15-Day Weather Forecast - Sydney

15-day weather forecast for Sydney: temperatures from 9°C (48°F) to 27°C (81°F). Average daily high 22°C (72°F) over the next 15 days.

Hourly Forecast by Day

Today·12 Sep
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Temperature · peaks at +20°C

15-Day Temperature Trend

20°10°TodaySep21°12°Tmrw27°13°Mon21°14°Tue15°11°Wed16°10°Thu23°9°Fri20°14°Sat22°13°Sun26°14°Mon20°17°Tue23°16°Wed26°15°Thu21°12°Fri27°10°Sat
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Sat, Sep 12Today
    +20°/+10°
    feels +20°16 km/hUV 6 · Hi
    05:5917:44
  • Sun, Sep 13Tomorrow
    +21°/+12°
    feels +23°21 km/hUV 6 · Hi
    05:5717:45
  • Mon, Sep 14Mon
    +27°/+13°
    feels +26°0.7 mm · 35%17 km/hUV 6 · Mod
    05:5617:45
  • Tue, Sep 15Tue
    +21°/+14°
    feels +21°0 mm · 41%29 km/hUV 6 · Hi
    05:5517:46
  • Wed, Sep 16Wed
    +15°/+11°
    feels +11°0 mm · 31%29 km/hUV 6 · Hi
    05:5317:47
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  • Thu, Sep 17Thu
    +16°/+10°
    feels +15°0 mm · 21%22 km/hUV 5 · Mod
    05:5217:47
  • Fri, Sep 18Fri
    +23°/+9°
    feels +23°0 mm · 4%18 km/hUV 7 · Hi
    05:5017:48
  • Sat, Sep 19Sat
    +20°/+14°
    feels +21°0 mm · 4%17 km/hUV 7 · Hi
    05:4917:49
  • Sun, Sep 20Sun
    +22°/+13°
    feels +23°0 mm · 1%14 km/hUV 7 · Hi
    05:4817:49
  • Mon, Sep 21Mon
    +26°/+14°
    feels +28°0 mm · 12%16 km/hUV 5 · Mod
    05:4617:50
  • Tue, Sep 22Tue
    +20°/+17°
    feels +21°0 mm · 17%17 km/hUV 7 · Hi
    05:4517:51
  • Wed, Sep 23Wed
    +23°/+16°
    feels +24°0 mm · 18%20 km/hUV 7 · Hi
    05:4417:52
  • Thu, Sep 24Thu
    +26°/+15°
    feels +26°0 mm · 35%22 km/hUV 6 · Hi
    05:4217:52
  • Fri, Sep 25Fri
    +21°/+12°
    feels +20°2.4 mm · 33%32 km/hUV 7 · Hi
    05:4117:53
  • Sat, Sep 26Sat
    +27°/+10°
    feels +26°0 mm · 23%29 km/hUV 6 · Hi
    05:3917:54

Weather Insight

Sydney's 15-day outlook ranges from a low of 9°C to a high of 27°C, with an average daytime high near 22°C. That's 3° above the long-term average high of 19°C for this time of year. It continues a recent pattern — 22 of the last 28 days with published data have run warmer than normal. Air quality is currently Moderate (AQI 82), driven mainly by PM2.5 at 31 μg/m³.

Today vs Normal

20°C+1° above normal

The long-term average high for today is 19°C.

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

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

2026-08-28: 18°C18°2026-08-29: 18°C18°2026-08-30: 19°C19°2026-08-31: 20°C20°2026-09-01: 23°C23°2026-09-02: 24°C24°2026-09-03: 23°C23°2026-09-04: 21°C21°2026-09-05: 26°C26°2026-09-06: 20°C20°2026-09-07: 21°C21°2026-09-08: 17°C17°

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 Sydney

Over the next 15 days, Sydney is forecast to see temperatures ranging from 9°C to 28°C, averaging a daily high of 22°C. The extended outlook indicates occasional showers on 2 days, with 3.1 mm total accumulation. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.