Cartagena weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: March – November
What is the weather like in Cartagena in September?
In September, Cartagena is warm: daytime highs average 27 °C, and even at night it stays warm at around 22 °C. The sea averages 24.6 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is rare: about 4 days bring 38 mm in total. The air is often humid and muggy. All in all, September is an excellent month for a holiday in Cartagena.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 88 | 97 | 93 |
| Day | 29° | 27° | 23° |
| Night | 24° | 22° | 18° |
| Sea | 26° | 25° | 22° |
| Sun | 10 h | 8 h | 7 h |
| Rain days | 1 | 4 | 5 |
More details for September
- Daylight
- 12 h 29 min07:45 – 20:14
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 18 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 40 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Time zone
- UTC+2Europe/Madrid
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %87 %
- Few rainy daysweight 30 %99 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
Cartagena in September: quick answers
Is Cartagena hot in September?
Warm rather than hot: in September, daytime highs in Cartagena average 27 °C and nights cool to about 22 °C.
Can you swim in Cartagena in September?
Yes. In September the sea averages 24.6 °C – pleasant for swimming.
Does it rain much in Cartagena in September?
Rain is rare: about 4 days bring 38 mm in total.
Cartagena month by month
The whole year in CartagenaAll destinations: SpainWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences