Lake Roxburgh – current water temperature and swimming conditions
This page provides information about the current water temperature at Lake Roxburgh 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 Lake Roxburgh today is 7°C.
Water Temperature in Lake Roxburgh: Daily Trends, Historical Records, and Forecast
❌ Lake water below 10°C is extremely cold and generally unsuitable for swimming for most people. Even during warm weather, deep lakes retain cold water, making entry uncomfortable and limiting time in the water. Swimming at this temperature is usually limited to quick dips or cold-water enthusiasts. Cool air temperatures or cloudy conditions can make lake swimming particularly harsh.
Water Temperature Over the Last 30 Days
Water temperatures in Lake Roxburgh 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 Lake Roxburgh will be 10.1°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 | 14.9°C | 10.6°C | |
| Aug 20 | 14.9°C | 10.6°C | |
| Aug 21 | 14.9°C | 10.6°C | |
| Aug 22 | 14.1°C | 10.6°C | |
| Aug 23 | 14.2°C | 10.6°C | |
| Aug 24 | 14.2°C | 10.6°C | |
| Aug 25 | 6.8°C | 10.6°C | |
| Aug 26 | 6.8°C | 10.6°C | |
| Aug 27 | 6.8°C | 10.6°C | 6.8°C |
| Aug 28 | 10.6°C | 7.3°C | |
| Aug 29 | 10.6°C | 7.8°C | |
| Aug 30 | 10.6°C | 8.2°C | |
| Aug 31 | 10.6°C | 8.7°C | |
| Sep 1 | 10.6°C | 9.2°C | |
| Sep 2 | 10.6°C | 9.7°C | |
| Sep 3 | 10.6°C | 10.1°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual lake water temperatures may differ from the reported values by several degrees, particularly during periods of strong winds or rapid weather changes. Wind can mix surface and deeper layers in a lake, bringing cooler water to the surface, while shallow areas may warm more quickly under direct sunlight. Air temperature, sunshine, and cloud cover strongly influence how quickly a lake heats up or cools down. These factors can lead to noticeable temperature variations across different parts of the lake.
Our forecast is based on a proprietary mathematical model that considers real-time lake temperature observations, historical trends, seasonal cycles, wind strength and direction, and region-specific air temperature. To enhance accuracy, we also incorporate data from nearby monitored locations and comparable lakes within New Zealand.
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 |
Lake Roxburgh: Weather Forecast
August 28
August 29
August 30
August 31
September 1
Location & Local Information
Lake Roxburgh is a long, narrow hydro lake formed by the Roxburgh Dam on the Clutha River in Central Otago. Surrounded by dry hills and schist landscapes, it experiences warm summers and cool winters typical of inland Otago. During summer, from December to February, surface water temperatures usually range between 16°C and 21°C, with sheltered bays occasionally feeling slightly warmer on calm, sunny days. In spring and autumn, temperatures commonly sit between 10°C and 15°C. Over winter, the lake cools significantly, often dropping to around 6°C to 9°C, reflecting colder air temperatures and reduced solar heating.
Swimming Conditions
Swimming is allowed and the lake is used for boating, fishing and other water-based recreation. However, as a hydro-electric reservoir, water levels can vary and there may be currents in certain sections influenced by dam operations and river flow. In mid-summer, when temperatures approach or exceed 18°C, conditions can be comfortable for a swim, particularly in sheltered areas away from boat traffic. Outside the main summer season, the cooler water makes swimming more suitable for brief immersion rather than extended periods. Visitors are generally advised to choose calm days and designated access points to ensure safer conditions.