Marmong Picnic Area – water temperature at Lake Macquarie
This page provides up-to-date information about the water temperature at Marmong Picnic Area, located on the Lake Macquarie in New South Wales. Here you can check current conditions, view recent temperature trends, explore typical monthly ranges, and compare today’s reading with historical averages for this date. The page also includes a 7-day water temperature forecast, local weather information, and swimming conditions.
Current Water Temperature
The water temperature in Lake Macquarie at Marmong Picnic Area today is 16°C.
Water Temperature in Lake Macquarie at Marmong Picnic Area: 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 Marmong Picnic Area 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 Marmong Picnic Area will be 14.5°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 15 | 14.8°C | 14.3°C | |
| Aug 16 | 15.1°C | 14.3°C | |
| Aug 17 | 14.9°C | 14.3°C | |
| Aug 18 | 14.9°C | 14.3°C | |
| Aug 19 | 14.9°C | 14.3°C | |
| Aug 20 | 15.0°C | 14.3°C | |
| Aug 21 | 15.2°C | 14.3°C | |
| Aug 22 | 15.5°C | 14.3°C | |
| Aug 23 | 15.6°C | 14.3°C | 15.6°C |
| Aug 24 | 14.3°C | 15.4°C | |
| Aug 25 | 14.3°C | 15.3°C | |
| Aug 26 | 14.3°C | 15.1°C | |
| Aug 27 | 14.3°C | 15.0°C | |
| Aug 28 | 14.3°C | 14.8°C | |
| Aug 29 | 14.3°C | 14.6°C | |
| Aug 30 | 14.3°C | 14.5°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 Australia.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 20°C | 26°C | 28°C |
| February | 18°C | 24°C | 28°C |
| March | 16°C | 24°C | 27°C |
| April | 19°C | 21°C | 24°C |
| May | 15°C | 17°C | 20°C |
| June | 12°C | 14°C | 16°C |
| July | 12°C | 13°C | 15°C |
| August | 13°C | 14°C | 17°C |
| September | 16°C | 18°C | 19°C |
| October | 18°C | 21°C | 23°C |
| November | 21°C | 23°C | 25°C |
| December | 21°C | 25°C | 27°C |
Location & Local Information
Marmong Picnic Area sits on the western edge of Lake Macquarie, where water temperatures are strongly influenced by the lake’s broad, shallow layout. Over summer, from December through to February, the water here is usually in the range of about 22–25 °C, making it feel pleasantly warm for a dip. In autumn, temperatures ease back to around 18–21 °C, while winter is noticeably cooler, often sitting between 13 and 16 °C. As spring arrives, the lake gradually warms again, commonly reaching 18–21 °C by late October, depending on sunshine and wind conditions.
Swimming Conditions
Swimming at Marmong Picnic Area is allowed and fairly popular during the warmer months, particularly on calm days. The shoreline here is generally gentle, with quiet water and very little current, which makes it suitable for relaxed swimming rather than anything energetic. It’s not a formal swimming enclosure, so conditions can vary with wind and boat activity, and the water can feel cooler just off the edge in deeper sections. Water quality is usually fine for recreation, though occasional algae alerts can occur in hot, still periods. Overall, Marmong is best suited to casual summer swimming combined with picnicking, rather than being a dedicated swimming spot year-round.