Lake Tekapo – current water temperature and swimming conditions
This page provides information about the current water temperature at Lake Tekapo 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 Tekapo today is 4°C.
Water Temperature in Lake Tekapo: 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 Tekapo 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 Tekapo will be 5.5°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 | 11.0°C | 5.7°C | |
| Aug 20 | 11.0°C | 5.7°C | |
| Aug 21 | 10.9°C | 5.7°C | |
| Aug 22 | 11.0°C | 5.7°C | |
| Aug 23 | 11.3°C | 5.7°C | |
| Aug 24 | 11.4°C | 5.7°C | |
| Aug 25 | 4.3°C | 5.7°C | |
| Aug 26 | 4.3°C | 5.7°C | |
| Aug 27 | 4.3°C | 5.7°C | 4.3°C |
| Aug 28 | 5.7°C | 4.5°C | |
| Aug 29 | 5.7°C | 4.7°C | |
| Aug 30 | 5.7°C | 4.8°C | |
| Aug 31 | 5.7°C | 5.0°C | |
| Sep 1 | 5.7°C | 5.2°C | |
| Sep 2 | 5.7°C | 5.4°C | |
| Sep 3 | 5.7°C | 5.5°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 Tekapo: Weather Forecast
August 28
August 29
August 30
August 31
September 1
Location & Local Information
Lake Tekapo, in the Canterbury high country, is a glacial lake known for its bright turquoise colour and alpine setting. Fed by snowmelt from the Southern Alps, its water remains cold for much of the year. In winter, surface temperatures are typically around 4–8°C. During spring, continued snowmelt keeps the lake cool, generally between 6 and 10°C. In summer, especially in January and February, near-shore areas can warm to approximately 11–15°C on calm, sunny days, although deeper water remains significantly colder. By autumn, temperatures usually ease back to around 7–12°C. Wind and sudden weather changes can quickly affect surface conditions.
Swimming Conditions
Swimming is allowed from accessible shoreline areas around Lake Tekapo, including near the township. However, even in mid-summer the water feels cold due to its alpine origin. The most suitable time for a short swim is during settled summer weather when temperatures reach the low to mid teens. Swimmers should enter gradually to reduce the risk of cold shock and choose calm days, as strong winds can create choppy waves. While Lake Tekapo offers clear water and spectacular scenery, swimming here is typically brisk and refreshing rather than warm, and caution is recommended.