Portimão weather in May
May in Portimão: warm, dry, with clean air — an excellent time to visit.
#5 of 12 months in Portimão · #214 of 897 destinations to visit in May · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Portimão in May
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Portimão climate normals — May
| Daytime high | 26°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 60°F | |
| Rainfall | 21 mm / 0.8 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 62% | 💧 humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 12.7 h/day | |
| Daylight | 14.2 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Portimão in May — FAQ
- Is May a good time to visit Portimão?
- May in Portimão: warm, dry, with clean air — an excellent time to visit. It ranks #5 of 12 months for Portimão on SeasonMap's comfort score (89/100).
- What is the weather like in Portimão in May?
- In May, Portimão averages a daily high of 25.5°C and a low of 15.4°C, with about 21.1 mm of rain over roughly 3.8 rainy days.
- What is the air quality in Portimão in May?
- Portimão has a mean US Air Quality Index of about 42 in May.