Tropical Cyclone Signals

Effective since April 17, 2018.

The following was excerpted from Executive Order No.61/2018.

Tropical Cyclone Signals

Signs and Light Signals*

Meaning of Tropical Cyclone Signals

Safety Precautions

Signal No.1

Precaution Signal. A tropical cyclone is centred within 800 km of Macao and may affected Macao.


(1) Prepare preventive measures and pay close attention to the latest information on tropical cyclones.
(2) Check the safety of objects (flower pots, antennas, etc.) that may be blown down or destroyed by the winds.
(3) Check, repair and reinforce the facilities such as scaffolds and hoardings. Clear the drains.
(4) Check the stability and safety of the construction facilities. Make sure that the material will not be blown or dropped.
(5) Vessels should take all shelter measures and consider to seek shelter in haven.

Signal No.3

Under the influence of a tropical cyclone, winds with sustained speed of 41 to 62 km/h is expected or blowing and the gust may exceed 110 km/h in Macao.


(1) Complete all preventive measures as soon as possible.
(2) Check the stability of doors, windows and items in balconies. Keep the drains clear.
(3) Ensure the safety of the vessels and the stability of the offshore facilities. Vessels should seek shelter.
(4) Ensure the stability of containers and other facilities to prevent being blown down by the strong winds.
(5) Pay close attention to the latest information on tropical cyclones and adjust outdoor activities accordingly.
(6) Temporary squally showers may occur in Macao once being affected strong rainband. People in open spaces should be vigilant. Drivers should pay attention to driving safety and strong winds.
(7) Winds may be strong over the cross-sea bridges occasionally. Motorcyclists are advised to drive through the motor cycle lane on San Van Bridge (Ponte de Sai Van) when traveling between Macao and Taipa.
(8) Pay attention to the issue and latest message of the Storm Surge Warning.

Signal No.8NE

The tropical cyclone continues to approach Macao. Winds with sustained speed of 63 to 117 km/h is expected or blowing and the gust may exceed 180 km/h in Macao. Signal No.8 is further divided into Signal No.8NE, Signal No.8SE, Signal No.8SW and Signal No.8NW, which indicates the possible wind direction in the next few hours.


(1) Complete all preventive measures, such as locking doors and windows, strengthening the glass on exposed side.
(2) All schools are suspended.
(3) Stay indoor as far as possible. Stay away from exposed doors and windows. Continue to pay attention to the latest information on tropical cyclones.
(4) Suspend all outdoor and marine activities.
(5) The prevailing wind direction will change because of the variation of the distance and direction of tropical cyclones from Macao. The places that are sheltered from the strong winds originally may become exposed. Public are advised not to relax their guard.
(6) The cross-sea bridges will be closed at any time. Public should pay attention to the latest notice.
(7) Pay attention to the issue and latest message of the Storm Surge Warning.

Signal No.8SE

Signal No.8SW

Signal No.8NW

Signal No.9

The tropical cyclone is further approaching Macao. In Macao, winds with sustained speed of 63 to 117 km/h is blowing and intensifying/expected to intensify significantly.


(1) Suspend all outdoor and marine activities.
(2) Stay indoor as far as possible. Stay away from exposed doors and windows.
(3) Tropical cyclones will have a serious impact on Macao.
(4) A temporary lull means that the tropical cyclones is centred nearby and a sudden resumption of violent winds is expected. The places that are sheltered from the strong winds originally may become exposed. Public are advised not to relax their guard and pay close attention to the latest message of tropical cyclone.
(5) Pay attention to the issue and latest message of the Storm Surge Warning.

Signal No.10

The centre of the tropical cyclone shall strike at the immediate approaches of Macao. Winds with sustained speed exceeds 118 km/h is expected or blowing in Macao, accompany with gust of great intensity.

* The Tropical Cyclone Signals are hoisted or lowered by Cultural Affairs Bureau and Marine and Water Bureau at the Mount Fortress and the Guia Fortress respectively.