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 10°C.
Water Temperature in Lake Tekapo: Daily Trends, Historical Records, and Forecast
⚠️ Lake temperatures between 10 and 15°C are cold but can be manageable for short swims on sunny, warm days. Shallow areas may feel slightly warmer, while deeper sections remain cold and slow to warm up. Most swimmers keep sessions brief, and wetsuits are often used for comfort. Wind and cooler air temperatures can quickly reduce how pleasant the swim feels.
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 5.8°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 | 9.3°C | 5.2°C | |
| Jul 3 | 9.3°C | 5.2°C | |
| Jul 4 | 9.4°C | 5.2°C | |
| Jul 5 | 9.5°C | 5.2°C | |
| Jul 6 | 10.4°C | 5.2°C | |
| Jul 7 | 10.4°C | 5.2°C | |
| Jul 8 | 10.1°C | 5.2°C | |
| Jul 9 | 10.1°C | 5.2°C | |
| Jul 10 | 10.2°C | 5.2°C | 10.2°C |
| Jul 11 | 5.2°C | 9.6°C | |
| Jul 12 | 5.2°C | 9.0°C | |
| Jul 13 | 5.2°C | 8.3°C | |
| Jul 14 | 5.2°C | 7.7°C | |
| Jul 15 | 5.2°C | 7.1°C | |
| Jul 16 | 5.2°C | 6.5°C | |
| Jul 17 | 5.2°C | 5.8°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
July 10
July 11
July 12
July 13
July 14
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.