Molonglo River – current river water temperature and swimming conditions

This page shows the current river water temperature at Molonglo River in Australian Capital Territory. 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

18.8°C

Today

18.5°C

Yesterday

17.4°C

A Week Ago

The water temperature in Molonglo River today is 19°C.

Water Temperature in Molonglo 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

While water temperatures in Molonglo River declined overall during the past month, they have shown a noticeable rebound over the last week.

According to our forecast, the water temperature in Molonglo 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
Mar 12	19.5°C	19.8°C
Mar 13	19.5°C	19.8°C
Mar 14	17.4°C	19.8°C
Mar 15	17.2°C	19.8°C
Mar 16	18.9°C	19.8°C
Mar 17	18.9°C	19.8°C
Mar 18	18.8°C	19.8°C
Mar 19	18.5°C	19.8°C
Mar 20	18.8°C	19.8°C	18.8°C
Mar 21		19.8°C	18.9°C
Mar 22		19.8°C	19.1°C
Mar 23		19.8°C	19.2°C
Mar 24		19.8°C	19.3°C
Mar 25		19.8°C	19.4°C
Mar 26		19.8°C	19.6°C
Mar 27		19.8°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	18°C	23°C	29°C
February	18°C	22°C	27°C
March	16°C	20°C	23°C
April	10°C	15°C	19°C
May	7°C	11°C	14°C
June	7°C	9°C	13°C
July	6°C	8°C	10°C
August	6°C	9°C	11°C
September	9°C	13°C	16°C
October	11°C	16°C	21°C
November	15°C	20°C	24°C
December	15°C	21°C	27°C

Molonglo River: Water Temperature by Location

🔗 Canberra

Australian Capital Territory

18.7°C

Location & Local Information

Source Tinderry Range, Great Dividing Range
• location near Captains Flat
• coordinates 35°40′5″S 149°29′50″E
• elevation 1,130 m (3,710 ft)
Mouth confluence with the Murrumbidgee River
• location near Uriarra Crossing
• coordinates 35°14′30″S 148°58′4″E
• elevation 440 m (1,440 ft)
Length 115 km (71 mi)

The Molonglo River runs through the Canberra region and shows clear seasonal changes in water temperature, shaped by altitude, weather and regulated flows. In summer, from December to February, the river typically sits around 16–22°C, warming a little more in slow-moving pools during hot spells. Spring and autumn are cooler and more variable, with water temperatures generally in the 12–18°C range. Winter brings a definite chill, and the Molonglo often drops to about 6–10°C, feeling cold even on sunny days. Releases from upstream areas and overnight cold can keep temperatures lower than people expect, especially early in the morning.

Swimming Conditions

Swimming in the Molonglo River is generally allowed, but it’s not a major swimming destination. In summer, some locals enjoy a brief dip in calmer sections, mainly to cool off rather than for long swims. The water temperature is usually tolerable in the warmer months, but still on the cool side compared to inland rivers further west. Water quality can vary, particularly after heavy rain, when runoff affects clarity and safety. There are also rocky banks, shallow stretches and occasional debris to consider. For these reasons, most people prefer nearby lakes or more established river spots, with the Molonglo better suited to short, refreshing dips than relaxed swimming.

Nearby Rivers

Frequently Asked Questions

What is the current water temperature in Molonglo River?

The water temperature in Molonglo River today is 19°C.

What is the water temperature in Molonglo River during the summer months?

In summer, water temperatures in Molonglo River typically range from 15°C to 29°C.

Is it possible to swim in Molonglo River (Australian Capital Territory)?

Yes — you can swim in parts of the Molonglo River, especially in calmer pools during the warmer months, but water temperatures are often cool outside summer and many spots are unpatrolled with natural hazards. Always check local water‑quality advisories and signage (including for blue‑green algae), avoid swimming after heavy rain when currents and contamination rise, choose sheltered spots with easy exits, and never swim alone.