Pomahaka River – current water temperature and swimming conditions
This page provides information about the current water temperature at Pomahaka River in Otago Region. 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 Pomahaka River today is 7°C.
Water Temperature in Pomahaka River: 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 Pomahaka 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 Pomahaka River will be 8.8°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 |
|---|---|---|---|
| Aug 19 | 13.0°C | 9.1°C | |
| Aug 20 | 13.1°C | 9.1°C | |
| Aug 21 | 13.0°C | 9.1°C | |
| Aug 22 | 12.5°C | 9.1°C | |
| Aug 23 | 12.7°C | 9.1°C | |
| Aug 24 | 12.7°C | 9.1°C | |
| Aug 25 | 6.5°C | 9.1°C | |
| Aug 26 | 6.5°C | 9.1°C | |
| Aug 27 | 6.5°C | 9.1°C | 6.5°C |
| Aug 28 | 9.1°C | 6.8°C | |
| Aug 29 | 9.1°C | 7.2°C | |
| Aug 30 | 9.1°C | 7.5°C | |
| Aug 31 | 9.1°C | 7.8°C | |
| Sep 1 | 9.1°C | 8.1°C | |
| Sep 2 | 9.1°C | 8.5°C | |
| Sep 3 | 9.1°C | 8.8°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 New Zealand to improve accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 13°C | 17°C | 21°C |
| February | 13°C | 17°C | 20°C |
| March | 12°C | 16°C | 19°C |
| April | 10°C | 13°C | 16°C |
| May | 7°C | 10°C | 13°C |
| June | 5°C | 8°C | 11°C |
| July | 3°C | 7°C | 10°C |
| August | 4°C | 7°C | 10°C |
| September | 6°C | 9°C | 12°C |
| October | 8°C | 11°C | 13°C |
| November | 9°C | 13°C | 17°C |
| December | 12°C | 16°C | 20°C |
Pomahaka River: Weather Forecast
August 28
August 29
August 30
August 31
September 1
Location & Local Information
The Pomahaka River in the Otago Region flows through rolling farmland before joining the Clutha River near Balclutha. As an inland South Island river without direct glacial sources, its water temperature reflects seasonal air conditions, though the southern climate keeps it relatively cool. In winter, temperatures are generally around 5–9°C. During spring, the river gradually warms to approximately 9–14°C as days become milder. In summer, particularly in January and February, calmer pools and wider sections can reach about 15–20°C on settled days. By autumn, temperatures usually ease back to between 9 and 15°C. After heavy rain, runoff from surrounding catchments can briefly lower temperatures and raise river levels.
Swimming Conditions
Swimming is allowed in suitable parts of the Pomahaka River, and locals sometimes use quiet pools during the warmer months. The most comfortable conditions are typically in mid to late summer when water temperatures approach or exceed the mid to high teens and flows are steady. However, swimmers should be aware of moderate currents, uneven riverbeds and occasional deeper holes. The river can rise quickly after rainfall, affecting both safety and water clarity. Choosing calm, known swimming spots and checking local conditions beforehand helps ensure a safer experience.