Southport weather in September

In September, Southport sees average daytime highs of 16°C and overnight lows near 13°C, with 111 mm of rain across 14.8 wet days and about 12.5 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 15°C by the end. The sky is clear or mostly clear about 14% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Southport's 6th-clearest and 7th-windiest month. For the whole year in context, see Southport's year-round climate.

Daytime high: 16°; 3rd warmest
Overnight low: 13°; 10th coldest
Rainfall: 111 mm; 14.8 wet days
Daylight: 12 h 24 min; 5:54 AM – 6:19 PM
Cloud cover: 70%; 6th clearest
Wind: 21 km/h; 7th windiest
Solar energy: 2.95 kWh/m²
Travel score: 4.3; out of 10

Southport is town in the Metropolitan Borough of Sefton, England.

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

← August Southport year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 17°C in the first days to 15°C by the end.

A typical September day in Southport reaches about 16°C in the afternoon and slips back to 13°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 18°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

	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
Avg high (°C)	17	17	17	17	17	17	17	17	16	16	16	16	16	16	16	16	16	16	16	16	16	16	15	15	15	15	15	15	15	15
Avg low (°C)	14	14	14	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	12	12	12	12	12	12	12	12	12	12	12	12

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

How September really feels in Southport

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Southport weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	7° / 5°	108	17	0.7	7.8	0.8
Feb	7° / 4°	87	14.6	0.6	9.4	0.8
Mar	8° / 5°	81	14.4	0.6	11.5	1.3
Apr	10° / 7°	70	12.8	0.1	13.7	2.2
May	13° / 9°	74	12.6	0	15.6	3.4
Jun	16° / 12°	86	13.5	0	16.7	4.3
Jul	17° / 14°	97	16.1	0	16.3	4.8
Aug	18° / 14°	117	16.8	0	14.6	4.8
Sep	16° / 13°	111	14.8	0	12.5	4.3
Oct	13° / 10°	137	17.3	0	10.3	3.1
Nov	10° / 7°	138	18.4	0.1	8.3	1.8
Dec	8° / 5°	139	17.4	0.5	7.3	1.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 68%.

	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
Clearer (%)	37	37	37	37	36	36	36	35	34	34	34	33	33	33	32	32	30	31	30	30	28	28	28	28	28	28	29	29	29	29
Cloudier (%)	63	63	63	63	64	64	64	65	66	66	66	67	67	67	68	68	70	69	70	70	72	72	72	72	72	72	71	71	71	71

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	36	64
6	36	64
7	36	64
8	35	65
9	34	66
10	34	66
11	34	66
12	33	67
13	33	67
14	33	67
15	32	68
16	32	68
17	30	70
18	31	69
19	30	70
20	30	70
21	28	72
22	28	72
23	28	72
24	28	72
25	28	72
26	28	72
27	29	71
28	29	71
29	29	71
30	29	71

Chance of precipitation in September

Any precipitation

Southport gets around 111 mm of rain over 14.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 50% and peaks near 54% 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
Rain chance (%)	50	50	50	50	50	50	50	50	50	49	49	49	49	48	48	48	48	47	47	47	48	48	49	50	50	51	52	53	53	54

	Rain chance (%)
1	50
2	50
3	50
4	50
5	50
6	50
7	50
8	50
9	50
10	49
11	49
12	49
13	49
14	48
15	48
16	48
17	48
18	47
19	47
20	47
21	48
22	48
23	49
24	50
25	50
26	51
27	52
28	53
29	53
30	54

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 80% 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
Dry (%)	69	70	70	71	71	72	73	73	75	76	77	78	79	80	81	82	82	83	83	84	84	86	86	86	87	87	88	88	89	89
Comfortable (%)	28	27	27	26	26	25	24	24	23	22	21	20	19	18	18	17	17	16	16	15	15	14	14	14	13	13	12	12	11	11
Humid (%)	3	3	3	3	3	3	3	3	2	2	2	2	2	2	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)	Humid (%)
1	69	28	3
2	70	27	3
3	70	27	3
4	71	26	3
5	71	26	3
6	72	25	3
7	73	24	3
8	73	24	3
9	75	23	2
10	76	22	2
11	77	21	2
12	78	20	2
13	79	19	2
14	80	18	2
15	81	18	1
16	82	17	1
17	82	17	1
18	83	16	1
19	83	16	1
20	84	15	1
21	84	15	1
22	86	14	0
23	86	14	0
24	86	14	0
25	87	13	0
26	87	13	0
27	88	12	0
28	88	12	0
29	89	11	0
30	89	11	0

Wind in September

Winds average 21 km/h in September.

