Water temperature in Western Port Bay (VIC) in September

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Is it warm enough to swim in Western Port Bay in September? Average water temperature in Western Port Bay in September is 12.8°C and therefore is not suitable for comfortable swimming. The warmest sea in Western Port Bay in September is 15.6°C, and the coldest is 11°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Western Port Bay

Changes water temperature in Western Port Bay in September 2025, 2024

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

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 September	12.1°C	12.8°C	11°C	13.4°C
2 September	12.2°C	12.7°C	11°C	13.8°C
3 September	12.3°C	12.6°C	11°C	13.8°C
4 September	12.2°C	12.7°C	11.3°C	13.8°C
5 September		12.7°C	11.6°C	13.7°C
6 September		12.7°C	11.7°C	13.7°C
7 September		12.8°C	11.7°C	13.6°C
8 September		12.7°C	11.6°C	13.3°C
9 September		12.7°C	11.3°C	13.5°C
10 September		12.7°C	11.5°C	13.4°C
11 September		13°C	12.1°C	13.3°C
12 September		12.9°C	11.9°C	13.3°C
13 September		12.8°C	12.1°C	13.3°C
14 September		12.8°C	12.1°C	13.5°C
15 September		12.9°C	12.1°C	14°C

Day	2024	Min	Max
16 September	12.9°C	12.1°C	14.3°C
17 September	12.6°C	12.2°C	14.2°C
18 September	12.7°C	12.3°C	14.6°C
19 September	12.7°C	12.3°C	14.9°C
20 September	12.7°C	12.4°C	14.6°C
21 September	12.8°C	12.5°C	14.2°C
22 September	12.7°C	12.4°C	14.1°C
23 September	12.8°C	12.4°C	14.1°C
24 September	12.9°C	12.5°C	14.6°C
25 September	13°C	12.6°C	14.6°C
26 September	13°C	12.1°C	14.8°C
27 September	13.3°C	12.6°C	14.8°C
28 September	13.6°C	12.6°C	15.2°C
29 September	13.4°C	12.6°C	15.4°C
30 September	13.7°C	12.6°C	15.6°C

Western Port Bay water temp chart in September

Average water temperature in Western Port Bay in September over a decade

2015	2016	2017	2018	2019
12.4°C	12.8°C	12.4°C	12.5°C	12.5°C

2020	2021	2022	2023	2024
12.6°C	13°C	12.7°C	13.8°C	12.9°C

Western Port Bay sea state in September

Chart comparing the height of waves in Western Port Bay in September 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.

Waves height in Western Port Bay in September

Western Port Bay 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 September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Hastings	12.8°C	11°C	15.6°C
Balnarring	12.8°C	11.5°C	15.1°C
Point Leo	12.9°C	11.7°C	14.9°C
Shoreham	12.9°C	11.7°C	14.9°C
Merricks Beach	12.9°C	11.7°C	14.9°C
Surf Beach	12.9°C	11.4°C	15.1°C
Corinella	12.8°C	11.2°C	15.6°C
Mount Martha	12.3°C	10.5°C	14.9°C
Mornington	12.3°C	10.4°C	14.8°C
Mount Eliza	12.3°C	10.4°C	14.8°C

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Our report for Western Port Bay 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.

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Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature