Lake Keretā – current water temperature and swimming conditions
This page provides information about the current water temperature at Lake Keretā in Auckland 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 Keretā today is 12°C.
Water Temperature in Lake Keretā: 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 Keretā 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 Keretā will be 13.0°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 | 16.1°C | 13.1°C | |
| Aug 20 | 16.0°C | 13.1°C | |
| Aug 21 | 15.5°C | 13.1°C | |
| Aug 22 | 15.7°C | 13.1°C | |
| Aug 23 | 15.8°C | 13.1°C | |
| Aug 24 | 15.9°C | 13.1°C | |
| Aug 25 | 12.0°C | 13.1°C | |
| Aug 26 | 12.0°C | 13.1°C | |
| Aug 27 | 12.0°C | 13.1°C | 12.0°C |
| Aug 28 | 13.1°C | 12.1°C | |
| Aug 29 | 13.1°C | 12.3°C | |
| Aug 30 | 13.1°C | 12.4°C | |
| Aug 31 | 13.1°C | 12.6°C | |
| Sep 1 | 13.1°C | 12.7°C | |
| Sep 2 | 13.1°C | 12.8°C | |
| Sep 3 | 13.1°C | 13.0°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 | 17°C | 21°C | 25°C |
| February | 17°C | 22°C | 26°C |
| March | 15°C | 19°C | 23°C |
| April | 12°C | 16°C | 20°C |
| May | 9°C | 13°C | 17°C |
| June | 6°C | 11°C | 16°C |
| July | 5°C | 10°C | 14°C |
| August | 8°C | 12°C | 16°C |
| September | 8°C | 13°C | 17°C |
| October | 11°C | 15°C | 19°C |
| November | 13°C | 17°C | 21°C |
| December | 16°C | 20°C | 24°C |
Lake Keretā: Weather Forecast
August 28
August 29
August 30
August 31
September 1
Location & Local Information
Lake Keretā, in the Auckland Region west of Waiuku, is a small, shallow coastal dune lake surrounded by farmland and native vegetation. Its water temperature reflects the mild upper North Island climate and its limited depth. In winter, surface temperatures are generally around 11–15°C. During spring, the lake gradually warms to approximately 15–19°C as air temperatures increase. In summer, particularly in January and February, shallow areas can reach about 20–25°C on hot, settled days. By autumn, temperatures usually ease back to between 15 and 20°C. Because the lake is shallow, wind and rainfall can quickly influence surface temperature and clarity.
Swimming Conditions
Swimming is allowed at Lake Keretā, and it can be pleasant during the warmer months when water temperatures exceed 20°C. The most comfortable conditions are typically in mid to late summer on calm days with light winds. However, water quality can vary at times due to nutrient levels and occasional algal blooms during prolonged warm periods. Swimmers should use established access points and check current water quality information before entering the lake. Choosing settled weather conditions helps ensure a safer and more enjoyable freshwater swimming experience.