SeasonMapWatamu weather in September
Kenya
September in Watamu: warm, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Watamu · #205 of 1383 destinations to visit in September · comfort 91/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Watamu in September
No notes yet. Open Watamu on the map to add the first one.
Watamu climate normals — September
| Daytime high | 28°C / 82°F | 🌤 warm |
|---|---|---|
| Nighttime low | 24°C / 74°F | |
| Sea temperature | 27°C / 80°F | 😎 warm sea |
| Rainfall | 36 mm / 1.4 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 21°C / 69°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 12.1 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Watamu in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Watamu's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherWatamu's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Watamu in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Green turtle nesting
1 Apr – 31 Oct · usuallyGreen, hawksbill and olive ridley turtles come up Watamu's beaches to nest through the middle of the year, peaking from April to October. Local Ocean Conservation's night patrols protect the nests, and hatchlings follow roughly two months behind. Source ↗
- Season
Kusi, the windy season
1 Jul – 30 SepWind seasonThe southeast monsoon blows harder and the sea turns choppy, which favours kitesurfers over snorkellers and thins out the marine park's boat traffic. Source ↗
Nearby, and something's on
Within 300 km of Watamu — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Watamu?
Watamu in September — FAQ
- Is September a good time to visit Watamu?
- September in Watamu: warm, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Watamu on SeasonMap's comfort score (91/100).
- What is the weather like in Watamu in September?
- In September, Watamu averages a daily high of 27.8°C and a low of 23.5°C, with about 35.6 mm of rain over roughly 11 rainy days.
- What is the air quality in Watamu in September?
- Watamu has a mean US Air Quality Index of about 39 in September.
Other months in Watamu
Compare Watamu in September
Warmer or cooler than Watamu in September
Similar destinations in East Africa — September
Within 300 km: Lamu's Maulidi around 15 Jul – 30 Sep, and Mombasa's Kusi, the cool monsoon around 15 Jun – 30 Sep.