Weather in Cascais for September 2027
In general, the average temperature in Cascais at the beginning of September is 20.8 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 21.5 °C by the end of September.
With an average of 3 rainy days, Cascais experiences minimal rainfall in September.
Is September a good time to visit Cascais? check out the best time to travel to Cascais page.
✨ Is September a good time to visit Cascais? – Ask the AI Weatherman
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Cascais Weather September
Temperatures trend during September in Cascais
September weather in Cascais day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 20° /18° | 0.1 mm | 6 | |
| 2 Sept. |  Sunny | 20° /18° | 0.1 mm | 6 | |
| 3 Sept. |  Patchy rain possible | 22° /17° | 1 mm | 6 | |
| 4 Sept. |  Light rain | 22° /18° | 2.8 mm | 5 | |
| 5 Sept. | Patchy rain possible | 21° /18° | 1.1 mm | 6 | |
| 6 Sept. | Sunny | 20° /18° | 0 mm | 6 | |
| 7 Sept. | Patchy rain possible | 21° /18° | 1.4 mm | 6 | |
| 8 Sept. | Sunny | 20° /18° | 0 mm | 5 | |
| 9 Sept. | Patchy rain possible | 20° /18° | 0.8 mm | 6 | |
| 10 Sept. | Patchy rain possible | 21° /18° | 0.1 mm | 6 | |
| 11 Sept. | Sunny | 22° /18° | 0 mm | 6 | |
| 12 Sept. | Sunny | 23° /18° | 0 mm | 6 | |
| 13 Sept. | Sunny | 22° /18° | 0 mm | 6 | |
| 14 Sept. | Sunny | 23° /19° | 0 mm | 6 | |
| 15 Sept. |  Partly cloudy | 22° /18° | 0 mm | 6 | |
| 16 Sept. | Patchy rain possible | 22° /18° | 2.3 mm | 6 | |
| 17 Sept. | Light rain | 22° /18° | 4 mm | 6 | |
| 18 Sept. | Partly cloudy | 21° /18° | 0.1 mm | 6 | |
| 19 Sept. | Partly cloudy | 22° /18° | 0 mm | 6 | |
| 20 Sept. | Patchy rain possible | 22° /18° | 0.2 mm | 6 | |
| 21 Sept. | Sunny | 22° /18° | 0.7 mm | 5 | |
| 22 Sept. | Sunny | 21° /17° | 0.1 mm | 5 | |
| 23 Sept. | Sunny | 21° /16° | 0 mm | 5 | |
| 24 Sept. | Sunny | 22° /17° | 0 mm | 6 | |
| 25 Sept. | Sunny | 22° /18° | 0.2 mm | 5 | |
| 26 Sept. | Partly cloudy | 22° /18° | 0.8 mm | 5 | |
| 27 Sept. | Sunny | 21° /17° | 0.5 mm | 4 | |
| 28 Sept. | Sunny | 21° /17° | 0.5 mm | 5 | |
| 29 Sept. | Sunny | 22° /18° | 0.2 mm | 5 | |
| 30 Sept. | Sunny | 22° /18° | 0.9 mm | 5 | |
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Cascais weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Sunny | Sunny | Patchy rain possible |
| Temperatures | 23°/18° | 21°/18° | 20°/17° |
| Rainfall | 10 mm | 18 mm | 73 mm |
| Wind | 29.2 km/h | 27.4 km/h | 25.4 km/h |
| Humidity | 80% | 77% | 77% |
| Rainy days | 2 days | 3 days | 10 days |
| Dry days | 29 days | 27 days | 21 days |
Planning a trip to Cascais? Discover the best time to visit
Cascais in September - FAQ
What are the expected maximum and minimum temperatures in Cascais during September?
How much rainfall should be expected in Cascais during September?
What are the typical wind conditions in Cascais during September?
Cascais water temperatures in September
The average water temperature of the Atlantic Ocean near Cascais in September is 16.9 °C. At the beginning of September temperatures are around 17.4 °C; by the end of the month they get cooler and reach 16.4 °C.
- What is the water temperature in Cascais in September?
- The average water temperature in Cascais in September is 16.9 °C.
- Can you swim in Cascais in September?
- Brisk: quick dips and active swimming are fine, but pack a 2–3 mm spring suit if you plan longer sessions or early-morning outings.
September rainfall patterns in Cascais
UV exposure in Cascais during September
What to pack to Cascais in September?
Mild · highs around 21 °C, mostly dry
As you prepare for your trip to Cascais in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Cascais, during September, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
🎒 Accessories
Where is Cascais?Get accurate weather forecasts for Cascais, located at latitude 38.697 and longitude -9.421. Stay updated with localized weather information tailored for Cascais.