Mers el Kebir weather in September

In September, Mers el Kebir sees average daytime highs of 25°C and overnight lows near 22°C, with 14 mm of rain across 2.8 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 64% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Mers el Kebir's 4th-clearest and 9th-windiest month. For the whole year in context, see Mers el Kebir's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
14 mm
2.8 wet days
Daylight
12 h 12 min
6:50 AM – 7:04 PM
Cloud cover
35%
4th clearest
Wind
14 km/h
9th windiest
Solar energy
5.47 kWh/m²
Travel score
8.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 24°C by the end.

A typical September day in Mers el Kebir reaches about 25°C in the afternoon and slips back to 22°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12723
22723
32723
42723
52623
62623
72623
82623
92622
102622
112622
122622
132622
142622
152522
162522
172522
182522
192521
202521
212521
222521
232521
242521
252421
262421
272421
282421
292421
302420

Mers el Kebir weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan15° / 12°5189.95.1
Feb15° / 12°38710.65.3
Mar17° / 13°436.411.76.1
Apr18° / 15°355.512.96.9
May21° / 17°193.213.97.9
Jun24° / 20°40.814.49.1
Jul27° / 23°10.114.29.0
Aug27° / 24°30.613.48.6
Sep25° / 22°142.812.28.4
Oct22° / 19°315.111.17.8
Nov19° / 15°63810.16.5
Dec16° / 13°4779.65.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 64% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 23%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28515
38416
48317
58218
68119
78119
87921
97921
107822
117822
127723
137723
147624
157624
167525
177525
187525
197525
207525
217525
227426
237426
247426
257426
267426
277525
287525
297525
307525

Chance of precipitation in September

Any precipitation

Mers el Kebir gets around 14 mm of rain over 2.8 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 8% and peaks near 13% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
13
24
34
44
55
65
76
86
96
107
117
127
137
148
158
168
179
189
199
2010
2110
2211
2311
2412
2512
2612
2712
2812
2913
3013

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
102164636
202164734
302164833
403174931
503185029
604185127
704195225
805205124
906215023
1007225021
1107235020
1208244919
1309254818
14110254717
15110274716
16111284615
17111294614
18111304513
19112314512
20112334411
21112344410
2211235439
2311237438
2411238437
2511239426
2611340425
2711341424
2811341413
2911342413
3021442402

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 6:39 AM to 7:02 AM, and sunset from 7:26 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:397:26
212.86:407:25
312.76:407:23
412.76:417:22
512.66:427:20
612.66:437:19
712.66:437:17
812.56:447:16
912.56:457:14
1012.56:467:13
1112.46:477:11
1212.46:477:10
1312.36:487:08
1412.36:497:07
1512.36:507:05
1612.26:507:04
1712.26:517:02
1812.16:527:01
1912.16:536:59
2012.16:546:58
2112.06:546:56
2212.06:556:55
2312.06:566:53
2411.96:576:52
2511.96:586:50
2611.86:586:49
2711.86:596:47
2811.87:006:46
2911.77:016:44
3011.77:026:43

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.47 kWh/m².

For context, solar energy here swings from a low near 2.5 kWh/m² to a high of 7.6 kWh/m² in June across the year — September's 5.47 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.0Intense
66.0Bright
75.9Bright
85.9Bright
95.8Bright
105.8Bright
115.7Bright
125.7Bright
135.6Bright
145.5Bright
155.5Bright
165.5Bright
175.4Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.8Bright
Planning a trip in September

Hazard calendar for Mers el Kebir

In seasonPeak

None of Mers el Kebir's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Mers el Kebir sees seasonal dust haze (July–August), heaviest in July.

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

Is September a good time to visit Mers el Kebir?

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

8.4
Sightseeing
4th-best month of the year
7.7
Beach & pool
3rd-best month of the year

September is one of the better times to visit Mers el Kebir for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mers el Kebir in September

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

In September, Mers el Kebir sees daytime highs around 25°C and nights near 22°C. Worth packing: light clothes and sun protection.

light clothessun protection

Sea temperature near Mers el Kebir in September

The nearest coast averages about 24°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 18 km away) is warmest in August at about 25°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 7 to Oct 30 — about 4.8 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug25Warm
Sep24Refreshing
Oct21Refreshing
Nov19Cool
Dec17Cool

UV index in Mers el Kebir in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mers el Kebir peaks around July 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 20UV 9Dec 19UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar7High
Apr7High
May8Very high
Jun8Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Mers el Kebir 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 Mers el Kebir is worst in March — around 23 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (June, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1622 µg/m³Jun 1013 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb19Moderate
Mar23Moderate
Apr17Moderate
May14Moderate
Jun13Moderate
Jul16Moderate
Aug16Moderate
Sep19Moderate
Oct17Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Mers el Kebir?

Mers el Kebir sits at 35.7°N, 0.7°W, 22 m above sea level, in Algeria. The nearest listed city is ’Aïn el Turk, 6.0 km away.

Topography around Mers el Kebir

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

Within 3 km, the terrain around Mers el Kebir has significant variations in elevation — a maximum elevation change of 509 m around an average of 112 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 581 m; within 80 km, large variations in elevation — a maximum elevation change of 1,033 m.

The land around Mers el Kebir is covered by water (46%) and grassland (23%) within 3 km, water (46%) within 16 km, and water (39%) and cropland (34%) within 80 km.

3 km
509 m
16 km
581 m
80 km
1,033 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: ’Aïn el Turk 6.0 km · Oran 7.0 km · Es Senia 12 km · Bir el Djir 15 km · En Nedjma 15 km · Sidi ech Chahmi 18 km · Assi Bou Nif 19 km · Bou Tlelis 24 km

Algeria travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$6,051
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
69%
of population, 2024
Homicide rate
1.2
per 100k, 2023
Road deaths
20.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 468
Religion
Muslim 99%

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 Mers el Kebir (35.7279°, -0.7081°, elevation 22 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).