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December weather forecast in Swansea

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

29 November, sun

	747 mmHg		73%
	7.8 m/s		+15

29 November, Sunday. day, 16°; night, 13°; rain

30 November, mon

	746 mmHg		69%
	8 m/s		+16

30 November, Monday. day, 18°; night, 14°; overcast

1 December, tue

	745 mmHg		67%
	7.5 m/s		+16

1 December, Tuesday. day, 17°; night, 14°; partly cloudy

2 December, wed

	744 mmHg		72%
	8 m/s		+16

2 December, Wednesday. day, 16°; night, 13°; overcast

3 December, thu

	745 mmHg		68%
	7 m/s		+16

3 December, Thursday. day, 16°; night, 12°; overcast

4 December, fri

	746 mmHg		68%
	7.6 m/s		+15

4 December, Friday. day, 14°; night, 11°; overcast

5 December, sat

	746 mmHg		70%
	7 m/s		+16

5 December, Saturday. day, 15°; night, 13°; overcast

6 December, sun

	746 mmHg		74%
	7.4 m/s		+16

6 December, Sunday. day, 15°; night, 13°; overcast

7 December, mon

	743 mmHg		68%
	7.1 m/s		+16

7 December, Monday. day, 17°; night, 15°; clear

8 December, tue

	741 mmHg		66%
	8.6 m/s		+17

8 December, Tuesday. day, 18°; night, 14°; rain

9 December, wed

	742 mmHg		60%
	8.8 m/s		+15

9 December, Wednesday. day, 16°; night, 13°; clear

10 December, thu

	744 mmHg		61%
	8 m/s		+15

10 December, Thursday. day, 16°; night, 12°; partly cloudy

11 December, fri

	746 mmHg		64%
	7 m/s		+16

11 December, Friday. day, 16°; night, 13°; partly cloudy

12 December, sat

	747 mmHg		61%
	7.9 m/s		+16

12 December, Saturday. day, 18°; night, 15°; partly cloudy

13 December, sun

	745 mmHg		62%
	8 m/s		+16

13 December, Sunday. day, 19°; night, 14°; partly cloudy

14 December, mon

	745 mmHg		68%
	7 m/s		+16

14 December, Monday. day, 17°; night, 14°; clear

15 December, tue

	744 mmHg		62%
	6.8 m/s		+17

15 December, Tuesday. day, 19°; night, 15°; partly cloudy

16 December, wed

	744 mmHg		67%
	6.8 m/s		+16

16 December, Wednesday. day, 17°; night, 14°; partly cloudy

17 December, thu

	743 mmHg		68%
	7.6 m/s		+16

17 December, Thursday. day, 16°; night, 13°; overcast

18 December, fri

	742 mmHg		63%
	8 m/s		+17

18 December, Friday. day, 19°; night, 15°; overcast

19 December, sat

	742 mmHg		64%
	9.1 m/s		+16

19 December, Saturday. day, 19°; night, 14°; rain

20 December, sun

	745 mmHg		61%
	7.3 m/s		+17

20 December, Sunday. day, 17°; night, 13°; clear

21 December, mon

	747 mmHg		63%
	6.3 m/s		+17

21 December, Monday. day, 18°; night, 15°; partly cloudy

22 December, tue

	745 mmHg		67%
	7.5 m/s		+17

22 December, Tuesday. day, 19°; night, 15°; rain

23 December, wed

	746 mmHg		62%
	7 m/s		+17

23 December, Wednesday. day, 19°; night, 15°; partly cloudy

24 December, thu

	745 mmHg		66%
	7.5 m/s		+17

24 December, Thursday. day, 19°; night, 15°; rain

25 December, fri

	745 mmHg		68%
	6.9 m/s		+17

25 December, Friday. day, 17°; night, 14°; partly cloudy

26 December, sat

	746 mmHg		62%
	7.4 m/s		+17

26 December, Saturday. day, 19°; night, 15°; clear

27 December, sun

	746 mmHg		64%
	7.3 m/s		+18

27 December, Sunday. day, 20°; night, 16°; partly cloudy

28 December, mon

	743 mmHg		62%
	8.3 m/s		+18

28 December, Monday. day, 19°; night, 14°; partly cloudy

29 December, tue

	744 mmHg		61%
	7.1 m/s		+18

29 December, Tuesday. day, 18°; night, 15°; clear

30 December, wed

	742 mmHg		55%
	6.8 m/s		+19

30 December, Wednesday. day, 22°; night, 17°; partly cloudy

31 December, thu

	742 mmHg		55%
	6.8 m/s		+19

31 December, Thursday. day, 22°; night, 17°; clear

1 January, fri

	741 mmHg		62%
	8.5 m/s		+18

1 January, Friday. day, 20°; night, 14°; rain

2 January, sat

	744 mmHg		63%
	9 m/s		+17

2 January, Saturday. day, 17°; night, 13°; partly cloudy

Average data for 10 years

Swansea December

7

sunny days

4

days with precipitation

20

cloudy days

7 sunny days; 4 days with precipitation; 20 cloudy days;

64

%

air humidity

5.3

m/s

WindNW

38

mm of precipitation

(9% of annual average)

+17

°C

Water temperature

air humidity 64%; 38 millimeters of precipitation (9% of annual average); Wind north-westerly 5.3 Meters per second; Water temperature +17°

Weather graphs for December

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

NW

SW

SW

S

SW

NE

N

NW

NW

W

NW

NW

NE

NE

N

N

N

N

SW

SW

N

NW

NW

NE

SW

NW

N

NW

NW

NW

NW

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Melbourne
Hobart
Devonport
Burnie
Apollo Bay
Sale
Cowes
Strahan
Geelong

Cities with similar weather in December

Alanya
Side
Tunis
Belek
Paphos
Jerba
Aqaba
Eylat
Sousse

The weather forecast for December 2025 is based on historical data from the past 10 years.

In December, the weather in Swansea is typically warm. Average daily high temperature in December is about 18 degrees above zero. On average, Swansea has 13 partly cloudy, 7 sunny, 7 cloudy, and 4 rainy days in December. The rains are usually light.

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