Across September, daily wind ranges from about 21 km/h on the calmest days to 23 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
Wind speed (km/h)	21	21	21	21	21	21	21	21	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	23	23	23
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 30 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 126 minutes over September. Sunrise moves from 5:27 AM to 6:19 AM, and sunset from 6:57 PM to 5:43 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
Daylight (h)	13.5	13.4	13.4	13.3	13.2	13.1	13.1	13.0	12.9	12.9	12.8	12.7	12.6	12.6	12.5	12.4	12.3	12.3	12.2	12.1	12.1	12.0	11.9	11.8	11.8	11.7	11.6	11.5	11.5	11.4
Sunrise (AM)	5:27	5:28	5:30	5:32	5:34	5:36	5:37	5:39	5:41	5:43	5:45	5:47	5:48	5:50	5:52	5:54	5:56	5:57	5:59	6:01	6:03	6:05	6:07	6:08	6:10	6:12	6:14	6:16	6:18	6:19
Sunset (PM)	6:57	6:54	6:52	6:49	6:47	6:44	6:42	6:39	6:37	6:34	6:32	6:29	6:27	6:24	6:22	6:19	6:16	6:14	6:11	6:09	6:06	6:04	6:01	5:58	5:56	5:53	5:51	5:48	5:46	5:43

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.5	5:27	6:57
2	13.4	5:28	6:54
3	13.4	5:30	6:52
4	13.3	5:32	6:49
5	13.2	5:34	6:47
6	13.1	5:36	6:44
7	13.1	5:37	6:42
8	13.0	5:39	6:39
9	12.9	5:41	6:37
10	12.9	5:43	6:34
11	12.8	5:45	6:32
12	12.7	5:47	6:29
13	12.6	5:48	6:27
14	12.6	5:50	6:24
15	12.5	5:52	6:22
16	12.4	5:54	6:19
17	12.3	5:56	6:16
18	12.3	5:57	6:14
19	12.2	5:59	6:11
20	12.1	6:01	6:09
21	12.1	6:03	6:06
22	12.0	6:05	6:04
23	11.9	6:07	6:01
24	11.8	6:08	5:58
25	11.8	6:10	5:56
26	11.7	6:12	5:53
27	11.6	6:14	5:51
28	11.5	6:16	5:48
29	11.5	6:18	5:46
30	11.4	6:19	5:43

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.95 kWh/m².

For context, solar energy here swings from a low near 0.51 kWh/m² to a high of 5.43 kWh/m² in June across the year — September's 2.95 kWh/m² falls in the middle.

	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
Solar energy (kWh/m²)	3.6	3.6	3.5	3.5	3.4	3.4	3.3	3.3	3.3	3.2	3.2	3.1	3.1	3.0	3.0	2.9	2.9	2.8	2.8	2.7	2.7	2.6	2.6	2.5	2.5	2.5	2.4	2.4	2.3	2.3
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	3.6	Moderate
2	3.6	Moderate
3	3.5	Moderate
4	3.5	Moderate
5	3.4	Moderate
6	3.4	Moderate
7	3.3	Moderate
8	3.3	Moderate
9	3.3	Moderate
10	3.2	Moderate
11	3.2	Moderate
12	3.1	Moderate
13	3.1	Moderate
14	3.0	Moderate
15	3.0	Moderate
16	2.9	Moderate
17	2.9	Moderate
18	2.8	Moderate
19	2.8	Moderate
20	2.7	Moderate
21	2.7	Moderate
22	2.6	Moderate
23	2.6	Moderate
24	2.5	Moderate
25	2.5	Moderate
26	2.5	Moderate
27	2.4	Moderate
28	2.4	Moderate
29	2.3	Moderate
30	2.3	Moderate

Planning a trip in September

Is September a good time to visit Southport?

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

4.3

Sightseeing

3rd-best month of the year

0.5

Beach & pool

3rd-best month of the year

September is a reasonable time to visit Southport for sightseeing.

What to pack for Southport in September

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

In September, Southport sees daytime highs around 16°C and nights near 13°C. Pack rain gear. Worth having: a warm layer and a windbreaker. About 15 days see rain.

rain geara warm layera windbreaker

Sea temperature near Southport in September

The nearest coast averages about 16°C in September — 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 17°C and coldest in February near 6°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)	7	6	7	9	11	14	16	17	16	14	11	9
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	7	Bracing
Feb	6	Bracing
Mar	7	Bracing
Apr	9	Bracing
May	11	Bracing
Jun	14	Bracing
Jul	16	Cool
Aug	17	Cool
Sep	16	Cool
Oct	14	Bracing
Nov	11	Bracing
Dec	9	Bracing

UV index in Southport in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Southport peaks around August 11 at about 6 (high) — a little sun protection helps at midday. 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 5 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	3	3	5	5	5	6	4	2	1	1
Level	Low	Low	Moderate	Moderate	High	High	High	High	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	3	Moderate
May	5	High
Jun	5	High
Jul	5	High
Aug	6	High
Sep	4	Moderate
Oct	2	Low
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Southport?

Southport sits at 53.6°N, 3.0°W, 9 m above sea level, in United Kingdom. The nearest listed city is Formby, 10 km away.

Topography around Southport

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

Within 3 km, the terrain around Southport has only modest variations in elevation — a maximum elevation change of 20 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 87 m; within 80 km, large variations in elevation — a maximum elevation change of 940 m.

The land around Southport is covered by artificial surfaces (32%) and water (32%) within 3 km, water (43%) and cropland (22%) within 16 km, and grassland (47%) and water (28%) within 80 km.

