Alexandra – current water temperature and swimming conditions
This page provides information about the current water temperature at Alexandra 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 Clutha River at Alexandra today is 7°C.
Water Temperature in Clutha River at Alexandra: 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 Alexandra 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 Alexandra will be 9.7°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 |
|---|---|---|---|
| Aug 19 | 13.7°C | 10.2°C | |
| Aug 20 | 13.8°C | 10.2°C | |
| Aug 21 | 13.7°C | 10.2°C | |
| Aug 22 | 12.8°C | 10.2°C | |
| Aug 23 | 12.9°C | 10.2°C | |
| Aug 24 | 12.9°C | 10.2°C | |
| Aug 25 | 6.5°C | 10.2°C | |
| Aug 26 | 6.5°C | 10.2°C | |
| Aug 27 | 6.5°C | 10.2°C | 6.5°C |
| Aug 28 | 10.2°C | 7.0°C | |
| Aug 29 | 10.2°C | 7.4°C | |
| Aug 30 | 10.2°C | 7.9°C | |
| Aug 31 | 10.2°C | 8.4°C | |
| Sep 1 | 10.2°C | 8.8°C | |
| Sep 2 | 10.2°C | 9.3°C | |
| Sep 3 | 10.2°C | 9.7°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 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 |
Alexandra: Weather Forecast
August 28
August 29
August 30
August 31
September 1
Location & Local Information
Alexandra sits along the Clutha River in the heart of Central Otago, a region known for hot summers and cold winters. The river’s water temperature near Alexandra reflects this strong seasonal contrast, moderated slightly by upstream lakes. In summer, temperatures typically range from about 16–20 °C, which many people find refreshing rather than warm. During spring and autumn, the river usually cools to around 11–15 °C. In winter, temperatures often drop to roughly 6–9 °C, making the water very cold and unsuitable for extended immersion.
Swimming Conditions
Swimming in the Clutha River around Alexandra is allowed and does take place during summer, particularly at calmer, well-known access points close to the riverbank. Warm air temperatures in Central Otago make the cool water appealing on hot days, and short swims or quick dips are common. However, the Clutha remains a large and powerful river, with noticeable currents and sudden depth changes. After heavy rain, flow can increase quickly, reducing swimming suitability. For these reasons, swimming is best limited to settled summer weather and locations familiar to locals. Outside the summer season, low water temperatures and stronger flows mean the river is generally not suitable for swimming, and it is more often enjoyed for its scenery and riverside recreation rather than direct water use.