Słupsk weather in August

In August, Słupsk sees average daytime highs of 21°C and overnight lows near 15°C, with 85 mm of rain across 13.7 wet days and about 14.7 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 19°C by the end. The sky is clear or mostly clear about 28% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 15 h 42 min at the start of August to 13 h 36 min by month's end. Set against the rest of the year, August is Słupsk's 4th-clearest and 11th-windiest month. For the whole year in context, see Słupsk's year-round climate.

Daytime high
21°
1st warmest
Overnight low
15°
12th coldest
Rainfall
85 mm
13.7 wet days
Daylight
14 h 42 min
4:35 AM – 7:17 PM
Cloud cover
58%
4th clearest
Wind
16 km/h
11th windiest
Solar energy
4.37 kWh/m²
Travel score
5.9
out of 10

Słupsk is city in the Pomeranian Voivodeship, in the northern part of Poland.

Density
1,870/km²
people per km²
Founded
1000

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 19°C by the end.

A typical August day in Słupsk reaches about 21°C in the afternoon and slips back to 15°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 25°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12115
22115
32115
42115
52115
62115
72115
82115
92115
102115
112115
122115
132115
142115
152115
162115
172115
182115
192115
202015
212015
222014
232014
242014
252014
262014
272014
281914
291914
301914
311914

How August really feels in Słupsk

Once humidity and wind are folded in, August 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

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

Słupsk weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°5912.24.77.60.0
Feb / -1°4710.95.19.30.0
Mar / 5110.53.611.50.3
Apr10° / 368.80.813.72.3
May14° / 5610.5015.74.3
Jun18° / 12°6811.5016.95.6
Jul20° / 15°9113.4016.46.0
Aug21° / 15°8513.7014.75.9
Sep17° / 12°7812.3012.55.0
Oct12° / 8013.60.110.22.8
Nov / 6513.21.48.20.7
Dec / 6613.54.57.10.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25149
35149
45149
55149
65149
75050
85050
95050
105050
115050
124951
134852
144951
154951
164852
174852
184951
194852
204951
214951
225050
235050
244951
254951
264951
274951
284951
294951
304852
314753

Chance of precipitation in August

Any precipitation

Słupsk gets around 85 mm of rain over 13.7 wet days in August. 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 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
138
239
339
439
539
640
740
841
941
1042
1142
1243
1343
1444
1545
1645
1746
1846
1946
2047
2147
2247
2347
2448
2548
2648
2749
2849
2949
3049
3150

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12046286
22046286
32146286
42145286
52245286
62245275
72345275
82445265
92545254
102645254
112745244
122845234
132945223
143045213
153146203
163246193
173246193
183347183
193447172
203547162
213647162
223747152
233846141
243945141
254145131
264344131
274443121
284642120
294841110
305139100
315238100

Wind in August

Winds average 16 km/h in August.

Across August, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 42 min at the start of August to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 126 minutes over August. Sunrise moves from 4:08 AM to 5:03 AM, and sunset from 7:48 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.74:087:48
215.64:107:46
315.54:127:44
415.54:137:42
515.44:157:40
615.44:177:38
715.34:197:36
815.24:207:34
915.24:227:32
1015.14:247:30
1115.04:267:28
1215.04:287:26
1314.94:307:24
1414.84:317:21
1514.84:337:19
1614.74:357:17
1714.64:377:15
1814.64:397:12
1914.54:417:10
2014.44:437:08
2114.34:447:05
2214.34:467:03
2314.24:487:00
2414.14:506:58
2514.14:526:56
2614.04:546:53
2713.94:566:51
2813.84:586:48
2913.84:596:46
3013.75:016:43
3113.65:036:41

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.37 kWh/m².

For context, solar energy here swings from a low near 0.41 kWh/m² to a high of 5.63 kWh/m² in June across the year — August's 4.37 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.8Bright
74.7Bright
84.7Bright
94.7Bright
104.6Bright
114.6Bright
124.5Bright
134.5Bright
144.5Bright
154.4Bright
164.4Bright
174.3Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.1Bright
234.1Bright
244.0Bright
254.0Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.7Moderate
303.7Moderate
313.6Moderate
Planning a trip in August

Is August a good time to visit Słupsk?

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

5.9
Sightseeing
2nd-best month of the year
3.4
Beach & pool
1st-best month of the year

August is a reasonable time to visit Słupsk for sightseeing.

What to pack for Słupsk in August

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

In August, Słupsk sees daytime highs around 21°C and nights near 15°C. Worth packing: rain gear. About 14 days see rain.

rain gear

Sea temperature near Słupsk in August

The nearest coast averages about 19°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 20 km away) is warmest in August at about 19°C and coldest in February near 3°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
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr5Bracing
May9Bracing
Jun14Bracing
Jul17Cool
Aug19Cool
Sep16Cool
Oct13Bracing
Nov9Bracing
Dec6Bracing

UV index in Słupsk in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Słupsk peaks around June 18 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 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 18UV 6Dec 20UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5Moderate
Jun6High
Jul6High
Aug5Moderate
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Słupsk?

Słupsk sits at 54.5°N, 17.0°E, 18 m above sea level, in Poland. The nearest listed city is Ustka, 17 km away.

BytówLęborkKoszalinKościerzynaKartuzyWejherowoBiałogard

Topography around Słupsk

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

Within 3 km, the terrain around Słupsk has only modest variations in elevation — a maximum elevation change of 78 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 162 m; within 80 km, significant variations in elevation — a maximum elevation change of 339 m.

The land around Słupsk is covered by trees (45%) and artificial surfaces (33%) within 3 km, trees (40%) and cropland (39%) within 16 km, and trees (39%) and water (30%) within 80 km.

3 km
78 m
16 km
162 m
80 km
339 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Ustka 17 km · Bytów 44 km · Lębork 47 km · Koszalin 63 km · Kościerzyna 73 km · Kartuzy 77 km · Wejherowo 79 km · Białogard 85 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 Słupsk (54.4641°, 17.0287°, 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).