Cape Town in September
In September, Cape Town averages 19°C (66°F) during the day and 9°C (48°F) at night, with around 8 days of rain (40 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Occasional showers are likely but won't dominate.
September is a great month to visit Cape Town: pleasant temperatures and relatively few wet days.
How September compares to the rest of the year in Cape Town
September is in the middle of the year for warmth in Cape Town (9th of 12) and moderately rainy compared to the rest of the year (6th of 12). Daytime temperature runs 3°C below the annual average (22°C). September runs 1°C warmer than August (18°C) and warms a further 2°C into October (21°C).
September sunrise & sunset in Cape Town
Times shown for Cape Town local time (Africa/Johannesburg), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Cape Town — September
Golden-hour and blue-hour windows for the 15th of September, in Cape Town's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Cape Town in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Cape Town's popularity.
Crowds & pricing — September in Cape Town
This is a busy month in Cape Town — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Cape Town
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Cape Town — September
Cape Town's sea temperature barely shifts through the year — within 1.6°C of itself, month to month.
Cape Town in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 26°C / 79°F | 16°C / 61°F | 15 mm | 4 | — |
| February | 27°C / 81°F | 16°C / 61°F | 17 mm | 4 | — |
| March | 25°C / 77°F | 14°C / 57°F | 20 mm | 5 | — |
| April | 23°C / 73°F | 12°C / 54°F | 41 mm | 8 | — |
| May | 20°C / 68°F | 9°C / 48°F | 69 mm | 10 | — |
| June | 18°C / 64°F | 8°C / 46°F | 93 mm | 11 | — |
| July | 17°C / 63°F | 7°C / 45°F | 82 mm | 12 | — |
| August | 18°C / 64°F | 8°C / 46°F | 77 mm | 11 | — |
| September | 19°C / 66°F | 9°C / 48°F | 40 mm | 8 | — |
| October | 21°C / 70°F | 11°C / 52°F | 30 mm | 7 | — |
| November | 24°C / 75°F | 13°C / 55°F | 14 mm | 5 | — |
| December | 25°C / 77°F | 15°C / 59°F | 17 mm | 4 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Cape Town in September →
Frequently asked questions
How hot is Cape Town in September?
In September, Cape Town averages a high of 19°C (66°F) and a low of 9°C (48°F) — generally mild and pleasant.
Does it rain a lot in Cape Town in September?
September sees occasional rain in Cape Town, with about 8 rainy days on average.
Is September a good time to visit Cape Town?
September is mild and pleasant. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Cape Town in September?
Pack light layers for warm days and cooler evenings. See the full September packing list for Cape Town for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.