September · Kenya
Best time to visit Diani Beach in September Weather, crowds & prices
Weather in Diani Beach in September
Average temperature 25°C, 142 mm of rain, about 27 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.7/10
Ranked #9 of 12 months
- Avg temp
- 25°C
- Rainfall
- 142 mm
- Humidity
- 78%
- Days with 6h+ sun
- 27
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Diani Beach scores 7.7/10 for beach and coastal travel - ranked #9 of 12. Expect around 25°C, 142 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Diani Beach stretches white sand south of Mombasa with coral reefs, colobus monkeys, and monsoon-timed surf. Best window: the drier months outside peak monsoon.
September in Diani Beach: strong conditions, 9th of 12
With 25°C (78°F) on average, September delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
142 mm of rain makes this a wet month here, though with about 27 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.7/10 on the same scale — 9th of 12 months, versus 9.8/10 for the best month here.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, January is materially better in Diani Beach — 2.1 points higher on the same scale.
Frequently asked
- What is the weather like in Diani Beach in September?
- In September, Diani Beach averages 25°C, 142 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 7.7/10.
- Is September a good time to visit Diani Beach?
- September earns a 7.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Diani Beach in September?
- Expect about 142 mm of rain in September. Average humidity is 78% and there are about 27 days with 6+ hours of sunshine.
Curated in Diani Beach
Tickets & experiences
Things to do in Diani Beach
Diani Beach, Kenya. Live activities and tours from GetYourGuide, matched to this destination.