Water temperature in Osmington Mills in September

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Is it warm enough to swim in Osmington Mills in September? Average water temperature in Osmington Mills in September is 17.3°C and therefore is not suitable for comfortable swimming. The warmest sea in Osmington Mills in September is 19.6°C, and the coldest is 15.8°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Osmington Mills

Changes water temperature in Osmington Mills in September 2025, 2024

To get an accurate forecast for the water temperature in Osmington Mills for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Osmington Mills, 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	18.6°C	18°C	16.8°C	19.2°C
2 September	18.5°C	17.9°C	16.8°C	19.6°C
3 September	18.7°C	18.1°C	16.8°C	19.4°C
4 September	18.4°C	18.2°C	16.8°C	19.1°C
5 September	18.3°C	18.1°C	16.7°C	19.1°C
6 September	18.4°C	18.1°C	16.6°C	19°C
7 September	18.4°C	18°C	16.6°C	18.9°C
8 September	18.6°C	17.9°C	16.4°C	19°C
9 September	18.3°C	18°C	16.6°C	18.8°C
10 September	18.2°C	17.7°C	16.6°C	18.7°C
11 September	18°C	17.5°C	16.3°C	18.9°C
12 September	17.9°C	17.3°C	16.2°C	18.8°C
13 September	17.8°C	17.2°C	16.1°C	18.7°C
14 September	17.6°C	17.1°C	16.2°C	18.7°C
15 September	17.5°C	17.2°C	16.3°C	18.6°C

Day	2025	2024	Min	Max
16 September	17.3°C	17.5°C	16.3°C	18.6°C
17 September	17.2°C	17.5°C	16.1°C	18.5°C
18 September	17.3°C	17.4°C	16.2°C	18.4°C
19 September	17.3°C	17.6°C	16.3°C	18.3°C
20 September	17.3°C	17.6°C	16.3°C	18.3°C
21 September	17.1°C	17.6°C	16.3°C	18.2°C
22 September		17.5°C	16°C	18.1°C
23 September		17.4°C	16°C	18.3°C
24 September		17.4°C	15.9°C	18.2°C
25 September		17.3°C	16°C	18.1°C
26 September		17.1°C	16°C	18.1°C
27 September		16.9°C	15.9°C	17.8°C
28 September		16.8°C	15.9°C	17.8°C
29 September		16.8°C	15.8°C	17.7°C
30 September		16.7°C	15.9°C	17.6°C

Osmington Mills water temp chart in September

Average water temperature in Osmington Mills in September over a decade

2015	2016	2017	2018	2019
16.5°C	17.6°C	17°C	17.6°C	17.5°C

2020	2021	2022	2023	2024
17.6°C	17.8°C	18.5°C	18.1°C	17.5°C

Osmington Mills sea state in September

Chart comparing the height of waves in Osmington Mills 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 Osmington Mills in September

Osmington Mills 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
Bowleaze Cove	17.2°C	15.8°C	19.5°C
Portland Harbour	17.3°C	15.8°C	19.4°C
West Bay	17.1°C	15.7°C	19.6°C
Burton Bradstock	17.1°C	15.7°C	19.6°C
Poole	17.5°C	15.9°C	19.9°C
Swanage	17.5°C	16°C	20°C
Bridport	17.1°C	15.7°C	19.7°C
Studland	17.6°C	16°C	20°C
Sandbanks	17.6°C	15.9°C	20.1°C
Shell Bay	17.6°C	15.9°C	20.1°C

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Our report for Osmington Mills 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