Weather in Cacém, Portugal 🇵🇹
Live weather in Cacém, currently 30°C with sunny. View the 7-day forecast, hourly conditions, and air quality index. Cacém is in Portugal — see weather across all major cities in Portugal, or browse the hottest cities right now worldwide.
30.3°C
feels like 27.6°C
Sunny
Current Weather in Cacém, Portugal Updated at 4:45 PM today
| 💧 Humidity: | 35% |
| 🌬️ Wind: | 19.1 kph (333°) |
| 🌡️ Pressure: | 1020.0 mb |
| 👁️ Visibility: | 10.0 km |
| 🌧️ Precipitation: | 0.0 mm |
| ☁️ Cloud Cover: | 5% |
| ☀️ UV Index: | 4.0 |
| 🌅 Sunrise: | 07:10 AM |
| 🌇 Sunset: | 08:00 PM |
What is the weather like in Cacém right now?
It's hot in Cacém right now — 30°C, with clear skies. Bright sunshine dominates the sky just now. It feels slightly cooler than it reads, nearer 28°C. There's a noticeable 19 kph wind out of the west.
The air is clean today — EPA index 1, with low PM2.5 of 14. A moderate UV of 4 — take some care in the midday sun. Daylight runs from 07:10 AM to 08:00 PM today — about 12h 50m.
Rain is unlikely — about a 1% chance, 0 mm at most. It should stay dry through the next 24 hours. Today is warmer than normal — roughly 6°C above the typical September high of 25°C.
The week ahead looks settled, with highs holding around 29°C and lows near 17°C. For context, the record high for this date in Cacém is 34°C.
Bottom line: stay hydrated, seek shade, and avoid the midday sun in Cacém today.
7-Day Weather Forecast for Cacém, Portugal 🇵🇹
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Hourly Weather Forecast for Cacém, Portugal 🇵🇹 Today
Air Quality Index in Cacém, Portugal 🇵🇹 (AQI)
US EPA Index
Environmental Protection Agency
UK DEFRA Index
Department for Environment, Food & Rural Affairs
| Parameter | Value |
|---|---|
| US EPA Index: | 1 (Good) |
| UK DEFRA Index: | 2 (Low) |
| CO: | 121.0 µg/m³ |
| O3: | 87.0 µg/m³ |
| NO2: | 2.8 µg/m³ |
| SO2: | 1.2 µg/m³ |
| PM2.5: | 14.1 µg/m³ |
| PM10: | 29.0 µg/m³ |
About Cacém
Cacém, a suburb of Lisbon nestled in the municipality of Sintra, offers a quieter, residential counterpoint to the Portuguese capital’s bustle. The vibe is unhurried, with tree-lined streets, local cafés, and small parks filling daily life. Geographically, it sits on the western edge of the Iberian Peninsula, cradled between the rolling Sintra Mountains and the Atlantic coast. While Cacém itself lacks major tourist landmarks, its proximity to Sintra’s fairy-tale palaces and the rugged cliffs of Cabo da Roca makes it a practical base. The Tagus River estuary lies to the south, and the entire region is marked by gentle hills and a pervasive greenness, thanks to the mild, moist Atlantic influence.
Under the Köppen Csb classification, Cacém experiences a warm-summer Mediterranean climate. Summers are comfortably warm, with July and August averaging highs around 27°C, tempered by cool Atlantic breezes; lows hover near 16°C, so evenings stay pleasant. Winters are mild and wet, with daytime temperatures between 12°C and 15°C and nights rarely dipping below 8°C. Rainfall concentrates from October to February, with frequent but light showers, while humidity remains moderate year-round. Packing for a visit means layering: light cotton for summer, a sweater for coastal evenings, and a waterproof jacket for the damp winter months. The shoulder seasons—spring and autumn—bring changeable conditions, so a mix of clothing covers the bases.
The best weather window spans late spring (May through June) and early autumn (September to October), when skies are clear, temperatures hover in the low 20s, and the tourist crowds thin. Notable phenomena include the occasional Atlantic storm battering the coast in winter, bringing gusty winds and heavy rain, but nothing severe. A persistent fog—the “Sintra fog”—can roll in from the mountains and shroud Cacém in a moody mist, especially in late autumn and early spring, adding a touch of local drama. Snow is unheard of, and the region avoids extremes of heat or cold, making it a reliably temperate destination year-round.
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