Hamilton's Gap – current water temperature and swimming conditions

Water Temperature in Hamilton's Gap: 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 Hamilton's Gap 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 Hamilton's Gap will be 17.9°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

Hamilton’s Gap is a rugged west coast beach in the southern part of the Auckland Region, facing directly into the Tasman Sea. It is a remote and largely undeveloped stretch of coastline, popular with surfers and fishers rather than casual swimmers. Sea temperatures here are similar to other west coast beaches in the upper North Island. In summer, particularly from January to March, the water usually ranges between 18 and 21°C. During autumn it cools gradually to around 16 to 19°C. Winter brings noticeably colder conditions, typically between 13 and 15°C, while spring sees a slow climb from about 14 up to 17°C. Strong westerlies and larger swells can mix the water column and cause brief fluctuations in surface temperature.