Port St Johns weather in September 2025

Expect daytime maximum temperatures of 21°C in Port St Johns in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 77 mm of rainfall in the month.

  • 21°C maximum daytime temperature in September in Port St Johns21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Port St Johns10
    10 days with some rainfall
  • 14°C minimum night-time temperature in September in Port St Johns14
    14°C min night temperature
  • 12 hours of daylight per day in September in Port St Johns12
    12 hours of daylight per day
  • No heat & humidity in September in Port St Johns0
    No heat & humidity
  • 77 mm monthly rainfall in September in Port St Johns77
    77 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Port St Johns7
    7 (High) UV index
  • 21°C sea temperature in September in Port St Johns21
    21°C sea temperature

More about Port St Johns

Port St Johns by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Africa

TUI discount code: up to £300 off 2025/2026 holidays

  • Save up to £300 on package holidays in 2025/2026
  • Book in TUI sale. Discount varies by spend. T&Cs apply
  • Travel between 1st May 2025 & 31st Oct 2026 (inclusive)
Show discount codeShow discount code ******ALE
Redeem TUI discount code >>

Expires at 10:00 on Friday 28th Feb 2025 · View all TUI offers

TUITUI deal finder

The September weather guide for South Africa (Port St Johns) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about South Africa

How hot is it in Port St Johns in September?

Daytime temperatures usually reach 21°C in Port St Johns in September, falling to 14°C at night.

How sunny is it in Port St Johns in September?

There are normally 7 hours of bright sunshine each day in Port St Johns in September - that's 59% of daylight hours.

How warm is the sea around Port St Johns in September?

The average sea temperature around Port St Johns in September is 21°C.

Does it rain in Port St Johns in September?

There are usually 10 days with some rain in Port St Johns in September and the average monthly rainfall is 77mm.

Port St Johns September sunrise & sunset times

Browse the sunrise and sunset times for Port St Johns in September 2025. Select a month to view Port St Johns sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:18 17:46
Monday, 15th September 2025 06:00 17:54
Tuesday, 30th September 2025 05:41 18:03

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^