Komodo September 2026 Outlook: Hot Days and Extreme UV Risk

Labuan Bajo — Komodo Island is expected to remain hot through September 2026, with typical temperatures around 22°C to 31°C and a high risk of intense sun exposure, according to multiple weather services. The outlook is relevant for visitors planning park hikes, beach time and boat trips, but monthly figures remain a general guide rather than a substitute for day‑specific marine and safety information.

Weather25’s September 2026 overview for Komodo describes a hot month, with average daily minimum and maximum temperatures of about 22°C and 31°C. It indicates roughly three rainy days on its dashboard, alongside a broader range of three to eight rainy days during the month, 27 dry days and around 45 millimetres of rainfall. The same group of sites reports September daylight and sun exposure as relatively long, with around 11 to 12 hours of sunshine or bright conditions per day.

Related climate services present comparable ranges with some variation. EaseWeather notes that early September temperatures can reach an average of 33.3°C, easing to about 30.3°C by the end of the month, with highs around 33°C and lows near 21°C and a total of about 43 millimetres of rain over roughly 14 days.

NomadSeason’s Komodo profile gives an average September temperature of 26°C, with highs near 27°C and lows around 25°C, and about 12 millimetres of rain spread over three days, alongside roughly 10 hours of sunshine per day. A separate climate guide for Komodo Island describes September as hot, sunny and nearly dry, with daytime temperatures between 31°C and 33°C, minimal rain and a UV index around 10.

• Indicative temperature range: roughly 22°C–31°C on many days
• Rainy days: about 3–8, depending on the dataset
• Reported monthly rainfall: around 12–45 millimetres
• Average daily sunshine: about 10–12 hours

Forecast for Sunday, 20 September 2026

AccuWeather’s 10‑day forecast for Komodo shows Sunday, 20 September, with a daytime high of 85°F and an overnight low of 74°F, equivalent to about 29°C and 23°C. The forecast assigns a 55 percent chance of precipitation, describing conditions as variably cloudy with a shower in places, and notes that any showers are expected to be brief and localised.

For that date, AccuWeather lists a maximum UV index of 11, classified as extreme, and a “RealFeel” temperature of 100°F, or about 38°C, indicating that heat and humidity may make conditions feel significantly hotter than the measured air temperature. Wind is forecast from northeasterly directions at about 6 miles per hour, part of a generally light pattern for the period.

Over the rest of the 10‑day window around 20 September, the same forecast shows a mix of sunny, partly cloudy and showery days, with precipitation probabilities ranging from the mid‑20 percent range to over 50 percent on some dates. Many days within that period carry an extreme UV reading of 11 or 12, highlighting the need for sun protection during outdoor activities.

Practical implications for visitors

The combined outlook points to continued heat, intermittent showers and strong solar exposure across Komodo in September 2026. For visitors on exposed trails or open boats, these conditions support practical precautions such as carrying sufficient water, using effective sun protection, and planning shade breaks during the strongest midday sun.

Local tourism and diving operators describe September in Komodo as generally sunny, with light southeast winds and rare rain, and note that sea crossings inside the park are often among the calmest of the year. However, general land‑weather forecasts and climate averages do not replace official marine bulletins, nor do they confirm wave height, sea‑state conditions or harbour‑specific departure decisions for a given day.

Check marine and safety information

Travellers are advised to monitor up‑to‑date forecasts from official Indonesian meteorological services and to confirm conditions directly with boat operators before departure, especially when itineraries depend on crossing open water. Monthly averages and commercial forecast tools can help with packing and broad scheduling, but they cannot predict local squalls, rapidly changing wave conditions, underwater visibility or individual harbour operating decisions for 20 September or any other specific date.

Sources

• Weather25 – Komodo weather in September 2026
• Wetter2 – Komodo Wetter im September
• AccuWeather – Komodo 10‑Day Weather
• EaseWeather – Weather in Komodo in September 2026
• NomadSeason – September Weather in Komodo
• Bestereistijd – Komodo weer in September
• Where and When – Weather in Komodo island in September
• KomodoLuxury – Komodo in September: Weather, Diving & Real Booking Data
• Tiempo3 – Clima en Komodo en septiembre 2026