Manado weather in September
September in Manado: sweltering, soaked, with clean air — a gamble, with 20 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#3 of 12 months in Manado · #1215 of 1413 destinations to visit in September · comfort 55/100 (tier D)
- Days
- 34°C
- Nights
- 22°C
- Wet days
- 20
- Sun
- 10.1 h
- Humidity
- 85%
- Daylight
- 12 h
Traveller notes on Manado in September
Other months in Manado
Manado's own forum makes the case that February's rainy-season label is a bit misleading in practice: multi-week stretches without significant rain aren't unusual, and when it does fall it's typically overnight (clearing by morning) or a brief early-afternoon shower rather than an all-day soak. The muggy humidity is the more constant feature. Divers heading out to Bunaken should note the real weather risk isn't rain but wind - a few posters mentioned choppy seas grounding dive boats on windier days, more than any rain shower would.
Forum posters describe August as nominally the middle of the dry season, but at least one visitor reported near-daily afternoon rain for almost two weeks despite that - a reminder that the 'dry' label doesn't guarantee dry days here. High wind and rough seas can also cancel dive boats on a given day. One geographic tip that comes up often: staying out on the islands (Bunaken, Siladen, Gangga) rather than the Manado mainland tends to mean less rain exposure. Regardless of the weather, posters are clear diving itself isn't much affected since you're wet either way, and Bunaken National Marine Park remains the headline draw for both diving and snorkeling day trips.
Add your own note from Manado's card on the map.
Manado climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Manado 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.
Busyschool holidays in 3 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Manado'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 weatherManado's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Manado in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Lokon and Soputan alerts
1 Jan – 31 DecVolcanic activityClosuresTwo of Indonesia's busier volcanoes sit within an hour of the city and the agency raises their status several times a decade, closing the Tomohon crater walks and occasionally dusting the airport. Source ↗
- Season
Calmest months for Bunaken
1 May – 30 Sep · usuallyDive seasonThe drier stretch either side of midyear is when the crossing out to Bunaken is flattest and the wall dives are at their clearest. Boats go year-round; these are the weeks they go easily.
- Season
Wet season
MonsoonRisk20 rainy days and about 248 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Where is Manado?
Manado in September — FAQ
- Is September a good time to visit Manado?
- September in Manado: sweltering, soaked, with clean air — a gamble, with 20 rainy days. It ranks #3 of 12 months for Manado on SeasonMap's comfort score (55/100).
- What is the weather like in Manado in September?
- In September, Manado averages a daily high of 34.2°C and a low of 22.4°C, with about 247.9 mm of rain over roughly 20.1 rainy days.
- What is the air quality in Manado in September?
- Manado has a mean US Air Quality Index of about 35 in September.