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

11.3°C

Today

11.7°C

Yesterday

13.2°C

A Week Ago

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

Water Temperature in Clutha River at Alexandra: 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 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 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	11.7°C	10.1°C
May 7	11.7°C	10.1°C
May 8	13.2°C	10.1°C
May 9	13.2°C	10.1°C
May 10	13.1°C	10.1°C
May 11	13.1°C	10.1°C
May 12	13.0°C	10.1°C
May 13	11.7°C	10.1°C
May 14	11.3°C	10.1°C	11.3°C
May 15		10.1°C	11.2°C
May 16		10.1°C	11.0°C
May 17		10.1°C	10.9°C
May 18		10.1°C	10.7°C
May 19		10.1°C	10.6°C
May 20		10.1°C	10.4°C
May 21		10.1°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

Alexandra: Weather Forecast

May 15

2°C / 10°C

overcast

rain: 0% | wind: 14 km/h

May 16

3°C / 11°C

partly cloudy

rain: 0% | wind: 12 km/h

May 17

1°C / 12°C

mainly clear

rain: 0% | wind: 10 km/h

May 18

3°C / 12°C

clear sky

rain: 0% | wind: 11 km/h

May 19

4°C / 11°C

overcast

rain: 8% | wind: 16 km/h

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.

Nearby Places

Frequently Asked Questions

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

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

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

In summer, water temperatures in Clutha River at Alexandra at Wangi Wangi typically range from 12°C to 21°C.

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

Yes — you can swim in parts of the Clutha/Mata‑au at Alexandra in the warmer months, but the river is lake‑fed and can stay surprisingly cold with strong currents, sudden drop‑offs and variable flows. Always check local advice and water‑quality notices, swim with someone, stick to recognised river beaches or shallow spots, and use a wetsuit or lifejacket after heavy rain or if you're unsure of conditions.