When to go · United Kingdom

When to go to Swansea

Twelve months of averages for Swansea, and what they say about when to go.

When to go

What the averages say

Mean daily highs and lows and the month's rain, averaged over 2001 to 2020.

On these averages, Swansea has a mean high between 18°C and 32°C and under 150 mm of rain in July and August.

Cold months (a mean high under 10°C): December to March.
The warmest month is July (19°C) and the coolest February (8°C). The wettest is December (125 mm) and the driest April (60 mm); about 1,103 mm of rain falls in a year.

How these sentences are worded

Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.

Swansea: highs, lows and rainHighLowRain

The year at a glance

Mild to warm and dry
Mild to warm, humid or showery
Hot
Cool
Wet
Cold

JanCold
FebCold
MarCold
AprCool
MayCool
JunCool
JulMild–warm, mixed
AugMild–warm, mixed
SeptCool
OctCool
NovCool
DecCold

Month by month

Every month in Swansea

The whole year, with humidity, cloud and the sunlight reaching the ground.

Climate in Swansea by month: mean daily high and low, rain, and what the month is like
Month	High	Low	Rain	Humidity	Cloud	Sunlight (kWh/m²/day)	High in Dubai	What it is like
January	8°C	5°C	112 mm	91%	80%	0.8	23°C	Cold
February	8°C	4°C	86 mm	90%	79%	1.5	24°C	Cold
March	9°C	4°C	80 mm	88%	75%	2.7	27°C	Cold
April	12°C	6°C	60 mm	85%	69%	4.1	31°C	Cool
May	15°C	9°C	71 mm	83%	70%	5	35°C	Cool
June	17°C	12°C	77 mm	84%	71%	5.3	37°C	Cool
July	19°C	14°C	87 mm	84%	70%	5	39°C	Mild to warm, humid or showery
August	19°C	14°C	94 mm	85%	73%	4.2	39°C	Mild to warm, humid or showery
September	17°C	12°C	75 mm	85%	70%	3.2	37°C	Cool
October	14°C	10°C	115 mm	87%	76%	1.8	34°C	Cool
November	11°C	8°C	121 mm	89%	81%	1	29°C	Cool
December	9°C	5°C	125 mm	91%	82%	0.6	25°C	Cold

The Dubai column is Dubai's mean daily high, for comparison.

Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.

When to go nearby

Plan it

Plan a trip to Swansea

Tell us when and who is travelling, and a person puts the flights, the stays and the rest into one quote.

Plan a trip to Swansea More about Swansea When to go

Month

High

Low

Rain

Humidity

Cloud

Sunlight (kWh/m²/day)

High in Dubai

What it is like

January

8°C

5°C

112 mm

91%

80%

0.8

23°C

Cold

February

8°C

4°C

86 mm

90%

79%

1.5

24°C

Cold

March

9°C

4°C

80 mm

88%

75%

2.7

27°C

Cold

April

12°C

6°C

60 mm

85%

69%

4.1

31°C

Cool

May

15°C

9°C

71 mm

83%

70%

35°C

Cool

June

17°C

12°C

77 mm

84%

71%

5.3

37°C

Cool

July

19°C

14°C

87 mm

84%

70%

39°C

Mild to warm, humid or showery

August

19°C

14°C

94 mm

85%

73%

4.2

39°C

Mild to warm, humid or showery

September

17°C

12°C

75 mm

85%

70%

3.2

37°C

Cool

October

14°C

10°C

115 mm

87%

76%

1.8

34°C

Cool

November

11°C

8°C

121 mm

89%

81%

29°C

Cool

December

9°C

5°C

125 mm

91%

82%

0.6

25°C

Cold