Swansea weather in July

In July, Swansea sees average daytime highs of 18°C and overnight lows near 14°C, with 86 mm of rain across 13.8 wet days and about 15.9 hours of daylight. It is the 2nd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 18°C through the month. The sky is clear or mostly clear about 22% of the time in July, and the air most often feels comfortable.

Daylight stretches from about 16 h 24 min at the start of July to 15 h 18 min by month's end. Set against the rest of the year, July is Swansea's 2nd-clearest and 11th-windiest month. For the whole year in context, see Swansea's year-round climate.

Daytime high: 18°; 2nd warmest
Overnight low: 14°; 11th coldest
Rainfall: 86 mm; 13.8 wet days
Daylight: 16 hours; 4:22 AM – 8:21 PM
Cloud cover: 65%; 2nd clearest
Wind: 18 km/h; 11th windiest
Solar energy: 5.32 kWh/m²
Travel score: 5.2; out of 10

Swansea is city in Wales.

Air quality: Good; PM2.5 9.9 µg/m³ · 2019
Founded: 1158

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← June Swansea year-round climate August →Best places to visit in July

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 18°C through the month.

A typical July day in Swansea reaches about 18°C in the afternoon and slips back to 14°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 20°C. Set against its neighbours, July runs about 2°C warmer than June and on par with August.

	1	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
Avg high (°C)	17	17	17	17	17	17	17	17	17	17	17	17	17	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18
Avg low (°C)	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	15	15

	Avg high (°C)	Avg low (°C)
1	17	14
2	17	14
3	17	14
4	17	14
5	17	14
6	17	14
7	17	14
8	17	14
9	17	14
10	17	14
11	17	14
12	17	14
13	17	14
14	18	14
15	18	14
16	18	14
17	18	14
18	18	14
19	18	14
20	18	15
21	18	15
22	18	15
23	18	15
24	18	15
25	18	15
26	18	15
27	18	15
28	18	15
29	18	15
30	18	15
31	18	15

Swansea weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	8° / 5°	128	17	0.4	8.1	1.1
Feb	8° / 5°	90	13	0.6	9.6	1.1
Mar	9° / 6°	83	13.7	0.3	11.5	1.6
Apr	11° / 7°	69	12	0.1	13.6	2.5
May	13° / 10°	72	12.4	0	15.3	3.6
Jun	16° / 12°	79	12.2	0	16.3	4.6
Jul	18° / 14°	86	13.8	0	15.9	5.2
Aug	18° / 15°	101	14.3	0	14.4	5.2
Sep	17° / 13°	96	13.2	0	12.4	4.8
Oct	14° / 11°	143	16.7	0	10.4	3.4
Nov	11° / 8°	143	17.3	0	8.6	2.2
Dec	9° / 6°	145	16.8	0.3	7.7	1.4

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 20% of July, with mostly cloudy or overcast conditions the remaining 58%.

	1	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
Clearer (%)	40	40	39	39	39	39	40	39	40	40	41	41	42	43	44	44	44	44	45	45	45	45	44	44	44	43	43	43	41	40	40
Cloudier (%)	60	60	61	61	61	61	60	61	60	60	59	59	58	57	56	56	56	56	55	55	55	55	56	56	56	57	57	57	59	60	60

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	39	61
4	39	61
5	39	61
6	39	61
7	40	60
8	39	61
9	40	60
10	40	60
11	41	59
12	41	59
13	42	58
14	43	57
15	44	56
16	44	56
17	44	56
18	44	56
19	45	55
20	45	55
21	45	55
22	45	55
23	44	56
24	44	56
25	44	56
26	43	57
27	43	57
28	43	57
29	41	59
30	40	60
31	40	60

Chance of precipitation in July

Any precipitation

Swansea gets around 86 mm of rain over 13.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 46% on the wettest days.

	1	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
Rain chance (%)	46	46	46	46	46	46	46	46	45	45	45	44	44	44	43	43	43	42	42	42	42	43	43	43	43	44	44	44	45	45	45

	Rain chance (%)
1	46
2	46
3	46
4	46
5	46
6	46
7	46
8	46
9	45
10	45
11	45
12	44
13	44
14	44
15	43
16	43
17	43
18	42
19	42
20	42
21	42
22	43
23	43
24	43
25	43
26	44
27	44
28	44
29	45
30	45
31	45

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the comfortable band about 48% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	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
Dry (%)	61	59	58	57	56	55	53	52	52	51	49	48	47	46	46	45	44	43	42	41	40	39	38	37	36	35	35	34	34	34	35
Comfortable (%)	37	38	39	40	41	42	43	44	44	45	46	46	47	47	48	49	49	50	50	51	51	52	53	54	54	55	55	56	56	55	54
Humid (%)	2	3	3	3	3	3	4	4	4	4	5	5	6	6	6	7	7	8	8	8	9	9	9	9	10	10	10	10	10	11	11

