 25.4248°S 152.9380°E
• elevation 0 m (0 ft)
Length 291 km (181 mi)
The Mary River flows through south-east Queensland from the hinterland to the coast near the Great Sandy Strait, and its water temperature reflects the region’s warm subtropical climate. In summer, from December to February, the river commonly sits around 24–28°C, sometimes feeling warmer in slow bends and weir pools during prolonged heat. Spring and autumn are comfortable, with water temperatures generally in the 20–24°C range. Winter brings the coolest conditions of the year, but the Mary rarely feels cold, typically hovering around 16–20°C, especially in deeper reaches where temperatures change more slowly. Rainfall and upstream releases can influence clarity and flow, which can also affect how warm the water feels day to day.
Swimming Conditions
Swimming in the Mary River is generally allowed and does occur, particularly in inland sections and during the warmer months. In summer, the water temperature is usually pleasant enough for proper swimming rather than just a quick dip, and locals often head to familiar, calmer spots away from strong current. However, conditions vary along the river. After heavy rain, flows can rise quickly and visibility can drop. In lower reaches, tidal influence, boat traffic and the possibility of bull sharks mean swimming is less common. With sensible timing, settled weather and good spot selection, the Mary offers enjoyable swimming opportunities for much of the year.