Taumarunui – current water temperature and swimming conditions
This page provides information about the current water temperature at Taumarunui in Manawatū–Whanganui. Here you can view recent temperature trends on a 30-day chart, check typical monthly water temperature ranges, and compare today’s reading with historical averages for this date. A 7-day water temperature forecast, local weather conditions, and an overview of swimming suitability are also included.
Current Water Temperature
The water temperature in Whanganui River at Taumarunui today is 10°C.
Water Temperature in Whanganui River at Taumarunui: Daily Trends, Historical Records, and Forecast
❌ River water below 10°C is very cold and generally unsuitable for swimming for most people. Even on a warm day, rivers at this temperature can quickly cause cold shock and numbness due to flowing water and shaded banks. Swimming is usually limited to brief cold dips or experienced cold-water swimmers. Overcast weather or cool air temperatures make river swimming especially uncomfortable and potentially unsafe.
Water Temperature Over the Last 30 Days
Water temperatures in Taumarunui 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 Taumarunui will be 10.1°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 |
|---|---|---|---|
| Aug 19 | 14.8°C | 10.2°C | |
| Aug 20 | 14.8°C | 10.2°C | |
| Aug 21 | 14.5°C | 10.2°C | |
| Aug 22 | 14.5°C | 10.2°C | |
| Aug 23 | 14.8°C | 10.2°C | |
| Aug 24 | 14.8°C | 10.2°C | |
| Aug 25 | 9.6°C | 10.2°C | |
| Aug 26 | 9.6°C | 10.2°C | |
| Aug 27 | 9.6°C | 10.2°C | 9.6°C |
| Aug 28 | 10.2°C | 9.7°C | |
| Aug 29 | 10.2°C | 9.8°C | |
| Aug 30 | 10.2°C | 9.8°C | |
| Aug 31 | 10.2°C | 9.9°C | |
| Sep 1 | 10.2°C | 10.0°C | |
| Sep 2 | 10.2°C | 10.1°C | |
| Sep 3 | 10.2°C | 10.1°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 New Zealand to improve accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 14°C | 20°C | 25°C |
| February | 12°C | 17°C | 22°C |
| March | 10°C | 16°C | 21°C |
| April | 7°C | 13°C | 19°C |
| May | 5°C | 10°C | 14°C |
| June | 4°C | 9°C | 13°C |
| July | 3°C | 8°C | 12°C |
| August | 5°C | 9°C | 13°C |
| September | 7°C | 11°C | 15°C |
| October | 9°C | 13°C | 17°C |
| November | 9°C | 15°C | 21°C |
| December | 9°C | 15°C | 21°C |
Taumarunui: Weather Forecast
August 28
August 29
August 30
August 31
September 1
Location & Local Information
Taumarunui is located in the upper reaches of the Whanganui River, where the river is narrower and more strongly influenced by inland and hill country conditions. Water temperatures here show a clear seasonal pattern. In summer, the river typically warms to around 17–21 °C, which feels refreshing and suitable for swimming on hot days. During spring and autumn, temperatures usually sit between 13–17 °C. In winter, the water cools significantly, often dropping to about 8–11 °C, making it cold and uncomfortable for most swimmers.
Swimming Conditions
Swimming in the Whanganui River around Taumarunui is allowed and is a common summer activity, particularly at known local swimming holes and calm river bends. The warmer months provide the best conditions, with stable flows and water temperatures that suit short to moderate swims. However, the river’s character can change quickly after heavy rain, with increased flow and reduced clarity. Currents can also be stronger in narrower sections, so swimming is best done in familiar locations during settled weather. Outside summer, cooler temperatures and higher flows generally limit swimming to very brief dips. Overall, Taumarunui offers good seasonal swimming opportunities in the Whanganui River, especially in summer, while cooler months are better suited to enjoying the river from the bank rather than in the water.