	Dry (%)	Comfortable (%)	Humid (%)
1	61	37	2
2	59	38	3
3	58	39	3
4	57	40	3
5	56	41	3
6	55	42	3
7	53	43	4
8	52	44	4
9	52	44	4
10	51	45	4
11	49	46	5
12	48	46	5
13	47	47	6
14	46	47	6
15	46	48	6
16	45	49	7
17	44	49	7
18	43	50	8
19	42	50	8
20	41	51	8
21	40	51	9
22	39	52	9
23	38	53	9
24	37	54	9
25	36	54	10
26	35	55	10
27	35	55	10
28	34	56	10
29	34	56	10
30	34	55	11
31	35	54	11

Wind in July

Winds average 18 km/h in July.

Across July, daily wind ranges from about 18 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

	1	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
Wind speed (km/h)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	18	light breeze
2	18	light breeze
3	18	light breeze
4	18	light breeze
5	18	light breeze
6	18	light breeze
7	18	light breeze
8	18	light breeze
9	18	light breeze
10	18	light breeze
11	18	light breeze
12	18	light breeze
13	18	light breeze
14	18	light breeze
15	18	light breeze
16	18	light breeze
17	18	light breeze
18	18	light breeze
19	18	light breeze
20	18	light breeze
21	18	light breeze
22	18	light breeze
23	18	light breeze
24	18	light breeze
25	18	light breeze
26	18	light breeze
27	18	light breeze
28	18	light breeze
29	18	light breeze
30	18	light breeze
31	18	light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 16 h 24 min at the start of July to 15 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over July. Sunrise moves from 4:08 AM to 4:42 AM, and sunset from 8:30 PM to 8:02 PM.

	1	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
Daylight (h)	16.4	16.4	16.3	16.3	16.3	16.3	16.3	16.2	16.2	16.2	16.1	16.1	16.1	16.1	16.0	16.0	16.0	15.9	15.9	15.8	15.8	15.8	15.7	15.7	15.6	15.6	15.5	15.5	15.4	15.4	15.3
Sunrise (AM)	4:08	4:09	4:09	4:10	4:11	4:12	4:13	4:13	4:14	4:15	4:16	4:17	4:18	4:19	4:21	4:22	4:23	4:24	4:25	4:27	4:28	4:29	4:31	4:32	4:33	4:35	4:36	4:38	4:39	4:41	4:42
Sunset (PM)	8:30	8:30	8:30	8:29	8:29	8:28	8:28	8:27	8:27	8:26	8:25	8:25	8:24	8:23	8:22	8:21	8:20	8:19	8:18	8:17	8:16	8:14	8:13	8:12	8:11	8:09	8:08	8:06	8:05	8:03	8:02

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	16.4	4:08	8:30
2	16.4	4:09	8:30
3	16.3	4:09	8:30
4	16.3	4:10	8:29
5	16.3	4:11	8:29
6	16.3	4:12	8:28
7	16.3	4:13	8:28
8	16.2	4:13	8:27
9	16.2	4:14	8:27
10	16.2	4:15	8:26
11	16.1	4:16	8:25
12	16.1	4:17	8:25
13	16.1	4:18	8:24
14	16.1	4:19	8:23
15	16.0	4:21	8:22
16	16.0	4:22	8:21
17	16.0	4:23	8:20
18	15.9	4:24	8:19
19	15.9	4:25	8:18
20	15.8	4:27	8:17
21	15.8	4:28	8:16
22	15.8	4:29	8:14
23	15.7	4:31	8:13
24	15.7	4:32	8:12
25	15.6	4:33	8:11
26	15.6	4:35	8:09
27	15.5	4:36	8:08
28	15.5	4:38	8:06
29	15.4	4:39	8:05
30	15.4	4:41	8:03
31	15.3	4:42	8:02

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.32 kWh/m².

For context, solar energy here swings from a low near 0.65 kWh/m² to a high of 5.63 kWh/m² in June across the year — July's 5.32 kWh/m² sits near the top of that range.

