Water temperature in Portland Harbour in December

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Is it warm enough to swim in Portland Harbour in December? Average water temperature in Portland Harbour in December is 11°C and therefore is not suitable for comfortable swimming. The warmest sea in Portland Harbour in December is 13.1°C, and the coldest is 8.1°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Portland Harbour

Changes water temperature in Portland Harbour in December 2024, 2023

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

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2024	2023	Min	Max
1 December	12.7°C	12°C	10.8°C	13.1°C
2 December	12.6°C	12°C	10.7°C	13°C
3 December	12.4°C	11.8°C	10.6°C	13.1°C
4 December	12.3°C	11.9°C	10.5°C	12.9°C
5 December	12.8°C	11.6°C	10.1°C	12.8°C
6 December	12.7°C	11.5°C	10.2°C	12.7°C
7 December	12.6°C	11.2°C	10.3°C	12.8°C
8 December	12.3°C	11.2°C	9.4°C	12.3°C
9 December	12.1°C	11.4°C	9.5°C	12.1°C
10 December	12°C	11.5°C	9.6°C	12.1°C
11 December	11.9°C	11.4°C	9.7°C	12°C
12 December	11.8°C	11.3°C	9.5°C	11.9°C
13 December	11.7°C	11.2°C	9.2°C	12°C
14 December	11.6°C	11.1°C	9.3°C	12°C
15 December	10.9°C	10.6°C	9.3°C	12°C

Day	2024	2023	Min	Max
16 December	11.5°C	10.3°C	9°C	11.9°C
17 December	11.3°C	10.5°C	9°C	12.1°C
18 December	11.5°C	10.5°C	8.9°C	12°C
19 December	11.3°C	11°C	8.5°C	12.2°C
20 December	11°C	10.4°C	8.7°C	12°C
21 December	11°C	10.7°C	8.6°C	11.9°C
22 December	11°C	10.9°C	8.5°C	11.8°C
23 December	10.6°C	10.8°C	8.6°C	11.6°C
24 December	10.8°C	10.7°C	8.1°C	11.6°C
25 December	10°C	10.7°C	8.2°C	11.5°C
26 December	9.8°C	10.6°C	8.2°C	11.4°C
27 December	9.7°C	11°C	8.3°C	11.4°C
28 December	9.7°C	10.7°C	8.3°C	11.6°C
29 December	9.7°C	11.2°C	8.4°C	11.8°C
30 December	9.8°C	11.1°C	8.2°C	11.6°C
31 December	9.8°C	11.1°C	8.3°C	11.5°C

Portland Harbour water temp chart in December

Average water temperature in Portland Harbour in December over a decade

2015	2016	2017	2018	2019
12°C	11.4°C	11°C	11.3°C	10.8°C

2020	2021	2022	2023	2024
11.3°C	10.9°C	11°C	11.1°C	11.3°C

Portland Harbour sea state in December

Chart comparing the height of waves in Portland Harbour in December 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 Portland Harbour in December

Portland Harbour 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 December. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Kimmeridge	10.9°C	7.9°C	13.2°C
Swanage	10.6°C	7.5°C	13.1°C
Poole	10.3°C	7.4°C	12.9°C
Studland	10.6°C	7.4°C	13.1°C
Charmouth	10.9°C	8.1°C	13.2°C
Sandbanks	10.4°C	7.4°C	13°C
Shell Bay	10.4°C	7.4°C	13°C
Knoll Beach	10.4°C	7.4°C	13°C
Canford Cliffs	10.4°C	7.4°C	13°C
Bournemouth	10.4°C	7.3°C	12.9°C

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Our report for Portland Harbour 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