Narrabeen Lagoon – current water temperature and swimming conditions
This page provides information about the current water temperature at Narrabeen Lagoon 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 Narrabeen Lagoon today is 17°C.
Water Temperature in Narrabeen Lagoon: 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 Narrabeen Lagoon 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 Narrabeen Lagoon will be 14.4°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 |
|---|---|---|---|
| Apr 28 | 19.3°C | 14.0°C | |
| Apr 29 | 19.2°C | 14.0°C | |
| Apr 30 | 19.0°C | 14.0°C | |
| May 1 | 19.0°C | 14.0°C | |
| May 2 | 17.0°C | 14.0°C | |
| May 3 | 17.0°C | 14.0°C | |
| May 4 | 17.0°C | 14.0°C | |
| May 5 | 17.0°C | 14.0°C | |
| May 6 | 17.0°C | 14.0°C | 17.0°C |
| May 7 | 14.0°C | 16.6°C | |
| May 8 | 14.0°C | 16.3°C | |
| May 9 | 14.0°C | 15.9°C | |
| May 10 | 14.0°C | 15.5°C | |
| May 11 | 14.0°C | 15.1°C | |
| May 12 | 14.0°C | 14.8°C | |
| May 13 | 14.0°C | 14.4°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 | 15°C | 23°C | 26°C |
| February | 20°C | 23°C | 26°C |
| March | 19°C | 21°C | 24°C |
| April | 16°C | 18°C | 20°C |
| May | 11°C | 14°C | 17°C |
| June | 8°C | 11°C | 13°C |
| July | 8°C | 10°C | 13°C |
| August | 8°C | 11°C | 13°C |
| September | 12°C | 14°C | 17°C |
| October | 15°C | 17°C | 19°C |
| November | 18°C | 20°C | 24°C |
| December | 13°C | 23°C | 25°C |
Location & Local Information
Narrabeen Lagoon is a proper coastal gem on Sydney’s Northern Beaches, offering a massive, calm playground for anyone looking to escape the ocean swell. When it comes to the water temperature, the lagoon is a bit of a seasonal legend. During the height of a cracking summer, the shallow, sun-drenched waters can hit a balmy 24°C to 27°C, which is absolute gold for a long afternoon soak. Even when the winter chill hits, the mercury rarely drops much below 16°C or 19°C, though the locals might tell you it feels a bit more invigorating if the wind is whipping across from the west. It’s the kind of spot that stays inviting for a splash long after the surf has started to bite.
Swimming Conditions
Swimming is definitely allowed and is a top-tier way to spend a weekend, especially at family-friendly spots like Birdwood Park or Bilarong Reserve. It’s a ripper choice for kids because the water is dead calm and protected, making it way less of a hassle than navigating the rips at the beach. You’ve just got to keep your wits about you and check the Beachwatch reports, as the water quality can go a bit wonky after a heavy downpour when runoff from the surrounding bushland washes in. Most folks reckon it’s best to steer clear for about three days after rain to let things settle. As long as the sun is shining and the water is clear, it’s a legendary spot to float the day away.