Nessebar weather in September

In September, Nessebar sees average daytime highs of 23°C and overnight lows near 17°C, with 62 mm of rain across 6.7 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 21°C by the end. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels humid.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Nessebar's 4th-clearest and 7th-windiest month. For the whole year in context, see Nessebar's year-round climate.

Daytime high
23°
4th warmest
Overnight low
17°
9th coldest
Rainfall
62 mm
6.7 wet days
Daylight
12 h 18 min
5:55 AM – 6:12 PM
Cloud cover
44%
4th clearest
Wind
13 km/h
7th windiest
Solar energy
4.35 kWh/m²
Travel score
7.6
out of 10

Nessebar is city in Nesebar municipality, Burgas oblast, Bulgaria.

Density
419/km²
people per km²

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 25°C in the first days to 21°C by the end.

A typical September day in Nessebar reaches about 23°C in the afternoon and slips back to 17°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 26°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12519
22519
32518
42518
52418
62418
72418
82418
92418
102417
112417
122317
132317
142317
152317
162317
172317
182216
192216
202216
212216
222216
232216
242116
252115
262115
272115
282115
292115
302015

How September really feels in Nessebar

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.

Nessebar 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 / 557.82.79.20.5
Feb / 477.52.610.31.0
Mar10° / 5391.111.62.4
Apr14° / 438.10.113.14.3
May19° / 13°448.4014.46.6
Jun24° / 18°467.4015.17.6
Jul27° / 20°396.5014.87.6
Aug27° / 20°314.6013.77.9
Sep23° / 17°626.7012.37.6
Oct18° / 12°627.5010.85.9
Nov12° / 496.90.49.63.6
Dec / 619.32.48.91.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28119
38020
47921
57921
67822
77723
87723
97624
107624
117525
127426
137327
147327
157228
167129
176931
186931
196832
206733
216535
226436
236436
246337
256337
266139
276139
286040
295941
305941

Chance of precipitation in September

Any precipitation

Nessebar gets around 62 mm of rain over 6.7 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 21% and peaks near 25% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
117
217
318
418
518
618
718
818
918
1018
1118
1218
1318
1419
1519
1620
1721
1821
1922
2023
2124
2224
2325
2425
2525
2625
2725
2825
2925
3025

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1142535251
2152635231
3162735221
4172835201
5182834191
6182935171
7193035160
8193135150
9203135140
10203235130
11213235120
12213334120
13223334110
14233333110
15243233100
16253232100
17273232100
1828313190
1930313190
2031303090
2133292980
2235292980
2336282880
2438282770
2539272770
2641272660
2742272560
2843272450
2944282450
3045282340

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 5:38 AM to 6:11 AM, and sunset from 6:39 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:386:39
213.05:396:37
312.95:406:36
412.95:426:34
512.85:436:32
612.85:446:30
712.75:456:29
812.75:466:27
912.65:476:25
1012.65:486:23
1112.55:496:21
1212.55:506:19
1312.45:526:17
1412.45:536:16
1512.35:546:14
1612.35:556:12
1712.25:566:10
1812.25:576:08
1912.15:586:06
2012.15:596:04
2112.06:006:03
2212.06:026:01
2311.96:035:59
2411.96:045:57
2511.86:055:55
2611.86:065:53
2711.76:075:52
2811.76:085:50
2911.66:095:48
3011.66:115:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.35 kWh/m².

For context, solar energy here swings from a low near 1.39 kWh/m² to a high of 6.8 kWh/m² in June across the year — September's 4.35 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.6Bright
134.5Bright
144.5Bright
154.4Bright
164.4Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.0Bright
224.0Moderate
233.9Moderate
243.9Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Nessebar?

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

7.6
Sightseeing
2nd-best month of the year
5.8
Beach & pool
4th-best month of the year

September is one of the better times to visit Nessebar for general sightseeing.

What to pack for Nessebar in September

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

In September, Nessebar sees daytime highs around 23°C and nights near 17°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near Nessebar in September

The nearest coast averages about 23°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 25°C and coldest in February near 7°C.

It's comfortable for a long swim from Jun 10 to Oct 5 — about 3.9 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan8Bracing
Feb7Bracing
Mar7Bracing
Apr10Bracing
May16Cool
Jun21Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov14Bracing
Dec10Bracing

UV index in Nessebar in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Nessebar peaks around July 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowJul 17UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr7Very high
May6High
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Nessebar in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Nessebar is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1915 µg/m³Dec 148 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar15Moderate
Apr13Moderate
May12Good
Jun11Good
Jul10Good
Aug10Good
Sep9Good
Oct9Good
Nov9Good
Dec8Good
Location & terrain

Where is Nessebar?

Nessebar sits at 42.7°N, 27.7°E, 0 m above sea level, in Bulgaria. The nearest listed city is Burgas, 28 km away.

AytosAsparuhovoKarnobatVarnaShumenDobrichYambol

Topography around Nessebar

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

Within 3 km, the terrain around Nessebar has only modest variations in elevation — a maximum elevation change of 30 m around an average of 2 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 474 m; within 80 km, large variations in elevation — a maximum elevation change of 809 m.

The land around Nessebar is covered by water (84%) within 3 km, water (52%) and trees (20%) within 16 km, and trees (36%), water (30%) and cropland (23%) within 80 km.

3 km
30 m
16 km
474 m
80 km
809 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Burgas 28 km · Aytos 40 km · Asparuhovo 59 km · Karnobat 62 km · Varna 64 km · Shumen 95 km · Dobrich 101 km · Yambol 103 km

Bulgaria travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 23% of US
price level, 2025
GDP per capita
$20,328
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
96%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
9.2
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 594
Religion
Christian 65%Muslim 10%none 5%other 0%

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 Nessebar (42.6592°, 27.736°, elevation 0 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).