15-Day Weather Forecast - Porto

15-day weather forecast for Porto: temperatures from 15°C (59°F) to 35°C (95°F). Average daily high 28°C (82°F) over the next 15 days.

Hourly Forecast by Day

Today·11 Sep
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Temperature · peaks at +26°C

15-Day Temperature Trend

26°15°TodaySep31°17°Tmrw31°18°Sun28°17°Mon21°16°Tue29°16°Wed22°17°Thu25°16°Fri23°15°Sat27°16°Sun35°22°Mon31°24°Tue31°21°Wed30°24°Thu25°16°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +26°/+15°
    feels +28°11 km/hUV 6 · Hi
    07:1019:50
  • Sat, Sep 12Tomorrow
    +31°/+17°
    feels +34°10 km/hUV 6 · Hi
    07:1119:48
  • Sun, Sep 13Sun
    +31°/+18°
    feels +34°7 km/hUV 6 · Hi
    07:1219:47
  • Mon, Sep 14Mon
    +28°/+17°
    feels +31°8 km/hUV 6 · Hi
    07:1319:45
  • Tue, Sep 15Tue
    +21°/+16°
    feels +23°8 km/hUV 6 · Hi
    07:1419:43
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  • Wed, Sep 16Wed
    +29°/+16°
    feels +31°16 km/hUV 6 · Hi
    07:1519:42
  • Thu, Sep 17Thu
    +22°/+17°
    feels +25°9 km/hUV 6 · Mod
    07:1619:40
  • Fri, Sep 18Fri
    +25°/+16°
    feels +27°8 km/hUV 6 · Hi
    07:1719:38
  • Sat, Sep 19Sat
    +23°/+15°
    feels +25°0 mm · 2%9 km/hUV 6 · Hi
    07:1819:37
  • Sun, Sep 20Sun
    +27°/+16°
    feels +28°0 mm · 1%9 km/hUV 2 · Low
    07:1919:35
  • Mon, Sep 21Mon
    +35°/+22°
    feels +35°0 mm · 2%18 km/hUV 5 · Mod
    07:2019:33
  • Tue, Sep 22Tue
    +31°/+24°
    feels +30°0 mm · 2%14 km/hUV 6 · Mod
    07:2119:31
  • Wed, Sep 23Wed
    +31°/+21°
    feels +31°0 mm · 7%12 km/hUV 5 · Mod
    07:2219:30
  • Thu, Sep 24Thu
    +30°/+24°
    feels +28°0 mm · 8%26 km/hUV 5 · Mod
    07:2319:28
  • Fri, Sep 25Fri
    +25°/+16°
    feels +21°0 mm · 8%31 km/hUV 4 · Mod
    07:2419:26

Weather Insight

Porto's 15-day outlook ranges from a low of 15°C to a high of 35°C, with an average daytime high near 28°C. That's 4° above the long-term average high of 24°C for this time of year. Air quality is currently good (AQI 44), with no notable outdoor health concerns.

Today vs Normal

26°C+2° above normal

The long-term average high for today is 24°C.

13 of the last 28 days with published data ran above normal.

That's a break from the pattern - today's forecast runs above normal even though the recent stretch mostly ran below.

2026-08-28: 22°C22°2026-08-29: 23°C23°2026-08-30: 22°C22°2026-08-31: 23°C23°2026-09-01: 23°C23°2026-09-02: 27°C27°2026-09-03: 31°C31°2026-09-04: 25°C25°2026-09-05: 31°C31°2026-09-06: 25°C25°2026-09-07: 24°C24°2026-09-08: 22°C22°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Extended Outlook for Porto

Over the next 15 days, Porto is forecast to see temperatures ranging from 14°C to 36°C, averaging a daily high of 28°C. The extended outlook indicates predominantly dry and clear conditions throughout the period. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.