Clutha River – current water temperature and swimming conditions
This page provides information about the current water temperature at Clutha 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 Clutha River today is 13°C.
Water Temperature in Clutha 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 Clutha River have generally increased, although a slight cooling trend has set in over the last week.
According to our forecast, the water temperature in Clutha River will be 11.6°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 7 | 12.0°C | 10.1°C | |
| May 8 | 12.0°C | 10.1°C | |
| May 9 | 13.4°C | 10.1°C | |
| May 10 | 13.4°C | 10.1°C | |
| May 11 | 13.4°C | 10.1°C | |
| May 12 | 13.4°C | 10.1°C | |
| May 13 | 13.2°C | 10.1°C | |
| May 14 | 11.9°C | 10.1°C | |
| May 15 | 12.9°C | 10.1°C | 12.9°C |
| May 16 | 10.1°C | 12.7°C | |
| May 17 | 10.1°C | 12.5°C | |
| May 18 | 10.1°C | 12.3°C | |
| May 19 | 10.1°C | 12.2°C | |
| May 20 | 10.1°C | 12.0°C | |
| May 21 | 10.1°C | 11.8°C | |
| May 22 | 10.1°C | 11.6°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 |
Clutha River: Water Temperature by Location
Clutha River: Weather Forecast
May 15
May 16
May 17
May 18
May 19
Location & Local Information
Source Mount Brewster • location Southern Alps • elevation 1,540 metres (5,050 ft) Mouth Pacific Ocean • coordinates 46°21′S 169°48′E • elevation Sea level Length 338 km (210 mi)
The Clutha River is the largest river by volume in New Zealand and a defining natural feature of the Otago Region, flowing from Lake Wānaka through Central and South Otago to the Pacific Ocean. Water temperatures in the Clutha are strongly influenced by alpine sources, lake outflows, and seasonal air temperatures. In summer, the river typically reaches around 15–19 °C, occasionally feeling slightly warmer in slow-moving sections or near riverbanks. During spring and autumn, temperatures usually sit between 10–14 °C. In winter, the water is cold, often around 6–9 °C, reflecting snowmelt and low seasonal warmth.
Swimming Conditions
Swimming in the Clutha River is allowed but requires care due to its size, strength, and cold water. In summer, swimming is possible and enjoyed at known calm access points, particularly downstream of lakes where flow is more stable. Even in warm weather, the water can feel cool, and sudden depth changes or strong currents are common. After heavy rain, flow increases significantly, reducing swimming suitability. For these reasons, swimming is best limited to recognised spots and warm, settled conditions. Outside summer, low temperatures and fast currents make the river unsuitable for most swimmers. Overall, the Clutha River can offer refreshing summer swimming for confident swimmers in appropriate locations, while for much of the year it is better appreciated for its scenery and power rather than direct water contact.