Nelson Bay — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Nelson Bay (Australia). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Nelson Bay help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Nelson Bay in the Tasman Sea today is 20°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Nelson Bay today is lower than both a week ago and a month ago. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Nelson Bay will be 20.3°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 |
|---|---|---|---|
| JUN 3 | 21.1°C | 20.8°C | |
| JUN 4 | 20.7°C | 20.5°C | |
| JUN 5 | 20.6°C | 20.8°C | |
| JUN 6 | 20.6°C | 20.8°C | |
| JUN 7 | 20.1°C | 20.8°C | |
| JUN 8 | 20.1°C | 20.5°C | |
| JUN 9 | 20.5°C | 20.8°C | |
| JUN 10 | 20.0°C | 20.8°C | |
| JUN 11 | 20.3°C | 20.8°C | 20.3°C |
| JUN 12 | 20.5°C | 20.3°C | |
| JUN 13 | 20.8°C | 20.3°C | |
| JUN 14 | 20.5°C | 20.3°C | |
| JUN 15 | 20.8°C | 20.3°C | |
| JUN 16 | 20.8°C | 20.3°C | |
| JUN 17 | 20.5°C | 20.3°C | |
| JUN 18 | 21.0°C | 20.3°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Nelson Bay, tucked into the Port Stephens estuary on the New South Wales coast, offers a mix of sheltered waters and exposed beaches that influence local sea temperatures. Seasonal surface temperatures typically rise to around 20–24°C in the summer months, ease down to roughly 18–22°C through autumn, drop to about 15–18°C in winter and generally sit near 17–21°C in spring. These ranges reflect the bay’s semi-protected nature, where shallower areas warm more quickly in summer and cool faster in winter than the open ocean. Short-term fluctuations are common with weather, tide and wind changes, so onshore sea breezes or prolonged calm conditions can make the water feel noticeably warmer or cooler than the seasonal averages.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 20°C | 23°C | 27°C |
| February | 21°C | 24°C | 27°C |
| March | 20°C | 24°C | 26°C |
| April | 21°C | 23°C | 25°C |
| May | 19°C | 22°C | 25°C |
| June | 17°C | 21°C | 22°C |
| July | 16°C | 20°C | 21°C |
| August | 17°C | 19°C | 21°C |
| September | 16°C | 19°C | 22°C |
| October | 17°C | 20°C | 22°C |
| November | 18°C | 20°C | 24°C |
| December | 18°C | 21°C | 27°C |
* Click on a month to view detailed water temperature data.
Nelson Bay: Weather Forecast
June 12
June 13
June 14
June 15
Location, Beaches & Local Information
Nearby Beaches & Facilities
Nelson Bay Marina
Bagnalls
Nelson Bay
Shoal Bay
Conroy
Corlette
Corrie Island
Fingal Bay
Wreck Beach
Swimming Conditions
Swimming around Nelson Bay suits a variety of beach holiday styles, from family paddling in sheltered coves to snorkelling and shore dives around rocky headlands. Popular sandy spots tend to be patrolled in peak season, making them safer for casual swimmers, while calm arms of the estuary are ideal for children and less confident swimmers. Water clarity is often good for snorkelling in rocky or seagrass areas, though a wetsuit or spring suit is advisable once temperatures fall below about 18°C for extended immersion. Visitors should also be aware of occasional bluebottle or jellyfish sightings and exercise caution near surf entrances and rocky outcrops, but overall Nelson Bay provides accessible, varied swimming opportunities throughout the year.