Three weather systems will cause rain over most areas of the country, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said on Monday.
The shear line will bring scattered rains and isolated thunderstorms across Eastern Visayas, Bicol Region, Mimaropa, and Quezon.
It will also cause moderate to heavy rains over Quezon, Catanduanes, Camarines Norte, Camarines Sur, Albay, Sorsogon, and Northern Samar.
The easterlies will cause scattered rains and thunderstorms across Caraga and Davao Region.
Rains caused by the northeast monsoon will prevail over Metro Manila, Cagayan Valley, Cordillera Administrative Region, Aurora, Bulacan, Cavite, Laguna, Batangas, and Rizal.
Moderate to heavy rains in the aforementioned areas could result in flash floods or landslides, PAGASA said.
Meanwhile, the rest of Luzon will experience isolated light rains due to the northeast monsoon. In contrast, isolated rain showers due to the easterlies will prevail over the rest of the archipelago.
Strong to gale winds and rough to very rough coastal waters are forecast in Northern Luzon and the eastern sections of Central and Southern Luzon.
The rest of Luzon and the Visayas will have moderate to strong winds and moderate to rough seas.
Elsewhere, winds will be light to moderate with slight to moderate seas.
PAGASA, meanwhile, said no low pressure area was monitored for possible tropical cyclone formation. (PNA)