Cascade – current water temperature and swimming conditions

Water Temperature in Cascade: 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 Cascade 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 Cascade 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

Cascade sits on the northern side of Norfolk Island, where the Pacific Ocean meets a small coastal settlement and boat landing area. Sea temperatures here reflect the island’s mild subtropical climate and remain relatively comfortable throughout the year. In summer, from December to February, the water usually reaches around 23–25 °C, which feels warm and inviting for swimming. Autumn brings a gentle cooling to about 21–23 °C, while winter is cooler but still swimmable at roughly 19–21 °C. During spring, the sea gradually warms again, typically sitting between 21–23 °C as weather conditions become more settled.