Kaikōura – current water temperature and swimming conditions

Water Temperature in Kaikōura: Daily Trends, Historical Records, and Forecast

⚠️ Water at this temperature feels cold and is generally suitable only for brief immersion. Swimming without a wetsuit can quickly become uncomfortable, and exposure time is usually short. These conditions are mainly suitable for experienced swimmers or those using proper thermal gear.

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 Kaikōura have been gradually cooling over the past month, with a further drop recorded during the last week.

According to our forecast, Sea water temperature in Kaikōura will be 12.4°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

Kaikōura is a coastal town in northern Canterbury, set between the Pacific Ocean and the Kaikōura Ranges. Sea temperatures here are influenced by deep offshore waters and ocean currents, which keep conditions relatively cool year-round. In winter, from June to August, the water generally ranges between 9–12°C, which feels properly cold and is usually only comfortable for hardy swimmers or those wearing full wetsuits. Through spring, temperatures gradually rise to around 11–14°C. Summer, from December to March, brings the mildest conditions, with sea temperatures commonly sitting between 15–19°C during settled, sunny spells. Early autumn can still see 14–17°C before cooling again as winter approaches.