Lake Boomanjin – current water temperature and swimming conditions
This page provides information about the current water temperature at Lake Boomanjin in Queensland. 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 Boomanjin today is 18°C.
Water Temperature in Lake Boomanjin: 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 Boomanjin 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 Boomanjin will be 17.8°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 |
|---|---|---|---|
| Aug 14 | 18.0°C | 17.8°C | |
| Aug 15 | 18.4°C | 17.8°C | |
| Aug 16 | 18.0°C | 17.8°C | |
| Aug 17 | 17.9°C | 17.8°C | |
| Aug 18 | 17.9°C | 17.8°C | |
| Aug 19 | 17.8°C | 17.8°C | |
| Aug 20 | 17.8°C | 17.8°C | |
| Aug 21 | 17.9°C | 17.8°C | |
| Aug 22 | 18.1°C | 17.8°C | 18.1°C |
| Aug 23 | 17.8°C | 18.1°C | |
| Aug 24 | 17.8°C | 18.0°C | |
| Aug 25 | 17.8°C | 18.0°C | |
| Aug 26 | 17.8°C | 18.0°C | |
| Aug 27 | 17.8°C | 17.9°C | |
| Aug 28 | 17.8°C | 17.9°C | |
| Aug 29 | 17.8°C | 17.8°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 Australia.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 26°C | 29°C | 30°C |
| February | 26°C | 28°C | 30°C |
| March | 24°C | 27°C | 29°C |
| April | 21°C | 23°C | 26°C |
| May | 17°C | 20°C | 23°C |
| June | 14°C | 17°C | 19°C |
| July | 13°C | 16°C | 18°C |
| August | 15°C | 18°C | 22°C |
| September | 19°C | 22°C | 24°C |
| October | 21°C | 25°C | 27°C |
| November | 24°C | 26°C | 29°C |
| December | 26°C | 27°C | 29°C |
Location & Local Information
Lake Boomanjin is a large perched freshwater lake on K’gari (Fraser Island), surrounded by sand dunes and low heath vegetation. Its water temperature follows the local subtropical climate and tends to be comfortable for swimming through much of the year. In summer, the lake usually warms to around 22–26°C, feeling pleasantly mild and well suited to longer swims. During spring and autumn, temperatures generally sit between 20–23°C, remaining comfortable on most days. In winter, the water cools slightly to about 18–21°C, but it rarely feels cold, especially in sunny, sheltered conditions.
Swimming Conditions
Swimming in Lake Boomanjin is allowed and commonly enjoyed, particularly along sandy shorelines where the water is calm and shallow. Like other perched lakes on the island, the water is fresh, still, and free from currents, waves, or tides, making it suitable for relaxed swimming and floating. The surrounding sand naturally filters the water, helping maintain good clarity and quality. To protect the lake’s delicate ecosystem, there are restrictions on soaps and some sunscreens, but these do not limit swimming itself. Overall, Lake Boomanjin offers reliable swimming conditions with moderate water temperatures and a quiet, natural setting, making it an appealing freshwater alternative to ocean swimming on K’gari.