Clarence River – current river water temperature and swimming conditions
This page shows the current river water temperature at Clarence River in New South Wales. 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 Clarence River today is 19°C.
Water Temperature in Clarence River: Daily Trends, Historical Records, and Forecast
⚠️ A river temperature of 15 to 20°C is generally considered cool to comfortable for swimming in Australia. On warm, calm days, this range allows for relaxed swimming and longer time in the water. Comfort depends heavily on air temperature and sunshine, as cooler weather can still make the water feel chilly. This range is popular for river swimming during spring and early autumn.
Water Temperature Over the Last 30 Days
Water temperatures in Clarence River have been gradually cooling over the past month, with a further drop recorded during the last week.
According to our forecast, the water temperature in Clarence River will be 19.7°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 |
|---|---|---|---|
| Apr 28 | 21.0°C | 19.7°C | |
| Apr 29 | 21.0°C | 19.7°C | |
| Apr 30 | 21.0°C | 19.7°C | |
| May 1 | 21.0°C | 19.7°C | |
| May 2 | 21.0°C | 19.7°C | |
| May 3 | 19.3°C | 19.7°C | |
| May 4 | 19.2°C | 19.7°C | |
| May 5 | 19.2°C | 19.7°C | |
| May 6 | 19.4°C | 19.7°C | 19.4°C |
| May 7 | 19.7°C | 19.4°C | |
| May 8 | 19.7°C | 19.5°C | |
| May 9 | 19.7°C | 19.5°C | |
| May 10 | 19.7°C | 19.6°C | |
| May 11 | 19.7°C | 19.6°C | |
| May 12 | 19.7°C | 19.6°C | |
| May 13 | 19.7°C | 19.7°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 | 27°C | 28°C | 29°C |
| February | 25°C | 27°C | 29°C |
| March | 23°C | 25°C | 27°C |
| April | 21°C | 23°C | 25°C |
| May | 17°C | 20°C | 22°C |
| June | 16°C | 17°C | 18°C |
| July | 15°C | 16°C | 16°C |
| August | 15°C | 17°C | 20°C |
| September | 17°C | 20°C | 22°C |
| October | 21°C | 23°C | 25°C |
| November | 24°C | 26°C | 27°C |
| December | 25°C | 27°C | 28°C |
Clarence River: Water Temperature by Location
Location & Local Information
Source Border Ranges
• location near Tooloom National Park and Bonalbo
• elevation 252 m (827 ft)
2nd source Maryland River
Mouth Coral Sea, South Pacific Ocean
• location near Iluka and Yamba
• coordinates 29°25′32.6″S 153°21′19.4″E
Length 394 km (245 mi)
The Clarence River is one of the largest river systems on the NSW coast, flowing from the tablelands down to the Pacific near Yamba. Its water temperature reflects a warm subtropical climate and varies along the river’s length. In summer, from December to February, temperatures are typically around 22–26°C, feeling pleasantly warm in slower reaches and backwaters. Spring and autumn are comfortable and steady, with water generally sitting between 18–23°C. Winter brings the coolest conditions, but the river rarely feels cold, usually ranging from about 16–20°C, especially in deeper sections where temperatures change more slowly. Tides and rainfall can influence both temperature and clarity, particularly closer to the mouth.
Swimming Conditions
Swimming in the Clarence River is generally allowed and quite popular, especially in inland and upper sections where the flow is gentler. In summer, the water temperature is usually comfortable enough for proper swimming, floating and cooling off on hot days. Many locals use familiar river beaches and calm bends. However, conditions vary by location. Closer to the mouth, tidal currents, boat traffic and occasional bull sharks make swimming less suitable. After heavy rain, visibility can drop and currents can strengthen. With sensible spot choice, settled weather and local awareness, swimming in the Clarence can be enjoyable and refreshing for much of the year.