Wānaka – current water temperature and swimming conditions

This page provides information about the current water temperature at Wānaka 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

10.9°C

Today

11.2°C

Yesterday

12.7°C

A Week Ago

The water temperature in Clutha River at Wānaka today is 11°C.

Water Temperature in Clutha River at Wānaka: 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

Water temperatures in Wānaka 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 Wānaka will be 11.9°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	12.5°C	12.0°C
May 7	12.5°C	12.0°C
May 8	12.7°C	12.0°C
May 9	12.7°C	12.0°C
May 10	12.6°C	12.0°C
May 11	12.6°C	12.0°C
May 12	12.5°C	12.0°C
May 13	11.2°C	12.0°C
May 14	10.9°C	12.0°C	10.9°C
May 15		12.0°C	11.0°C
May 16		12.0°C	11.2°C
May 17		12.0°C	11.3°C
May 18		12.0°C	11.5°C
May 19		12.0°C	11.6°C
May 20		12.0°C	11.7°C
May 21		12.0°C	11.9°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	20°C
February	13°C	17°C	21°C
March	12°C	16°C	19°C
April	3°C	10°C	17°C
May	9°C	12°C	15°C
June	8°C	11°C	13°C
July	7°C	9°C	11°C
August	7°C	9°C	11°C
September	7°C	10°C	12°C
October	8°C	11°C	14°C
November	9°C	12°C	15°C
December	11°C	15°C	19°C

Wānaka: Weather Forecast

May 15

6°C / 13°C

overcast

rain: 0% | wind: 2 km/h

May 16

6°C / 12°C

overcast

rain: 0% | wind: 2 km/h

May 17

6°C / 11°C

mainly clear

rain: 0% | wind: 2 km/h

May 18

5°C / 11°C

mainly clear

rain: 0% | wind: 2 km/h

May 19

6°C / 11°C

overcast

rain: 7% | wind: 4 km/h

Location & Local Information

Wānaka sits at the southern end of Lake Wānaka, where the Clutha River begins its long journey through Otago. In this upper section, the river’s water temperature is strongly influenced by the lake and surrounding alpine environment. During summer, temperatures near Wānaka are typically around 14–18 °C, occasionally edging a little higher during prolonged warm weather. In spring and autumn, the river usually cools to about 9–14 °C. Winter brings very cold conditions, often around 5–8 °C, reflecting snowmelt and low air temperatures.

Swimming Conditions

Swimming in the Clutha River near Wānaka is allowed, but it is generally less popular than swimming in the nearby lake. While summer temperatures can be refreshing rather than warm, the river’s steady flow and cold water mean it suits confident swimmers choosing calm, shallow sections close to the banks. Currents can be stronger than they appear, especially after rain or during snowmelt periods, and water temperature remains cool even on hot days. As a result, swimming is usually limited to short dips rather than long sessions. Outside summer, cold water temperatures make swimming uncomfortable for most people. Overall, Wānaka offers some summer swimming opportunities in the upper Clutha River, but the river is more often appreciated for its scenery and connection to the lake rather than as a primary swimming spot.

Nearby Places

Frequently Asked Questions

What is the current water temperature in Clutha River at Wānaka?

The water temperature in Clutha River at Wānaka today is 11°C.

What is the water temperature in Clutha River at Wānaka during the summer months?

In summer, water temperatures in Clutha River at Wānaka at Wangi Wangi typically range from 11°C to 21°C.

Is it possible to swim in Clutha River at Wānaka (Otago Region)?

Yes — you can swim in parts of the Clutha River / Mata‑Au around Wānaka, but it is glacier‑fed so the water stays very cold year‑round and strong currents, cold shock and hidden drop‑offs make many spots hazardous. If you do enter the river choose calm, sheltered areas, wear a wetsuit or flotation device, never swim alone and check local signage and conditions — for most people Lake Wānaka is a safer, warmer option.