Mozambique's National Institute of Meteorology (INAM) has forecast rain, thunderstorms and strong winds — with gusts reaching up to 70 kilometres per hour — capable of generating waves of up to five metres along the country's northern coastline from the morning of Saturday, 14 June. The alert also covers the provinces of Niassa, Cabo Delgado, Nampula and Zambézia, where adverse weather conditions are expected, according to Jornal Notícias.

According to a warning issued by INAM on Friday, 13 June, at 14:00, the rough sea conditions are expected to affect the oceanic strip between latitudes 12 and 19 degrees South, extending up to 50 nautical miles from the Mozambican coast.

The meteorological bulletin, valid until midnight on Saturday, 14 June, indicates that wind intensity could cause a significant deterioration in sea conditions, increasing risks for maritime navigation and activities carried out in coastal areas.

In addition to rough seas, the institute forecasts that the effects of strong winds will be accompanied by rain and thunderstorms across the four affected provinces, although the bulletin does not specify the most exposed districts or expected rainfall volumes.

The forecast conditions could pose risks to artisanal fishing, maritime transport and the movement of small vessels, particularly in areas where wind intensity and wave height make navigation difficult.

In response to the outlook, INAM has recommended that communities and maritime operators adopt precautionary and safety measures to reduce exposure to risks associated with the adverse weather conditions.

The alert comes against a backdrop of vulnerability among Mozambique's coastal regions to extreme weather events, particularly during the rainy season, when heavy rainfall and strong winds can compromise community safety and disrupt economic activities.

The forecast underscores the need for continued monitoring of weather conditions, especially among communities dependent on fishing and maritime transport — activities particularly sensitive to wind intensity and sea state.

The warning does not include estimates of economic losses, does not indicate a suspension of maritime activities, and does not establish specific restrictions on vessel movement.

INAM classified the communication as a single bulletin and reiterated its recommendation that preventive measures be adopted, given the risks associated with strong winds, rain and thunderstorms across the affected regions.