Castlepoint – current water temperature and swimming conditions

Water Temperature in Castlepoint: 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 Castlepoint 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 Castlepoint will be 14.8°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

Castlepoint is one of the best-known coastal spots in the Wellington Region, set on the Wairarapa coast and facing the Pacific Ocean. Sea temperatures here follow the typical pattern for the lower east coast of the North Island. In winter, from June to August, the water generally ranges between 11–14°C, which feels properly cold and is usually suited to surfers or swimmers in wetsuits. As spring progresses, temperatures lift gradually to around 14–16°C. Summer, from December through March, brings the most comfortable conditions, with sea temperatures commonly sitting between 17–20°C during settled weather. Early autumn can still hold at 16–18°C before steadily cooling again.