Bournemouth weather in September

In September, Bournemouth sees average daytime highs of 18°C and overnight lows near 12°C, with 54 mm of rain across 9 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 17°C by the end. The sky is clear or mostly clear about 18% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Bournemouth's 4th-clearest and 8th-windiest month. For the whole year in context, see Bournemouth's year-round climate.

Daytime high
18°
4th warmest
Overnight low
12°
10th coldest
Rainfall
54 mm
9 wet days
Daylight
12 h 24 min
5:51 AM – 6:13 PM
Cloud cover
67%
4th clearest
Wind
16 km/h
8th windiest
Solar energy
3.25 kWh/m²
Travel score
5.8
out of 10

Bournemouth is town and civil parish in Bournemouth, Christchurch and Poole, Dorset, England.

Air quality
Moderate
PM2.5 10.8 µg/m³ · 2019
Density
3,543/km²
people per km²
Founded
1810

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 19°C in the first days to 17°C by the end.

A typical September day in Bournemouth reaches about 18°C in the afternoon and slips back to 12°C overnight — a 6°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, September runs about 2°C cooler than August and about 3°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11913
21913
31913
41913
51913
61913
71913
81913
91913
101913
111813
121813
131813
141812
151812
161812
171812
181812
191812
201812
211712
221712
231712
241712
251712
261712
271712
281712
291712
301611

How September really feels in Bournemouth

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

Bournemouth weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7112.30.38.31.3
Feb / 539.80.59.71.4
Mar10° / 499.60.411.52.2
Apr12° / 5310.10.113.53.3
May15° / 519.7015.24.6
Jun18° / 12°519.7016.25.7
Jul20° / 14°479.3015.86.3
Aug20° / 14°639.4014.36.3
Sep18° / 12°549012.45.8
Oct15° / 10°8211.9010.44.1
Nov11° / 8412.208.72.6
Dec / 7811.80.27.81.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33664
43763
53664
63664
73664
83565
93565
103664
113565
123565
133565
143565
153664
163664
173664
183664
193565
203565
213565
223565
233565
243565
253565
263565
273565
283565
293466
303367

Chance of precipitation in September

Any precipitation

Bournemouth gets around 54 mm of rain over 9 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 30% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
127
226
326
426
526
627
727
827
927
1028
1128
1228
1328
1428
1529
1629
1729
1830
1930
2031
2131
2232
2333
2434
2535
2636
2737
2837
2938
3038

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 66% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
155387
256377
357367
458357
559347
660337
761327
862317
963307
1064297
1165287
1266286
1367276
1467276
1568275
1669265
1770264
1869274
1970273
2070273
2170282
2270282
2370282
2470291
2571281
2671281
2772271
2872271
2973261
3074251

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

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

Days shrink by about 114 minutes over September. Sunrise moves from 5:27 AM to 6:13 AM, and sunset from 6:48 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:276:48
213.35:286:46
313.25:306:43
413.25:316:41
513.15:336:39
613.05:356:36
713.05:366:34
812.95:386:32
912.85:396:30
1012.85:416:27
1112.75:436:25
1212.65:446:23
1312.65:466:20
1412.55:476:18
1512.45:496:16
1612.45:516:13
1712.35:526:11
1812.25:546:08
1912.25:556:06
2012.15:576:04
2112.05:596:01
2212.06:005:59
2311.96:025:57
2411.96:035:54
2511.86:055:52
2611.76:075:50
2711.76:085:47
2811.66:105:45
2911.56:115:43
3011.56:135:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.25 kWh/m².

For context, solar energy here swings from a low near 0.71 kWh/m² to a high of 5.58 kWh/m² in June across the year — September's 3.25 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.8Moderate
43.8Moderate
53.7Moderate
63.7Moderate
73.6Moderate
83.6Moderate
93.6Moderate
103.5Moderate
113.5Moderate
123.4Moderate
133.4Moderate
143.3Moderate
153.3Moderate
163.2Moderate
173.2Moderate
183.1Moderate
193.1Moderate
203.0Moderate
213.0Moderate
223.0Moderate
232.9Moderate
242.9Moderate
252.8Moderate
262.8Moderate
272.7Moderate
282.6Moderate
292.6Moderate
302.5Moderate
Planning a trip in September

Is September a good time to visit Bournemouth?

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

5.8
Sightseeing
3rd-best month of the year
1.9
Beach & pool
4th-best month of the year

September is a reasonable time to visit Bournemouth for sightseeing.

What to pack for Bournemouth in September

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

In September, Bournemouth sees daytime highs around 18°C and nights near 12°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Bournemouth in September

The nearest coast averages about 17°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 18°C and coldest in March near 8°C.

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

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun14Bracing
Jul16Cool
Aug18Cool
Sep17Cool
Oct16Cool
Nov13Bracing
Dec11Bracing

UV index in Bournemouth 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 Bournemouth 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 13UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug7High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Bournemouth?

Bournemouth sits at 50.7°N, 1.9°W, 19 m above sea level, in United Kingdom. The nearest listed city is Christchurch, 7.0 km away.

Topography around Bournemouth

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

Within 3 km, the terrain around Bournemouth has only modest variations in elevation — a maximum elevation change of 63 m around an average of 25 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 201 m; within 80 km, significant variations in elevation — a maximum elevation change of 307 m.

The land around Bournemouth is covered by water (35%), trees (32%) and artificial surfaces (27%) within 3 km, water (38%), grassland (24%) and trees (22%) within 16 km, and water (37%) and grassland (29%) within 80 km.

3 km
63 m
16 km
201 m
80 km
307 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Christchurch 7.0 km · Poole 7.0 km · Ferndown 10 km · Wimborne Minster 10 km · New Milton 16 km · Totton 35 km · Hythe 37 km · Dorchester 39 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
Christian 60%none 26%Muslim 4%other 2%

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 Bournemouth (50.7205°, -1.8795°, elevation 19 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).