Irwin River – current river water temperature and swimming conditions
This page shows the current river water temperature at Irwin River in Western Australia. 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 Irwin River today is 16°C.
Water Temperature in Irwin 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 Irwin 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 Irwin River will be 16.8°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 |
|---|---|---|---|
| Apr 28 | 17.2°C | 15.5°C | |
| Apr 29 | 17.5°C | 15.5°C | |
| Apr 30 | 17.7°C | 15.5°C | |
| May 1 | 17.1°C | 15.5°C | |
| May 2 | 16.1°C | 15.5°C | |
| May 3 | 16.6°C | 15.5°C | |
| May 4 | 15.0°C | 15.5°C | |
| May 5 | 14.4°C | 15.5°C | |
| May 6 | 15.7°C | 15.5°C | 15.7°C |
| May 7 | 15.5°C | 15.9°C | |
| May 8 | 15.5°C | 16.0°C | |
| May 9 | 15.5°C | 16.2°C | |
| May 10 | 15.5°C | 16.3°C | |
| May 11 | 15.5°C | 16.5°C | |
| May 12 | 15.5°C | 16.6°C | |
| May 13 | 15.5°C | 16.8°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 | 16°C | 25°C | 32°C |
| February | 17°C | 25°C | 33°C |
| March | 14°C | 24°C | 31°C |
| April | 8°C | 18°C | 27°C |
| May | 9°C | 16°C | 24°C |
| June | 9°C | 13°C | 17°C |
| July | 7°C | 13°C | 16°C |
| August | 11°C | 14°C | 18°C |
| September | 13°C | 16°C | 22°C |
| October | 15°C | 19°C | 23°C |
| November | 17°C | 22°C | 28°C |
| December | 19°C | 24°C | 33°C |
Location & Local Information
Source:
• location Near Pindar
• elevation 326 metres (1,070 ft)
Mouth:
• location Arurine Bay, between Port Denison and Dongara
• elevation Sea level
Length 140 km (87 mi)
The Irwin River flows through the Mid West of Western Australia, reaching the Indian Ocean near Dongara, and its water temperature reflects the region’s warm, dry climate. In summer, from December to February, when water is present, temperatures commonly sit around 22–26°C, sometimes feeling warmer in shallow pools during hot spells. Spring and autumn are milder, with water temperatures generally in the 18–22°C range. Winter is cooler and more variable, often around 14–18°C, particularly after rain or during overcast weather. The Irwin is a highly seasonal river, and long dry periods can reduce it to isolated pools or a dry channel, which strongly influences both temperature and swimming conditions.
Swimming Conditions
Swimming in the Irwin River is generally allowed, but it depends very much on timing. After winter rains or a good seasonal flow, locals do swim in deeper pools, especially upstream from the estuary. When conditions are right, the water temperature can be comfortable enough for a proper swim rather than just a quick dip. However, as water levels drop, quality can decline, with stagnant pools, muddy banks and submerged debris becoming common. Near the mouth, tidal influence and changing currents make swimming less suitable. For most people, swimming in the Irwin is an occasional inland experience, best enjoyed shortly after rain and with sensible spot selection.