Sydney North Coast – Water Temperature Overview
This page provides information on Sydney North Coast locations where sea water temperature data is available, including current conditions, monthly ranges and historical records.
Current Water Temperature
The current water temperature in the Sydney North Coast today is within the range of 22-23°C. Thus, the average water temperature is about 23°C. This water feels mild to warm and is comfortable for the majority of swimmers. Swimming is enjoyable, though longer stays may feel cooler for some people, especially in windy conditions. These temperatures are well suited to family outings and active swimming, particularly on warm days.
It’s important to note that these swimming tips and recommendations apply only in settled weather. When air temperatures drop below 20°C — and sometimes even below 25°C — swimming can feel uncomfortable, even when water temperatures are relatively high.
Sea Temperature Trends
Over the past month, the sea water temperature has remained largely unchanged. Overall, the sea water temperature is within the range expected based on historical data for this month.
Water Temperature and Swimming Conditions by Month
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 20°C | 23°C | 25°C |
| February | 21°C | 24°C | 27°C |
| March | 20°C | 23°C | 26°C |
| April | 19°C | 22°C | 25°C |
| May | 16°C | 20°C | 24°C |
| June | 15°C | 19°C | 23°C |
| July | 15°C | 18°C | 21°C |
| August | 15°C | 18°C | 20°C |
| September | 16°C | 18°C | 20°C |
| October | 16°C | 19°C | 21°C |
| November | 17°C | 20°C | 22°C |
| December | 18°C | 22°C | 25°C |
The Sydney North Coast covers a stretch of the Tasman Sea coastline from the northern suburbs of Sydney up through areas such as Manly, Dee Why, Avalon and Palm Beach. Sea water temperatures here are influenced by the East Australian Current, which brings relatively warm water south along the coast. In summer, sea water temperatures typically range from about 21°C to 24°C, creating comfortable conditions for swimming at most beaches. During autumn, temperatures often remain mild at around 19–22°C before cooling through winter. Winter sea water temperatures usually sit between 16°C and 18°C, which can feel cool on entry but are still manageable for many swimmers, particularly on calm and sunny days. Spring sees a gradual warming trend, with temperatures rising back toward the low 20s°C.
Swimming Conditions
Swimming is allowed and widely enjoyed along the Sydney North Coast, supported by clean ocean water, patrolled beaches, and a strong beach-going culture. Summer and early autumn are the most popular times for swimming, when warmer water allows for longer and more relaxed sessions in the sea. In winter, swimming continues year-round among locals, surfers and ocean swimmers, although many people prefer shorter swims or wear wetsuits for added comfort. Ocean baths and sheltered sections of coastline provide safer options when surf conditions are rough. Overall, the Sydney North Coast offers reliable swimming opportunities for much of the year, combining moderate sea water temperatures with well-managed beaches and varied coastal environments.