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Water temperature in Half Moon Bay Beach (VIC) in September

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Is it warm enough to swim in Half Moon Bay Beach in September? Average water temperature in Half Moon Bay Beach in September is 12.3°C and therefore is not suitable for comfortable swimming. The warmest sea in Half Moon Bay Beach in September is 15.4°C, and the coldest is 10.6°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Half Moon Bay Beach

Changes water temperature in Half Moon Bay Beach in September 2025, 2024

To get an accurate forecast for the water temperature in Half Moon Bay Beach for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Half Moon Bay Beach, 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 September11.4°C12.3°C10.6°C12.3°C
2 September11.5°C11.9°C10.6°C12.3°C
3 September11.6°C11.9°C10.7°C12.5°C
4 September11.5°C11.9°C11°C12.5°C
5 September11.6°C11.9°C11°C12.4°C
6 September11.8°C11.9°C11°C12.4°C
7 September12.1°C12.2°C11.3°C12.4°C
8 September12°C12.3°C10.8°C12.4°C
9 September11.9°C12.4°C11°C12.5°C
10 September12.1°C12.4°C11.2°C12.4°C
11 September12.1°C12.6°C11.3°C12.6°C
12 September12.1°C12.6°C11.3°C12.8°C
13 September12.6°C12.5°C11.1°C13.2°C
14 September12.7°C12.5°C11.2°C12.7°C
15 September12.8°C12.6°C11.3°C13.6°C
Day 2025 2024 Min Max
16 September12.8°C12.6°C11.6°C13.5°C
17 September12.6°C12.4°C11.4°C13.5°C
18 September12.8°C12.6°C11.4°C13.4°C
19 September12.6°C12.4°C12.2°C12.7°C
20 September12.6°C12.4°C11.6°C13.6°C
21 September12.5°C12.5°C11.8°C13.6°C
22 September12.4°C12.7°C12.2°C13.3°C
23 September12.5°C12.6°C12.1°C13.8°C
24 September12.6°C12.8°C12.2°C13.8°C
25 September12.7°C12.8°C12°C14.4°C
26 September12.8°C12.8°C12.1°C14.6°C
27 September12.8°C12.9°C12.2°C14.3°C
28 September13°C13°C12.3°C14.8°C
29 September13.2°C12.9°C12.3°C15.4°C
30 September13.4°C13.2°C12.1°C13.4°C
Half Moon Bay Beach water temp chart in September

Average water temperature in Half Moon Bay Beach in September over a decade

20162017201820192020
12.4°C11.5°C11.8°C12°C12.4°C
20212022202320242025
12.6°C12.4°C13.3°C12.5°C12.4°C

Half Moon Bay Beach 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

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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 Half Moon Bay Beach 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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