Henderson Bay – current water temperature and swimming conditions

Water Temperature in Henderson Bay: Daily Trends, Historical Records, and Forecast

⚠️ Water in this range feels cool but still manageable for many swimmers. Short to moderate swims are comfortable, especially in warm weather. Some people may prefer a wetsuit for longer stays, particularly when swimming actively or outside peak summer conditions.

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 Henderson Bay 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 Henderson Bay will be 18.6°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

Henderson Bay lies along the eastern side of the Far North in the Northland Region, facing the Pacific Ocean. This stretch of coastline is open and exposed, with long sandy beaches and rolling surf. Sea temperatures here reflect the relatively warm conditions of the upper North Island. Over summer, from December to February, water temperatures generally range between 19°C and 22°C, making it comfortable for swimming during fine weather. In autumn, the sea often remains around 18–20°C before gradually cooling. Winter temperatures typically sit between 14°C and 16°C, while spring brings a steady rise from about 15°C towards 18°C as the days become longer and more settled.