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Cyclones in Tonga

Cyclones only occur occasionally in Tonga. On average, they happen about 2 times a year. The hardest hit regions are Niuas and Vava‘u.

The typical cyclone season depends on the summer monsoon. In the months before (May to June) and after (October to November), the most severe storms occur.

Tonga has certainly been affected by the foothills of several cyclones, but during the past 12 months no cyclone reached the inhabited areas on land.

Other natural hazards in Tonga:
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› Earthquakes
› Tsunamis
› The most severe cyclones in the world


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28.05.2023 © CIMSS University of Wisconsin-Madison

Most violent cyclones in Tonga since 2018

Zazu: December 13-16, 2020

Wind speed:
max. 100 km/h
on land:
max. 94 km/h
Diameter:
max. 296 km
Air pressure:
below 985 mbar
Saffir-Simpson scale:
tropical storm
Affected regions
Niuas
Vava‘u

Zazu: December 12-16, 2020

Wind speed:
max. 102 km/h
on land:
max. 96 km/h
Diameter:
max. 704 km
Air pressure:
below 980 mbar
Saffir-Simpson scale:
tropical storm
Affected regions
Niuas
Vava‘u
Ha‘apai

Wasi: February 20-23, 2020

Wind speed:
max. 111 km/h
on land:
max. 83 km/h
Diameter:
max. 537 km
Air pressure:
below 975 mbar
Saffir-Simpson scale:
tropical storm
Affected regions
Niuas
Vava‘u

Vicky: February 20-24, 2020

Wind speed:
max. 78 km/h
on land:
max. 37 km/h
Diameter:
max. 759 km
Air pressure:
below 990 mbar
Saffir-Simpson scale:
tropical storm
Affected regions
Eua

Pola: February 25 to March 3, 2019

Wind speed:
max. 180 km/h
Diameter:
max. 204 km
Eye:
max. 37 km
Air pressure:
below 950 mbar
Saffir-Simpson scale:
category 3
The cyclone did not make direct landfall in Tonga. On February 26th, 2019 at 4:00 pm it had the shortest distance at about 157 km east of Hihifo in Niuas.
Instead, the first landfall occurred near Mata-Utu in Wallis and Futuna on February 26th at 1:00 am.

Neil: February 9-10, 2019

Wind speed:
max. 69 km/h
Diameter:
max. 370 km
Air pressure:
below 994 mbar
Saffir-Simpson scale:
tropical storm
Affected regions
Ha‘apai
Tongatapu
Eua


These evaluations are based on data from the National Centers for Environmental Information of the National Oceanic and Atmospheric Administration (NOAA). Individual data have been summarized or translated.
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