Ninety Mile Beach – current water temperature and swimming conditions

Water Temperature in Ninety Mile Beach: Daily Trends, Historical Records, and Forecast

⚠️ This is cool water that may feel brisk on entry. Swimming is usually limited to short sessions, and prolonged stays can become uncomfortable without thermal protection. Many swimmers choose a wetsuit, especially for surfing or open-water swimming.

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.

Water Temperature Over the Last 30 Days

Water temperatures in Ninety Mile Beach have been on a steady rise over the past month and have continued to climb over the last week.

According to our forecast, Sea water temperature in Ninety Mile Beach will be 16.3°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

Ninety Mile Beach in Northland stretches along the western edge of the Far North, facing the Tasman Sea, and is known for its vast, open coastline. Sea temperatures here vary through the year but remain relatively mild by New Zealand standards. In summer, typically from January to March, water temperatures range from about 18 to 21°C, which many locals consider suitable for swimming, especially on sunny, settled days. During autumn, the sea gradually cools to around 16 to 19°C. Winter sees temperatures drop further, usually sitting between 14 and 16°C, while spring brings a steady rise from roughly 15 up to 18°C as the warmer months approach. Even at its warmest, the water can feel fresh, but it is generally comfortable for a typical Kiwi beach visit.