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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.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
1 September12.1°C12.8°C11°C13.4°C
2 September12.2°C12.7°C11°C13.8°C
3 September12.3°C12.6°C11°C13.8°C
4 September12.2°C12.7°C11.3°C13.8°C
5 September12°C12.7°C11.6°C13.7°C
6 September12.6°C12.7°C11.7°C13.7°C
7 September12.9°C12.8°C11.7°C13.6°C
8 September12.8°C12.7°C11.6°C13.3°C
9 September12.6°C12.7°C11.3°C13.5°C
10 September12.5°C12.7°C11.5°C13.4°C
11 September12.7°C13°C12.1°C13.3°C
12 September12.5°C12.9°C11.9°C13.3°C
13 September13°C12.8°C12.1°C13.3°C
14 September13°C12.8°C12.1°C13.5°C
15 September13.1°C12.9°C12.1°C14°C
Day 2025 2024 Min Max
16 September13.4°C12.9°C12.1°C14.3°C
17 September13.3°C12.6°C12.2°C14.2°C
18 September13.4°C12.7°C12.3°C14.6°C
19 September13.3°C12.7°C12.3°C14.9°C
20 September13.3°C12.7°C12.4°C14.6°C
21 September13.2°C12.8°C12.5°C14.2°C
22 September13.2°C12.7°C12.4°C14.1°C
23 September13.2°C12.8°C12.4°C14.1°C
24 September13.2°C12.9°C12.5°C14.6°C
25 September13.3°C13°C12.6°C14.6°C
26 September 13°C12.1°C14.8°C
27 September 13.3°C12.6°C14.8°C
28 September 13.6°C12.6°C15.2°C
29 September 13.4°C12.6°C15.4°C
30 September 13.7°C12.6°C15.6°C
Western Port Bay water temp chart in September

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

20152016201720182019
12.4°C12.8°C12.4°C12.5°C12.5°C
20202021202220232024
12.6°C13°C12.7°C13.8°C12.9°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

Where is the warm sea water in September?

Want to know where the water temperature in September is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

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

AvrMinMax
Hastings12.8°C11°C15.6°C
Balnarring12.8°C11.5°C15.1°C
Point Leo12.9°C11.7°C14.9°C
Shoreham12.9°C11.7°C14.9°C
Merricks Beach12.9°C11.7°C14.9°C
Surf Beach12.9°C11.4°C15.1°C
Corinella12.8°C11.2°C15.6°C
Mount Martha12.3°C10.5°C14.9°C
Mornington12.3°C10.4°C14.8°C
Mount Eliza12.3°C10.4°C14.8°C

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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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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