15-Day Weather Forecast - Cape Town

15-day weather forecast for Cape Town: temperatures from 11°C (52°F) to 27°C (81°F). Average daily high 20°C (68°F) over the next 15 days.

Hourly Forecast by Day

Today·11 Sep
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Temperature · peaks at +21°C

15-Day Temperature Trend

21°15°TodaySep20°16°Tmrw27°15°Sun16°13°Mon16°14°Tue16°12°Wed17°12°Thu19°13°Fri22°11°Sat21°14°Sun17°13°Mon20°13°Tue21°14°Wed27°14°Thu21°14°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +21°/+15°
    feels +20°0 mm · 4%29 km/hUV 6 · Mod
    06:5118:35
  • Sat, Sep 12Tomorrow
    +20°/+16°
    feels +18°1.0 mm · 44%28 km/hUV 3 · Mod
    06:4918:35
  • Sun, Sep 13Sun
    +27°/+15°
    feels +28°1.4 mm · 61%18 km/hUV 5 · Mod
    06:4818:36
  • Mon, Sep 14Mon
    +16°/+13°
    feels +15°7.4 mm · 88%30 km/hUV 6 · Hi
    06:4718:37
  • Tue, Sep 15Tue
    +16°/+14°
    feels +13°15.3 mm · 94%27 km/hUV 7 · Hi
    06:4518:37
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  • Wed, Sep 16Wed
    +16°/+12°
    feels +14°10.5 mm · 91%27 km/hUV 7 · Hi
    06:4418:38
  • Thu, Sep 17Thu
    +17°/+12°
    feels +14°0 mm · 4%29 km/hUV 6 · Hi
    06:4218:39
  • Fri, Sep 18Fri
    +19°/+13°
    feels +17°0 mm · 9%22 km/hUV 7 · Hi
    06:4118:39
  • Sat, Sep 19Sat
    +22°/+11°
    feels +23°9 km/hUV 7 · Hi
    06:4018:40
  • Sun, Sep 20Sun
    +21°/+14°
    feels +23°0 mm · 2%16 km/hUV 7 · Hi
    06:3818:41
  • Mon, Sep 21Mon
    +17°/+13°
    feels +12°0 mm · 4%37 km/hUV 7 · Hi
    06:3718:41
  • Tue, Sep 22Tue
    +20°/+13°
    feels +17°0 mm · 6%34 km/hUV 3 · Low
    06:3618:42
  • Wed, Sep 23Wed
    +21°/+14°
    feels +18°0 mm · 14%32 km/hUV 5 · Mod
    06:3418:43
  • Thu, Sep 24Thu
    +27°/+14°
    feels +28°0 mm · 27%17 km/hUV 5 · Mod
    06:3318:44
  • Fri, Sep 25Fri
    +21°/+14°
    feels +21°0.3 mm · 20%23 km/hUV 7 · Hi
    06:3118:44

Weather Insight

Cape Town's 15-day outlook ranges from a low of 11°C to a high of 27°C, with an average daytime high near 20°C. That's 4° above the long-term average high of 16°C for this time of year. It continues a recent pattern — 10 of the last 19 days with published data have run warmer than normal. Air quality is currently Moderate (AQI 56), driven mainly by PM2.5 at 11 μg/m³.

Today vs Normal

21°C+5° above normal

The long-term average high for today is 16°C.

10 of the last 19 days with published data ran above normal.

It continues that pattern - today's forecast is also running above normal.

2026-08-19: 16°C16°2026-08-20: 16°C16°2026-08-21: 17°C17°2026-08-22: 16°C16°2026-08-23: 16°C16°2026-08-24: 16°C16°2026-08-25: 17°C17°2026-08-26: 19°C19°2026-08-27: 17°C17°2026-08-28: 16°C16°2026-08-29: 15°C15°2026-08-30: 15°C15°

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

Air Quality

Air Quality
Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.

Extended Outlook for Cape Town

Over the next 15 days, Cape Town is forecast to see temperatures ranging from 10°C to 28°C, averaging a daily high of 20°C. The extended outlook indicates significant rainfall totalling 35.9 mm spread across 6 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.