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 15°C.
Water Temperature in Lake Roxburgh: Daily Trends, Historical Records, and Forecast
⚠️ A lake temperature of 15 to 20°C is considered cool to comfortable for swimming in Australia. On warm days with light winds, this range allows for relaxed swimming, especially in shallow or sheltered areas. Comfort depends strongly on air temperature and sunshine, as cooler or overcast weather can still make the water feel chilly. This range is common during spring and early summer.
Water Temperature Over the Last 30 Days
Water temperatures in Lake Roxburgh have been on a steady rise over the past month and have continued to climb over the last week.
According to our forecast, the water temperature in Lake Roxburgh will be 9.9°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 |
|---|---|---|---|
| Jul 2 | 12.0°C | 9.1°C | |
| Jul 3 | 12.0°C | 9.1°C | |
| Jul 4 | 12.1°C | 9.1°C | |
| Jul 5 | 12.2°C | 9.1°C | |
| Jul 6 | 14.3°C | 9.1°C | |
| Jul 7 | 14.3°C | 9.1°C | |
| Jul 8 | 13.6°C | 9.1°C | |
| Jul 9 | 13.0°C | 9.1°C | |
| Jul 10 | 15.2°C | 9.1°C | 15.2°C |
| Jul 11 | 9.1°C | 14.4°C | |
| Jul 12 | 9.1°C | 13.7°C | |
| Jul 13 | 9.1°C | 12.9°C | |
| Jul 14 | 9.1°C | 12.2°C | |
| Jul 15 | 9.1°C | 11.4°C | |
| Jul 16 | 9.1°C | 10.6°C | |
| Jul 17 | 9.1°C | 9.9°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
July 10
July 11
July 12
July 13
July 14
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.