Lake Munmorah – current water temperature and swimming conditions
This page provides information about the current water temperature at Lake Munmorah in New South Wales. 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 Munmorah today is 23°C.
Water Temperature in Lake Munmorah: Daily Trends, Historical Records, and Forecast
✅ Lake water between 20 and 25°C offers very comfortable swimming conditions for most people. Combined with warm air temperatures and calm weather, this range is ideal for extended swims and family activities. Because lakes lack strong currents, the water often feels gentler and warmer than rivers. Even with light cloud cover, swimming remains enjoyable.
Water Temperature Over the Last 30 Days
Water temperatures in Lake Munmorah 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 Munmorah will be 21.1°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 |
|---|---|---|---|
| Mar 12 | 26.0°C | 20.7°C | |
| Mar 13 | 26.0°C | 20.7°C | |
| Mar 14 | 23.7°C | 20.7°C | |
| Mar 15 | 23.6°C | 20.7°C | |
| Mar 16 | 23.5°C | 20.7°C | |
| Mar 17 | 23.5°C | 20.7°C | |
| Mar 18 | 25.6°C | 20.7°C | |
| Mar 19 | 25.9°C | 20.7°C | |
| Mar 20 | 23.4°C | 20.7°C | 23.4°C |
| Mar 21 | 20.7°C | 23.1°C | |
| Mar 22 | 20.7°C | 22.8°C | |
| Mar 23 | 20.7°C | 22.4°C | |
| Mar 24 | 20.7°C | 22.1°C | |
| Mar 25 | 20.7°C | 21.8°C | |
| Mar 26 | 20.7°C | 21.5°C | |
| Mar 27 | 20.7°C | 21.1°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 | 18°C | 23°C | 27°C |
| February | 18°C | 22°C | 27°C |
| March | 17°C | 21°C | 26°C |
| April | 14°C | 18°C | 23°C |
| May | 11°C | 14°C | 19°C |
| June | 10°C | 13°C | 15°C |
| July | 9°C | 11°C | 14°C |
| August | 9°C | 12°C | 16°C |
| September | 11°C | 15°C | 19°C |
| October | 13°C | 17°C | 22°C |
| November | 15°C | 19°C | 24°C |
| December | 17°C | 21°C | 27°C |
Location & Local Information
Lake Munmorah is a cracking spot on the Central Coast of New South Wales, forming part of a stunning lake system that's just a stone’s throw from the Pacific. If you’re checking the water temperature for a dip, you’ll find it’s a ripper for most of the year. During the height of summer, the lake water usually hits a balmy 23°C to 26°C, making it feel like a warm bath when the sun is properly blazing. Even when winter rolls around, the mercury rarely drops into freezing territory, typically hovering between a brisk 17°C and 19°C. It’s a bit fresher then, for sure, but still much more inviting than the southern lakes down in Victoria or Tassie.
Swimming Conditions
Swimming is definitely allowed and is a top-tier way to spend the day, especially at the Lake Munmorah Baths or over at Elizabeth Bay. These spots are absolute gold for families because the water is dead calm and protected from the heavy ocean swells just over the dunes. You’ve still got to use your noggin, though; while the water is generally top-notch, it’s a smart move to steer clear for a couple of days after a heavy downpour. Runoff from the surrounding catchment can make things a bit murky and spike the bacteria levels, so it’s best to wait for it to clear. As long as you stick to the sandy shallows and keep an eye on the local water quality reports, it’s a legendary place to float the day away.