Lake Roundabout – current water temperature and swimming conditions
This page provides information about the current water temperature at Lake Roundabout in Canterbury 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 Roundabout today is 5°C.
Water Temperature in Lake Roundabout: 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 Roundabout 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 Roundabout will be 6.2°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 | 11.2°C | 6.3°C | |
| Aug 20 | 11.2°C | 6.3°C | |
| Aug 21 | 11.2°C | 6.3°C | |
| Aug 22 | 11.3°C | 6.3°C | |
| Aug 23 | 11.6°C | 6.3°C | |
| Aug 24 | 11.6°C | 6.3°C | |
| Aug 25 | 4.9°C | 6.3°C | |
| Aug 26 | 5.2°C | 6.3°C | |
| Aug 27 | 5.2°C | 6.3°C | 5.2°C |
| Aug 28 | 6.3°C | 5.3°C | |
| Aug 29 | 6.3°C | 5.5°C | |
| Aug 30 | 6.3°C | 5.6°C | |
| Aug 31 | 6.3°C | 5.8°C | |
| Sep 1 | 6.3°C | 5.9°C | |
| Sep 2 | 6.3°C | 6.0°C | |
| Sep 3 | 6.3°C | 6.2°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 | 9°C | 14°C | 19°C |
| February | 9°C | 15°C | 21°C |
| March | 7°C | 13°C | 19°C |
| April | 4°C | 10°C | 16°C |
| May | 2°C | 7°C | 12°C |
| June | 0°C | 4°C | 8°C |
| July | 0°C | 4°C | 7°C |
| August | 0°C | 4°C | 7°C |
| September | 3°C | 7°C | 11°C |
| October | 4°C | 9°C | 13°C |
| November | 6°C | 11°C | 15°C |
| December | 8°C | 13°C | 17°C |
Lake Roundabout: Weather Forecast
August 28
August 29
August 30
August 31
September 1
Location & Local Information
Lake Roundabout, in the Canterbury Region, is a small and relatively shallow inland lake set within open rural surroundings. Its modest size and limited depth mean that water temperatures respond quickly to seasonal air conditions. In winter, surface temperatures are generally around 6–10°C. During spring, the lake gradually warms to approximately 10–15°C as days become milder. In summer, particularly in January and February, shallow near-shore areas can reach about 16–21°C on warm, settled days. By autumn, temperatures usually ease back to between 10 and 15°C. Wind and rainfall can influence short-term changes in surface warmth and clarity, especially given the exposed Canterbury setting.
Swimming Conditions
Swimming may be possible at Lake Roundabout, but it is not widely known as a developed swimming destination. While summer water temperatures above the mid to high teens can feel comfortable, water quality may vary depending on rainfall, nutrient levels and seasonal conditions. The lake is more commonly valued for its quiet rural setting rather than organised recreation. Anyone considering swimming should assess current conditions carefully and check any available local water quality information. Choosing calm weather and shallow access points helps improve safety and comfort.