	1	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
Solar energy (kWh/m²)	5.6	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.3	5.3	5.3	5.3	5.3	5.2	5.2	5.2	5.1	5.1	5.1	5.0	5.0	5.0
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.6	Bright
2	5.5	Bright
3	5.5	Bright
4	5.5	Bright
5	5.5	Bright
6	5.5	Bright
7	5.5	Bright
8	5.5	Bright
9	5.5	Bright
10	5.4	Bright
11	5.4	Bright
12	5.4	Bright
13	5.4	Bright
14	5.4	Bright
15	5.4	Bright
16	5.4	Bright
17	5.4	Bright
18	5.3	Bright
19	5.3	Bright
20	5.3	Bright
21	5.3	Bright
22	5.3	Bright
23	5.2	Bright
24	5.2	Bright
25	5.2	Bright
26	5.1	Bright
27	5.1	Bright
28	5.1	Bright
29	5.0	Bright
30	5.0	Bright
31	5.0	Bright

Planning a trip in July

Is July a good time to visit Swansea?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.2

Sightseeing

1st-best month of the year

1.5

Beach & pool

2nd-best month of the year

July is a reasonable time to visit Swansea for sightseeing.

What to pack for Swansea in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Swansea sees daytime highs around 18°C and nights near 14°C. Worth packing: rain gear and sun protection. About 14 days see rain.

rain gearsun protection

Sea temperature near Swansea in July

The nearest coast averages about 16°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 18°C and coldest in February near 8°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	8	8	8	9	11	14	16	18	17	15	12	10
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	8	Bracing
Feb	8	Bracing
Mar	8	Bracing
Apr	9	Bracing
May	11	Bracing
Jun	14	Bracing
Jul	16	Cool
Aug	18	Cool
Sep	17	Cool
Oct	15	Cool
Nov	12	Bracing
Dec	10	Bracing

UV index in Swansea in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Swansea peaks around August 13 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	3	4	6	6	6	7	4	2	1	1
Level	Low	Low	Moderate	Moderate	High	High	High	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	4	Moderate
May	6	High
Jun	6	High
Jul	6	High
Aug	7	High
Sep	4	Moderate
Oct	2	Moderate
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Swansea?

Swansea sits at 51.6°N, 3.9°W, 18 m above sea level, in United Kingdom. The nearest listed city is Clydach, 8.0 km away.

Topography around Swansea

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Swansea.

Within 3 km, the terrain around Swansea has only modest variations in elevation — a maximum elevation change of 194 m around an average of 44 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 422 m; within 80 km, large variations in elevation — a maximum elevation change of 878 m.

The land around Swansea is covered by artificial surfaces (34%), water (32%) and trees (23%) within 3 km, water (35%), grassland (28%) and trees (26%) within 16 km, and grassland (46%) and water (35%) within 80 km.

3 km

194 m

artificial surfaces 34%

16 km

422 m

water 35%

80 km

878 m

grassland 46%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← June Swansea year-round climate August →Best places to visit in July

July weather nearby: Clydach 8.0 km · Briton Ferry 9.0 km · Gorseinon 9.0 km · Neath 11 km · Llanelli 17 km · Ammanford 19 km · Maesteg 20 km · Porthcawl 23 km

United Kingdom travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type D / G / M; 230 V · 50 Hz
Prices: ≈ 89% of US; price level, 2025
GDP per capita: $57,602; 2025
Happiness: 6.7 / 10; World Happiness, 2025
Safe drinking water: 100%; of population, 2024
Homicide rate: 1.1; per 100k, 2021
Road deaths: 3.2; per 100k/yr, 2019
Income group: High; World Bank
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Swansea (51.6208°, -3.9432°, elevation 18 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	17	14
2	17	14
3	17	14
4	17	14
5	17	14
6	17	14
7	17	14
8	17	14
9	17	14
10	17	14
11	17	14
12	17	14
13	17	14
14	18	14
15	18	14
16	18	14
17	18	14
18	18	14
19	18	14
20	18	15
21	18	15
22	18	15
23	18	15
24	18	15
25	18	15
26	18	15
27	18	15
28	18	15
29	18	15
30	18	15
31	18	15

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	39	61
4	39	61
5	39	61
6	39	61
7	40	60
8	39	61
9	40	60
10	40	60
11	41	59
12	41	59
13	42	58
14	43	57
15	44	56
16	44	56
17	44	56
18	44	56
19	45	55
20	45	55
21	45	55
22	45	55
23	44	56
24	44	56
25	44	56
26	43	57
27	43	57
28	43	57
29	41	59
30	40	60
31	40	60

	Rain chance (%)
1	46
2	46
3	46
4	46
5	46
6	46
7	46
8	46
9	45
10	45
11	45
12	44
13	44
14	44
15	43
16	43
17	43
18	42
19	42
20	42
21	42
22	43
23	43
24	43
25	43
26	44
27	44
28	44
29	45
30	45
31	45

