Sydney – water temperature at Parramatta River
This page provides up-to-date information about the water temperature at Sydney, located on the Parramatta River in New South Wales. Here you can check current conditions, view recent temperature trends, explore typical monthly ranges, and compare today’s reading with historical averages for this date. The page also includes a 7-day water temperature forecast, local weather information, and swimming conditions.
Current Water Temperature
The water temperature in Parramatta River at Sydney today is 21°C.
Water Temperature in Parramatta River at Sydney: 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 Sydney have remained fairly stable over the past 30 days, though a cooler trend has emerged in the last week.
According to our forecast, the water temperature in Sydney will be 21.9°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 | 22.0°C | 22.0°C | |
| Mar 13 | 21.9°C | 22.0°C | |
| Mar 14 | 22.9°C | 22.0°C | |
| Mar 15 | 20.0°C | 22.0°C | |
| Mar 16 | 20.0°C | 22.0°C | |
| Mar 17 | 21.4°C | 22.0°C | |
| Mar 18 | 21.4°C | 22.0°C | |
| Mar 19 | 21.3°C | 22.0°C | |
| Mar 20 | 21.0°C | 22.0°C | 21.0°C |
| Mar 21 | 22.0°C | 21.1°C | |
| Mar 22 | 22.0°C | 21.3°C | |
| Mar 23 | 22.0°C | 21.4°C | |
| Mar 24 | 22.0°C | 21.5°C | |
| Mar 25 | 22.0°C | 21.6°C | |
| Mar 26 | 22.0°C | 21.8°C | |
| Mar 27 | 22.0°C | 21.9°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 | 15°C | 24°C | 27°C |
| February | 21°C | 24°C | 27°C |
| March | 20°C | 22°C | 24°C |
| April | 16°C | 18°C | 21°C |
| May | 11°C | 14°C | 17°C |
| June | 10°C | 12°C | 13°C |
| July | 9°C | 11°C | 13°C |
| August | 10°C | 12°C | 14°C |
| September | 12°C | 15°C | 18°C |
| October | 16°C | 19°C | 22°C |
| November | 18°C | 21°C | 25°C |
| December | 13°C | 24°C | 26°C |
Location & Local Information
Sydney sits around a wide network of waterways, and the Parramatta River is one of the city’s most important tidal rivers, flowing through the inner suburbs into Sydney Harbour. Water temperatures in the river are generally more stable than the open Tasman Sea and often feel slightly warmer, especially in sheltered bays. In summer, river temperatures typically range from about 22–26 °C, and can feel warmer in shallow areas on calm days. Autumn sees a gradual cooling to roughly 20–23 °C. Winter is cooler but still manageable for many swimmers, with temperatures usually around 16–20 °C, while spring brings a steady rise from about 18 °C into the low twenties as air temperatures improve.
Swimming Conditions
Swimming in the Parramatta River is allowed in designated areas and has become increasingly popular as water quality has improved over recent years. Purpose-built swimming spots and harbourside baths provide safer options away from boat traffic and stronger tidal flows. Unlike ocean beaches, there are no waves, which makes the experience calmer and more relaxed. However, conditions can vary with rainfall, tides, and local activity, so swimming is best done at approved locations. When conditions are right, the Parramatta River offers a surprisingly pleasant and accessible swimming option right in the heart of Sydney.