Northern Rivers – Water Temperature Overview
This page provides information on Northern Rivers Region 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 Northern Rivers Region today is 24°C. Thus, the average water temperature is about 24°C. Water in this range is comfortably warm and widely considered ideal for swimming. Most people can stay in the water for a long time without feeling cold. It works well for families, recreational swimming, and active water sports such as swimming, surfing, and paddleboarding.
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 water temperature in the Northern Rivers has decreased by -2°C. 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 | 24°C | 26°C | 28°C |
| February | 25°C | 27°C | 29°C |
| March | 24°C | 27°C | 29°C |
| April | 23°C | 26°C | 28°C |
| May | 20°C | 23°C | 26°C |
| June | 19°C | 22°C | 25°C |
| July | 19°C | 21°C | 23°C |
| August | 18°C | 21°C | 23°C |
| September | 18°C | 21°C | 23°C |
| October | 19°C | 23°C | 26°C |
| November | 21°C | 24°C | 26°C |
| December | 22°C | 25°C | 27°C |
The Northern Rivers region of New South Wales stretches along a warm and scenic section of the Tasman Sea, influenced by the East Australian Current. This current helps keep sea water temperatures relatively mild throughout the year compared with much of the NSW coast. In summer, sea water temperatures commonly range from around 23°C to 26°C, providing very comfortable conditions for swimming. During autumn, temperatures usually remain pleasant at about 21–24°C before gradually cooling in winter. Winter sea temperatures typically sit between 18°C and 20°C, which can feel cool at first but are still suitable for swimming, especially on calm, sunny days. Spring brings a steady warming trend, with water temperatures climbing back into the low 20s°C.
Swimming Conditions
Swimming is allowed and widely enjoyed across the Northern Rivers coastline, which includes long sandy beaches, sheltered bays, and river mouths. Summer and early autumn are the peak swimming seasons, when warmer water allows for longer and more relaxed swims. In winter, swimming remains popular with locals, surfers, and open-water swimmers, although some people prefer shorter sessions or use wetsuits for extra comfort. The region’s beaches are also well suited to surfing, bodyboarding, and other ocean activities, with consistent swell and generally good water quality. Overall, the Northern Rivers offers reliable swimming conditions for much of the year, supported by moderate sea temperatures and a strong coastal culture focused on outdoor water use.