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 12°C.
Water Temperature in Pomahaka River: Daily Trends, Historical Records, and Forecast
⚠️ River water between 10 and 15°C is cold but manageable for short swims, especially on sunny days with warm air temperatures. The moving nature of a river can make the water feel colder than the actual reading, particularly in shaded or deeper sections. Casual swimming is usually brief, with wetsuits often preferred. Windy or cool weather can significantly reduce comfort, even when the air temperature is mild.
Water Temperature Over the Last 30 Days
Over the past 30 days, water temperatures in Pomahaka River have generally increased, although a slight cooling trend has set in over the last week.
According to our forecast, the water temperature in Pomahaka River will be 10.3°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 |
|---|---|---|---|
| May 6 | 11.4°C | 10.0°C | |
| May 7 | 11.4°C | 10.0°C | |
| May 8 | 12.8°C | 10.0°C | |
| May 9 | 12.8°C | 10.0°C | |
| May 10 | 12.8°C | 10.0°C | |
| May 11 | 12.8°C | 10.0°C | |
| May 12 | 12.6°C | 10.0°C | |
| May 13 | 12.6°C | 10.0°C | |
| May 14 | 12.2°C | 10.0°C | 12.2°C |
| May 15 | 10.0°C | 11.9°C | |
| May 16 | 10.0°C | 11.7°C | |
| May 17 | 10.0°C | 11.4°C | |
| May 18 | 10.0°C | 11.1°C | |
| May 19 | 10.0°C | 10.8°C | |
| May 20 | 10.0°C | 10.6°C | |
| May 21 | 10.0°C | 10.3°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
May 15
May 16
May 17
May 18
May 19
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.