30YearWeather
Diani Beach in September
Diani Beach weather in September - Kenya
😊Warm & Pleasant

Diani Beach Weather in September

Plan your September trip to Diani Beach, Kenya. Based on 30 years of NASA data, expect temperatures of 27°C (high) to 23°C (low), with 26% rain probability and 8 hours of daily sunshine. The Coastal Waters averages 27°C in September. Pack rain gear for around 16 rainy days.

Avg High
27°C

Hottest around day 30

Avg Low
23°C

Coolest around day 1

Rainy Days
16days

26% avg rain chance

Sunshine
8hrs/day

Autumn season

Sea Temperature in September

Coastal Waters(Ocean)

27.3°C

Monthly Average

Water Feel
🌴Tropical

Perfect for swimming and water sports

Swim Rating
✅Excellent for swimming

Based on average sea surface temperature

Body of Water
Coastal Waters

Ocean

Diani Beach coastline

Diani Beach September Weather Calendar

Click any day to see detailed weather information

Day 1
cloudy
Cloudy
27°C38%
Day 2
cloudy
Cloudy
27°C37%
Day 3
cloudy
Cloudy
27°C33%
Day 4
cloudy
Cloudy
27°C29%
Day 5
cloudy
Cloudy
27°C27%
Day 6
cloudy
Cloudy
27°C21%
Day 7
cloudy
Cloudy
27°C22%
Day 8
cloudy
Cloudy
27°C21%
Day 9
cloudy
Cloudy
27°C25%
Day 10
cloudy
Cloudy
27°C25%
Day 11
cloudy
Cloudy
27°C29%
Day 12
cloudy
Cloudy
27°C29%
Day 13
cloudy
Cloudy
27°C31%
Day 14
cloudy
Cloudy
27°C29%
Day 15
cloudy
Cloudy
27°C27%
Day 16
cloudy
Cloudy
27°C26%
Day 17
cloudy
Cloudy
27°C25%
Day 18
cloudy
Cloudy
27°C27%
Day 19
cloudy
Cloudy
28°C27%
Day 20
cloudy
Cloudy
28°C28%
Day 21
cloudy
Cloudy
28°C29%
Day 22
cloudy
Cloudy
28°C29%
Day 23
cloudy
Cloudy
28°C25%
Day 24
cloudy
Cloudy
28°C22%
Day 25
cloudy
Cloudy
28°C22%
Day 26
cloudy
Cloudy
28°C21%
Day 27
cloudy
Cloudy
28°C21%
Day 28
cloudy
Cloudy
28°C23%
Day 29
cloudy
Cloudy
28°C22%
Day 30
cloudy
Cloudy
28°C21%

Essential Travel Info for Diani Beach

🗓️ Best Time to Visit📖 Travel Guide🍴 Food Guide

Currency

KES

Sh Kenyan shilling

Language

English

+1 more

Driving

Left side

Connect

Most long distance connections (bus, tra...

Safety

Moderate Safety

GPI: 2.303

Travel Intelligence

Exclusive flight analytics & health data for Diani Beach

Smart Flight Estimator

Airport-to-Airport Logistics

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Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Remote
3/ 100
Traffic Index

Off the beaten path

Peak Daily Arrivals

0

slots per day

Peak

Apr

Low

Jun

Monthly Traffic Distribution

7
Jan
6
Feb
5
Mar
7
Apr
5
May
4
Jun
5
Jul
5
Aug
5
Sep
5
Oct
5
Nov
5
Dec
Traffic Level
Low Season

Key Connections

Nairobi Wilson (WIL)
Nairobi Jomo Kenyatta (NBO)

Health & Safety Advisory

CDC travel health recommendations

13 Recommendations
COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Chikungunya

All travelers should take steps to prevent mosquito bites. Chikungunya vaccination is generally not recommended. Travelers who wish to consider vaccination can visit “What to consider before traveling” on thechikungunya vaccinespage to learn more.

Cholera

Areas of active cholera transmission arelocalizedto the counties of Garissa (last case reported 3-6 months ago), Kisumu (last case reported 6-9 months ago), Kwale (last case reported 6-9 months ago), Migori (last case reported in the past 3 months), Mombasa (last case reported 6-9 months ago), Nairobi (last case reported in the past 3 months), Narok (last case reported in the past 3 months), and Turkana (last case reported 3-6 months ago) in Kenya. Cholera is rare in travelers.Certain factorsmay increase the risk of getting cholera or having severe disease (more information). Avoiding unsafe food and water and washing your hands can also help prevent cholera.Vaccination may be considered for children and adults who are traveling to areas of active cholera transmission.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Kenya.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Kenya. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Kenya.

Malaria

CDC recommends that travelers going to certain areas of Kenya take prescription medicine to prevent malaria. Depending on the medicine you take, you will need to start taking this medicine multiple days before your trip, as well as during and after your trip. Talk to your doctor about which malaria medication you should take.Transmission areasAll areas (including game parks) <2,500 m (<8,200 ft) elevation; rare cases in the highly urbanized central part of the city of Nairobi (the capital)Drug resistanceChloroquineSpeciesP. falciparum(primarily)P. malariae,P. ovale, andP. vivax(less commonly)Recommended chemoprophylaxisAtovaquone-proguanil, doxycycline, mefloquine, tafenoquine2Highly urbanized central part of the city of Nairobi: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only)4Updated April 23, 2025See footnotes

+7 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Diani Beach?

👍Very good conditions overall
Short Answer

Ideal beach conditions in Diani Beach during September: 27.3°C turquoise waters, 27°C air, 26% rain. 1.3m calm waves suit families and swimmers alike.

Decision Factors

Vaccinations required

Yellow Fever

Warm tropical seas

27.3°C sea temperature - Tropical Bath

Very high humidity

80% average humidity

Health precautions needed

Be aware of: Leptospirosis, Melioidosis, Schistosomiasis

Plenty of sunshine

10.9h of sunshine daily

Shoulder season - balanced conditions

71% of peak - good value with moderate crowds

Good For

  • 🏖️
    Beach lovers

    27.3°C warm seas and 26% rain probability

  • 📸
    Photographers

    10.9h sunshine, 57% clear skies for golden hour shots

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

  • 🎯
    Adventure seekers

    1.31m waves - good for surfing and water sports

Who Should Avoid

  • 👴
    Elderly travelers

    80% humidity creates difficult conditions

Related Guides

Best Time to VisitWhen to AvoidDiani Beach Overview
900 observations30-year historical data
Confidence: 99%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Diani Beach in September averages 27°C with 26% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Diani Beach in September

What are the temperatures in Diani Beach in September?

Daytime highs average 27°C, nights drop to 23°C. Temperatures remain fairly consistent.

How many rainy days in Diani Beach in September?

Expect around 16 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Diani Beach in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Diani Beach?

This is shoulder season—moderate prices and manageable crowds.