List of off-season South Pacific tropical cyclones

The official database provided by the International Best Track Archive for Climate Stewardship, which dates back to 1892, shows that 56 tropical cyclones have existed in the basin during the off-season between May and October, while in addition 36 other systems that are not included in IBTRACS have monitored by the warning centres.

The deadliest and most damaging system was Severe Tropical Cyclone Namu, which caused over 100 deaths, when it impacted the Solomon Islands during May 1986.

Tropical cyclones are considered to be non-frontal, low pressure systems that develop, within an environment of warm sea surface temperatures and little vertical wind shear aloft.

[1] Within the South Pacific basin to the east of 160°E, the cyclone season is defined as running between November 1 and April 30 of the following year.

[2] The most recent systems to exist in the off-season were Severe Tropical Cyclone Lola, which developed during October 2023.

The deadliest and most damaging system was Severe Tropical Cyclone Namu, which caused over 100 deaths, when it impacted the Solomon Islands during May 1986.