September weather forecast
Solomon Islands

September in the Solomon Islands marks the start of the transition back towards the wetter part of the year. However, this shift is gradual, and the month remains relatively dry compared to the peak wet season. Average rainfall in September ranges from 100mm (3.94") to 150mm (5.91").

The temperature patterns in September are consistent with those of August. The average daytime highs usually reach around 29°C (84.2°F), while nighttime lows hover around 23°C (73.4°F). The combination of slight increases in rainfall and steady temperatures provides a comfortable climate, making it suitable for a wide range of activities.

Honiara, the capital city, shares these weather patterns, experiencing slightly increased rainfall and consistent temperatures. The risk of cyclones remains low in September, and the weather is generally predictable.

Comparing September to the upcoming month of October, the weather in the Solomon Islands becomes gradually wetter as the transition towards the wet season continues. However, October temperatures remain stable, similar to those experienced in September. This balance of conditions ensures that the natural beauty of the islands remains accessible and enjoyable for visitors.

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• Honiara - September »
  In Honiara, Solomon Islands, in September, the average water temperature is 28.8°C (83.8°F). The months with the highest UV index in Honiara, Solomon Islands, are April, May, July and September, with an average maximum UV index of 7.
• Gizo - September »
  August and September, with an average sea temperature of 28.3°C (82.9°F), are months with the coldest seawater in Gizo. January through April, September through December bring Gizo's average highest temperatures, reaching a high of 31°C (87.8°F).
• Auki - September »
  In Auki, Solomon Islands, the average sunshine duration in September is 6h. September in Auki marks another decrease in rainfall to 211mm (8.31"), maintaining a balance between high temperatures and precipitation.
• Buala - September »
  In Buala in September, during 24.8 rainfall days, 136mm (5.35") of precipitation is typically accumulated. On the first day of September in Buala, Solomon Islands, sunrise is at 06:22 and sunset at 18:20.
• Munda - September »
  August and September, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Munda. Munda, in the month of September, notes an average low temperature of 26.4°C (79.5°F), indicating a small decrease from the daytime highs.
• Noro - September »
  In Noro in September, during 27.1 rainfall days, 248mm (9.76") of precipitation is typically accumulated. In Noro during September, the rain falls for 27.1 days and regularly aggregates up to 248mm (9.76") of precipitation.
• Rennell Island - September »
  The months with the least sunshine in Rennell Island are January through July, September and December, with an average of 6h of sunshine. The months with the least sunshine in Rennell Island are January through July, September and December, with an average of 6h of sunshine.
• Seghe - September »
  August and September, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Seghe. August and September, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Seghe.
• Aola - September »
  In Aola, Solomon Islands, in September, during 26 rainfall days, 162mm (6.38") of precipitation is typically accumulated. On the first day of September in Aola, Solomon Islands, sunrise is at 06:20 and sunset at 18:16.
• Tulagi Island - September »
  On the first day of September in Tulagi Island, Solomon Islands, sunrise is at 06:21 and sunset at 18:17. On the last day of September, in Tulagi Island, sunrise is at 06:04 and sunset at 18:14 +11.
• Poroporo - September »
  During January through April, September through December, Poroporo registers its highest temperatures, averaging a high of 30°C (86°F). During January through April, September through December, Poroporo experiences its peak temperatures, averaging a high-temperature of 30°C (86°F).
• Yandina - September »
  The coldest period in Yandina falls in June, July, September and October, when the average high-temperature reaches 30°C (86°F). Yandina's coldest season falls during June, July, September and October, averaging a high-temperature of 30°C (86°F).