Świnoujście weather in September

In September, Świnoujście sees average daytime highs of 17°C and overnight lows near 14°C, with 69 mm of rain across 11 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 15°C by the end. The sky is clear or mostly clear about 22% 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 Świnoujście's 6th-clearest and 7th-windiest month. For the whole year in context, see Świnoujście's year-round climate.

Daytime high
17°
4th warmest
Overnight low
14°
9th coldest
Rainfall
69 mm
11 wet days
Daylight
12 h 24 min
5:45 AM – 6:10 PM
Cloud cover
63%
6th clearest
Wind
22 km/h
7th windiest
Solar energy
3.01 kWh/m²
Travel score
5.2
out of 10

Świnoujście is city with powiat rights in West Pomeranian Voivodeship, Poland.

Density
207/km²
people per km²
Founded
1765

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 15°C by the end.

A typical September day in Świnoujście reaches about 17°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 14°C and 20°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11915
21915
31915
41815
51815
61815
71815
81814
91814
101814
111814
121714
131714
141714
151714
161713
171713
181713
191713
201613
211613
221613
231613
241612
251612
261612
271512
281512
291512
301512

How September really feels in Świnoujście

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.

Świnoujście weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 4911.33.77.70.0
Feb / 389.949.40.0
Mar / 429.62.211.50.2
Apr / 3380.213.72.0
May14° / 10°469.9015.74.0
Jun17° / 14°5710.4016.85.5
Jul20° / 16°6811.7016.36.1
Aug20° / 17°7011.9014.66.1
Sep17° / 14°6911012.55.2
Oct12° / 6212.2010.23.1
Nov / 5312.218.31.0
Dec / 52123.27.20.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34654
44753
54753
64654
74654
84654
94654
104555
114555
124456
134456
144456
154456
164357
174357
184258
194258
204258
214258
224159
234060
244060
254060
264060
274060
283961
293961
303961

Chance of precipitation in September

Any precipitation

Świnoujście gets around 69 mm of rain over 11 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 37% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
242
342
442
541
641
740
840
939
1039
1138
1237
1337
1436
1536
1635
1735
1835
1934
2034
2134
2234
2334
2435
2535
2635
2736
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 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15038111
25138101
35237101
4553690
5563590
6583480
7593380
8613270
9623170
10643060
11652960
12682750
13692650
14712540
15722440
16742330
17752230
18772120
19782020
20801910
21801910
22811810
23811810
24831700
25831700
26841600
27841600
28851500
29851500
30861400

Wind in September

Winds average 22 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.

0510152025151015202530
Wind speed (km/h)Feels
121breezy
221breezy
322breezy
422breezy
522breezy
622breezy
722breezy
822breezy
922breezy
1022breezy
1122breezy
1222breezy
1322breezy
1422breezy
1522breezy
1622breezy
1722breezy
1822breezy
1922breezy
2022breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2623breezy
2723breezy
2823breezy
2923breezy
3023breezy

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 5:17 AM to 6:11 AM, and sunset from 6:48 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:176:48
213.45:196:46
313.45:216:43
413.35:236:41
513.25:246:38
613.25:266:36
713.15:286:33
813.05:306:31
912.95:326:28
1012.95:346:26
1112.85:356:23
1212.75:376:20
1312.65:396:18
1412.65:416:15
1512.55:436:13
1612.45:456:10
1712.45:466:07
1812.35:486:05
1912.25:506:02
2012.15:526:00
2112.15:545:57
2212.05:565:55
2311.95:585:52
2411.85:595:49
2511.86:015:47
2611.76:035:44
2711.66:055:42
2811.56:075:39
2911.56:095:37
3011.46:115:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.01 kWh/m².

For context, solar energy here swings from a low near 0.45 kWh/m² to a high of 5.71 kWh/m² in June across the year — September's 3.01 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.6Moderate
43.6Moderate
53.5Moderate
63.5Moderate
73.4Moderate
83.4Moderate
93.3Moderate
103.3Moderate
113.2Moderate
123.2Moderate
133.1Moderate
143.1Moderate
153.0Moderate
163.0Moderate
172.9Moderate
182.9Moderate
192.9Moderate
202.8Moderate
212.8Moderate
222.7Moderate
232.6Moderate
242.6Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.4Moderate
292.4Moderate
302.3Moderate
Planning a trip in September

Is September a good time to visit Świnoujście?

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

5.2
Sightseeing
4th-best month of the year
1.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Świnoujście for sightseeing.

What to pack for Świnoujście in September

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

In September, Świnoujście sees daytime highs around 17°C and nights near 14°C. Worth packing: a warm layer, rain gear and a windbreaker. About 11 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Świnoujście 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 19°C and coldest in February near 2°C.

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

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan2Bracing
Feb2Bracing
Mar3Bracing
Apr7Bracing
May12Bracing
Jun16Cool
Jul19Cool
Aug19Cool
Sep17Cool
Oct12Bracing
Nov8Bracing
Dec4Bracing

UV index in Świnoujście 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 Świnoujście peaks around June 16 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 16UV 6Dec 21UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5High
Jun6High
Jul5High
Aug5Moderate
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Świnoujście?

Świnoujście sits at 53.9°N, 14.2°E, 4 m above sea level, in Poland. The nearest listed city is Police, 45 km away.

PoliceGoleniówDrzetowo-GrabowoŚwierczewoSzczecinGryficeNowogard

Topography around Świnoujście

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

Within 3 km, the terrain around Świnoujście has only modest variations in elevation — a maximum elevation change of 63 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 122 m; within 80 km, only modest variations in elevation — a maximum elevation change of 192 m.

The land around Świnoujście is covered by trees (44%), water (28%) and artificial surfaces (20%) within 3 km, water (65%) within 16 km, and water (32%), cropland (29%) and trees (22%) within 80 km.

3 km
63 m
16 km
122 m
80 km
192 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Police 45 km · Goleniów 54 km · Drzetowo-Grabowo 56 km · Świerczewo 57 km · Szczecin 57 km · Universitäts- und Hansestadt Greifswald 59 km · Gryfice 62 km · Nowogard 63 km

Poland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 52% of US
price level, 2025
GDP per capita
$28,420
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
9.4
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 600
Religion
Roman Catholic 71%refused to answer 21%no religion 7%

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 Świnoujście (53.9105°, 14.2471°, elevation 4 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).