3 km

20 m

artificial surfaces 32%

16 km

87 m

water 43%

80 km

940 m

grassland 47%

treesgrasslandcroplandartificial surfaceswaterwetland

← August Southport year-round climate October →Best places to visit in September

September weather nearby: Formby 10 km · Lytham St Annes 11 km · Ormskirk 12 km · Maghull 15 km · Skelmersdale 19 km · Blackpool 19 km · Litherland 20 km · Kirkby 20 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 Southport (53.6458°, -3.0101°, elevation 9 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	13
5	17	13
6	17	13
7	17	13
8	17	13
9	16	13
10	16	13
11	16	13
12	16	13
13	16	13
14	16	13
15	16	13
16	16	13
17	16	13
18	16	13
19	16	12
20	16	12
21	16	12
22	16	12
23	15	12
24	15	12
25	15	12
26	15	12
27	15	12
28	15	12
29	15	12
30	15	12

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	36	64
6	36	64
7	36	64
8	35	65
9	34	66
10	34	66
11	34	66
12	33	67
13	33	67
14	33	67
15	32	68
16	32	68
17	30	70
18	31	69
19	30	70
20	30	70
21	28	72
22	28	72
23	28	72
24	28	72
25	28	72
26	28	72
27	29	71
28	29	71
29	29	71
30	29	71

	Rain chance (%)
1	50
2	50
3	50
4	50
5	50
6	50
7	50
8	50
9	50
10	49
11	49
12	49
13	49
14	48
15	48
16	48
17	48
18	47
19	47
20	47
21	48
22	48
23	49
24	50
25	50
26	51
27	52
28	53
29	53
30	54

	Dry (%)	Comfortable (%)	Humid (%)
1	69	28	3
2	70	27	3
3	70	27	3
4	71	26	3
5	71	26	3
6	72	25	3
7	73	24	3
8	73	24	3
9	75	23	2
10	76	22	2
11	77	21	2
12	78	20	2
13	79	19	2
14	80	18	2
15	81	18	1
16	82	17	1
17	82	17	1
18	83	16	1
19	83	16	1
20	84	15	1
21	84	15	1
22	86	14	0
23	86	14	0
24	86	14	0
25	87	13	0
26	87	13	0
27	88	12	0
28	88	12	0
29	89	11	0
30	89	11	0

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

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	36	64
6	36	64
7	36	64
8	35	65
9	34	66
10	34	66
11	34	66
12	33	67
13	33	67
14	33	67
15	32	68
16	32	68
17	30	70
18	31	69
19	30	70
20	30	70
21	28	72
22	28	72
23	28	72
24	28	72
25	28	72
26	28	72
27	29	71
28	29	71
29	29	71
30	29	71

	Rain chance (%)
1	50
2	50
3	50
4	50
5	50
6	50
7	50
8	50
9	50
10	49
11	49
12	49
13	49
14	48
15	48
16	48
17	48
18	47
19	47
20	47
21	48
22	48
23	49
24	50
25	50
26	51
27	52
28	53
29	53
30	54

	Dry (%)	Comfortable (%)	Humid (%)
1	69	28	3
2	70	27	3
3	70	27	3
4	71	26	3
5	71	26	3
6	72	25	3
7	73	24	3
8	73	24	3
9	75	23	2
10	76	22	2
11	77	21	2
12	78	20	2
13	79	19	2
14	80	18	2
15	81	18	1
16	82	17	1
17	82	17	1
18	83	16	1
19	83	16	1
20	84	15	1
21	84	15	1
22	86	14	0
23	86	14	0
24	86	14	0
25	87	13	0
26	87	13	0
27	88	12	0
28	88	12	0
29	89	11	0
30	89	11	0

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

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	36	64
6	36	64
7	36	64
8	35	65
9	34	66
10	34	66
11	34	66
12	33	67
13	33	67
14	33	67
15	32	68
16	32	68
17	30	70
18	31	69
19	30	70
20	30	70
21	28	72
22	28	72
23	28	72
24	28	72
25	28	72
26	28	72
27	29	71
28	29	71
29	29	71
30	29	71

	Rain chance (%)
1	50
2	50
3	50
4	50
5	50
6	50
7	50
8	50
9	50
10	49
11	49
12	49
13	49
14	48
15	48
16	48
17	48
18	47
19	47
20	47
21	48
22	48
23	49
24	50
25	50
26	51
27	52
28	53
29	53
30	54

	Dry (%)	Comfortable (%)	Humid (%)
1	69	28	3
2	70	27	3
3	70	27	3
4	71	26	3
5	71	26	3
6	72	25	3
7	73	24	3
8	73	24	3
9	75	23	2
10	76	22	2
11	77	21	2
12	78	20	2
13	79	19	2
14	80	18	2
15	81	18	1
16	82	17	1
17	82	17	1
18	83	16	1
19	83	16	1
20	84	15	1
21	84	15	1
22	86	14	0
23	86	14	0
24	86	14	0
25	87	13	0
26	87	13	0
27	88	12	0
28	88	12	0
29	89	11	0
30	89	11	0