Wainuiomata Coast – current water temperature and swimming conditions

Water Temperature in Wainuiomata Coast: 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

Over the last 30 days, water temperatures in Wainuiomata Coast have trended upward, with conditions remaining relatively stable over the past week.

According to our forecast, Sea water temperature in Wainuiomata Coast will be 15.2°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

The Wainuiomata Coast stretches along the rugged southern edge of the Wellington Region, facing into Cook Strait. Sea temperatures here are shaped by strong tidal movement and frequent winds that push cooler water through the strait. In winter, from June to August, the water generally ranges between 10–13°C, which feels very cold and is typically only comfortable for surfers or swimmers in full wetsuits. As spring progresses, temperatures rise gradually to around 13–15°C. Summer, from December to March, brings the mildest conditions, with sea temperatures commonly sitting between 16–19°C during settled weather. Early autumn can still see around 15–17°C before cooling again.