St Andrews – current water temperature and swimming conditions

Water Temperature in St Andrews: Daily Trends, Historical Records, and Forecast

❌ Water below this temperature is extremely cold and unsafe for casual swimming. Exposure can quickly lead to loss of muscle control and rapid cooling. Swimming in these conditions should only be attempted by experienced individuals with full thermal protection and proper safety measures.

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 St Andrews 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 St Andrews will be 10.6°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

St Andrews is a small coastal settlement in South Canterbury, facing the Pacific Ocean along a long, open stretch of shoreline. Sea temperatures here reflect the cool eastern waters typical of this part of the South Island. In winter, from June to August, the water generally ranges between 8–11°C, which feels distinctly cold and is usually only comfortable for hardy swimmers or those wearing full wetsuits. Through spring, temperatures gradually rise to around 10–13°C. Summer, from December to March, brings the mildest conditions, with sea temperatures commonly sitting between 13–17°C during settled, sunny spells. Early autumn can still see 12–15°C before cooling again as winter approaches.