Water temperature in Newcastle (NSW) in June

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Is it warm enough to swim in Newcastle in June? Average water temperature in Newcastle in June is 19.5°C and therefore is not suitable for comfortable swimming. The warmest sea in Newcastle in June is 21.1°C, and the coldest is 17.6°C. Average high air temperature in Newcastle in June is 18°C, and average low temperature is 10°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Newcastle

Changes water temperature in Newcastle in June 2025, 2024

To get an accurate forecast for the water temperature in Newcastle for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Newcastle, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of June.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 June	20°C	19.4°C	19.3°C	21.1°C
2 June	19.9°C	19.5°C	19.1°C	21.1°C
3 June	19.8°C	18.6°C	18.6°C	21.1°C
4 June	19.9°C	18.8°C	18.8°C	21°C
5 June	19.5°C	19°C	19°C	20.9°C
6 June	19.4°C	20°C	19.1°C	21.1°C
7 June	19.3°C	20.2°C	19.1°C	20.9°C
8 June	19.2°C	20.3°C	19°C	20.9°C
9 June	19.4°C	20.6°C	18.9°C	20.6°C
10 June	19°C	20.4°C	18.9°C	20.4°C
11 June	19.1°C	20.1°C	18.9°C	20.5°C
12 June	19°C	19.9°C	19°C	20.5°C
13 June	19.5°C	19.7°C	18.7°C	20.4°C
14 June	20.2°C	20.2°C	18.8°C	20.5°C
15 June	20.3°C	20.2°C	18.6°C	20.7°C

Day	2025	2024	Min	Max
16 June	20°C	20.3°C	18.6°C	20.7°C
17 June	18.9°C	19.5°C	18.4°C	20.6°C
18 June	18.6°C	19.6°C	18.5°C	20.5°C
19 June	19°C	19.5°C	18.3°C	20.9°C
20 June	19.2°C	19.6°C	17.6°C	20.5°C
21 June	19.3°C	19.3°C	18.1°C	20.3°C
22 June		19.2°C	18°C	20.2°C
23 June	19.5°C	19°C	18.4°C	19.9°C
24 June	19.5°C	18.5°C	18°C	19.9°C
25 June	19.9°C	18.6°C	18°C	20°C
26 June	19.8°C	18.7°C	17.9°C	19.9°C
27 June	19.6°C	18.9°C	18.1°C	19.9°C
28 June	19.7°C	18.9°C	17.6°C	19.7°C
29 June	19.4°C	18.8°C	18.2°C	19.6°C
30 June	19.2°C	18.6°C	18°C	19.8°C

Average water temperature in Newcastle in June over a decade

2016	2017	2018	2019	2020
20.1°C	20°C	19.1°C	19.9°C	18.9°C

2021	2022	2023	2024	2025
19.3°C	19.5°C	18.7°C	19.5°C	19.5°C

Newcastle sea state in June

Chart comparing the height of waves in Newcastle in June over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Weather and climate in Newcastle in June

This data display average monthly climate indicators in Newcastle in June based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

Average HIGH temperature18°C
Average LOW temperature10°C
Average humidity
63
Average rainfall days12 days
Average rainfall4.6''/117mm

Newcastle water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in June. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Merewether	19.3°C	17.5°C	21°C
Redhead Beach	19.3°C	17.5°C	21.1°C
Stockton	19.2°C	17.1°C	21°C
Eleebana	19.2°C	17.3°C	21°C
Belmont	19.3°C	17.4°C	21.1°C
Rathmines	19.2°C	17.4°C	21°C
Blacksmiths Beach	19.2°C	17.4°C	21°C
Caves Beach	19.2°C	17.4°C	21°C
Catherine Hill Bay	19.2°C	17.4°C	21.1°C
Anna Bay	19.6°C	17.9°C	21.5°C

Newcastle photo gallery

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Our report for Newcastle is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

Region

Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature