Cascade – current water temperature and swimming conditions
This page shows the current water temperature at Cascade in Norfolk Island. You can view recent sea temperature trends on a 30-day chart, check typical monthly water temperature ranges, and compare today’s reading with historical averages for this date. The page also includes a 7-day water temperature forecast, nearby beaches with similar conditions, local weather information, and a summary of swimming conditions to help you assess how suitable the water is for swimming.
Current Sea Water Temperature
The average sea water temperature today in Cascade is about 22°C.
Water Temperature in Cascade: Daily Trends, Historical Records, and Forecast
✅ This water feels mild to warm and is comfortable for the majority of swimmers. Swimming is enjoyable, though longer stays may feel cooler for some people, especially in windy conditions. These temperatures are well suited to family outings and active swimming, particularly on warm days.
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 22.3°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Apr 28 | 22.6°C | 22.8°C | |
| Apr 29 | 22.4°C | 23.0°C | |
| Apr 30 | 22.2°C | 22.3°C | |
| May 1 | 22.1°C | 22.5°C | |
| May 2 | 21.8°C | 22.3°C | |
| May 3 | 21.7°C | 22.8°C | |
| May 4 | 21.8°C | 22.3°C | |
| May 5 | 21.7°C | 21.8°C | |
| May 6 | 21.8°C | 21.8°C | 21.8°C |
| May 7 | 22.0°C | 21.9°C | |
| May 8 | 21.8°C | 21.9°C | |
| May 9 | 22.8°C | 22.0°C | |
| May 10 | 22.8°C | 22.1°C | |
| May 11 | 22.0°C | 22.2°C | |
| May 12 | 22.5°C | 22.2°C | |
| May 13 | 22.0°C | 22.3°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual near-shore water temperatures in Cascade can vary by several degrees from the values shown, particularly after heavy rain, strong southerlies, or prolonged windy conditions. Certain wind patterns can trigger upwelling, where cooler, deeper water is pushed to the surface and replaces the warmer top layer, leading to noticeable short-term changes in water temperature.
Our water temperature forecast is produced using a proprietary mathematical model that combines real-time measurements with long-term historical patterns, local weather conditions, wind strength and direction, and air temperature specific to each coastal region. To improve accuracy, we cross-check data from nearby locations and use multiple sources, including offshore buoys, satellite-based sea surface maps, and observations provided by local authorities.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
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.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 21°C | 23°C | 26°C |
| February | 22°C | 24°C | 26°C |
| March | 22°C | 24°C | 26°C |
| April | 21°C | 23°C | 25°C |
| May | 19°C | 22°C | 24°C |
| June | 18°C | 21°C | 22°C |
| July | 17°C | 20°C | 21°C |
| August | 17°C | 19°C | 21°C |
| September | 17°C | 19°C | 21°C |
| October | 17°C | 20°C | 22°C |
| November | 19°C | 21°C | 23°C |
| December | 20°C | 22°C | 25°C |
* Click on a month to view detailed water temperature data.
Cascade: Weather Forecast
May 7
May 8
May 9
Local Water Conditions and Nearby Spots
Nearby Beaches and Water Temperatures
Emily Bay
Swimming Conditions
Swimming at Cascade is allowed, but opportunities are limited by local conditions rather than water temperature. The coastline here is rocky and exposed, and the area is primarily used as a working boat landing rather than a beach. Swell, surge, and changing conditions are common, which means swimming is generally only suitable on very calm days and for confident, experienced swimmers. There are no gently sloping sandy areas, so entry and exit can be challenging. Even though the water temperature is pleasant for much of the year, many visitors choose more sheltered spots elsewhere on the island for swimming. Overall, Cascade offers swimmable water temperatures year-round, but practical swimming depends heavily on calm seas and careful assessment of local conditions.