	Dry (%)	Comfortable (%)	Humid (%)
1	61	37	2
2	59	38	3
3	58	39	3
4	57	40	3
5	56	41	3
6	55	42	3
7	53	43	4
8	52	44	4
9	52	44	4
10	51	45	4
11	49	46	5
12	48	46	5
13	47	47	6
14	46	47	6
15	46	48	6
16	45	49	7
17	44	49	7
18	43	50	8
19	42	50	8
20	41	51	8
21	40	51	9
22	39	52	9
23	38	53	9
24	37	54	9
25	36	54	10
26	35	55	10
27	35	55	10
28	34	56	10
29	34	56	10
30	34	55	11
31	35	54	11

	Avg high (°C)	Avg low (°C)
1	17	14
2	17	14
3	17	14
4	17	14
5	17	14
6	17	14
7	17	14
8	17	14
9	17	14
10	17	14
11	17	14
12	17	14
13	17	14
14	18	14
15	18	14
16	18	14
17	18	14
18	18	14
19	18	14
20	18	15
21	18	15
22	18	15
23	18	15
24	18	15
25	18	15
26	18	15
27	18	15
28	18	15
29	18	15
30	18	15
31	18	15

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	39	61
4	39	61
5	39	61
6	39	61
7	40	60
8	39	61
9	40	60
10	40	60
11	41	59
12	41	59
13	42	58
14	43	57
15	44	56
16	44	56
17	44	56
18	44	56
19	45	55
20	45	55
21	45	55
22	45	55
23	44	56
24	44	56
25	44	56
26	43	57
27	43	57
28	43	57
29	41	59
30	40	60
31	40	60

	Rain chance (%)
1	46
2	46
3	46
4	46
5	46
6	46
7	46
8	46
9	45
10	45
11	45
12	44
13	44
14	44
15	43
16	43
17	43
18	42
19	42
20	42
21	42
22	43
23	43
24	43
25	43
26	44
27	44
28	44
29	45
30	45
31	45

	Dry (%)	Comfortable (%)	Humid (%)
1	61	37	2
2	59	38	3
3	58	39	3
4	57	40	3
5	56	41	3
6	55	42	3
7	53	43	4
8	52	44	4
9	52	44	4
10	51	45	4
11	49	46	5
12	48	46	5
13	47	47	6
14	46	47	6
15	46	48	6
16	45	49	7
17	44	49	7
18	43	50	8
19	42	50	8
20	41	51	8
21	40	51	9
22	39	52	9
23	38	53	9
24	37	54	9
25	36	54	10
26	35	55	10
27	35	55	10
28	34	56	10
29	34	56	10
30	34	55	11
31	35	54	11

	Avg high (°C)	Avg low (°C)
1	17	14
2	17	14
3	17	14
4	17	14
5	17	14
6	17	14
7	17	14
8	17	14
9	17	14
10	17	14
11	17	14
12	17	14
13	17	14
14	18	14
15	18	14
16	18	14
17	18	14
18	18	14
19	18	14
20	18	15
21	18	15
22	18	15
23	18	15
24	18	15
25	18	15
26	18	15
27	18	15
28	18	15
29	18	15
30	18	15
31	18	15

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	39	61
4	39	61
5	39	61
6	39	61
7	40	60
8	39	61
9	40	60
10	40	60
11	41	59
12	41	59
13	42	58
14	43	57
15	44	56
16	44	56
17	44	56
18	44	56
19	45	55
20	45	55
21	45	55
22	45	55
23	44	56
24	44	56
25	44	56
26	43	57
27	43	57
28	43	57
29	41	59
30	40	60
31	40	60

	Rain chance (%)
1	46
2	46
3	46
4	46
5	46
6	46
7	46
8	46
9	45
10	45
11	45
12	44
13	44
14	44
15	43
16	43
17	43
18	42
19	42
20	42
21	42
22	43
23	43
24	43
25	43
26	44
27	44
28	44
29	45
30	45
31	45

	Dry (%)	Comfortable (%)	Humid (%)
1	61	37	2
2	59	38	3
3	58	39	3
4	57	40	3
5	56	41	3
6	55	42	3
7	53	43	4
8	52	44	4
9	52	44	4
10	51	45	4
11	49	46	5
12	48	46	5
13	47	47	6
14	46	47	6
15	46	48	6
16	45	49	7
17	44	49	7
18	43	50	8
19	42	50	8
20	41	51	8
21	40	51	9
22	39	52	9
23	38	53	9
24	37	54	9
25	36	54	10
26	35	55	10
27	35	55	10
28	34	56	10
29	34	56	10
30	34	55	11
31	35	54	11