Porto Weather in September

In Porto, September brings high daytime temperatures around 24°C (75°F), with nights cooling to 17°C (63°F). Expect quite a bit of rainfall this month.

Rainfall in Porto in September

Looking at the last 30 years, the data shows about 9 days with rain, averaging 62 mm (2.4 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Porto in September

September is a excellent month in Porto, with 24°C (75°F) during the day and 17°C (63°F) at night. September is typically considered a summer month. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 17°C (63°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Porto in September

The city usually sees around 224 hours of sunlight, indicating many sunny days , a great month for sightseeing.

Wind Speed in Porto in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Average water temperature in September

At 18°C (64°F), the water is getting there, comfortable enough for most swimmers, though those used to warmer seas may still find it a touch cool.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.