The Philippines can expect a mix of weather conditions across the archipelago, with the Intertropical Convergence Zone (ITCZ) and Easterlies influencing the forecast, according to PAGASA's 4:00 AM update issued on May 18, 2026.
National Weather Overview
PAGASA reports that the ITCZ is currently affecting southern Mindanao, while Easterlies are impacting the Visayas and the rest of Mindanao. Localized thunderstorms are expected in Metro Manila and the rest of Luzon. These conditions may bring scattered rains and thunderstorms nationwide.
Regional Forecasts
Luzon
Metro Manila and the rest of Luzon will experience partly cloudy to cloudy skies with isolated rainshowers or thunderstorms. PAGASA warns of possible flash floods or landslides during severe thunderstorms. Residents are advised to monitor for updates and take necessary precautions, especially in areas prone to flooding.
Visayas
The Visayas region can expect partly cloudy to cloudy skies with isolated rainshowers or thunderstorms due to the Easterlies. PAGASA cautions that severe thunderstorms could lead to flash floods or landslides. The public is advised to stay informed and prepared for potential weather disturbances.
Mindanao
The weather in Mindanao will vary depending on the sub-region. The Zamboanga Peninsula, BARMM, SOCCSKSARGEN, and Davao Region are under the influence of the ITCZ, leading to cloudy skies with scattered rains and thunderstorms. PAGASA warns of possible flash floods or landslides due to moderate to, at times, heavy rains. The rest of Mindanao will experience partly cloudy to cloudy skies with isolated rainshowers or thunderstorms due to the Easterlies, also carrying the risk of flash floods or landslides during severe thunderstorms.
Wind and Coastal Water Conditions
PAGASA's forecast includes information on wind and coastal water conditions. Extreme Northern Luzon will experience moderate winds from the northeast to east, with moderate coastal waters (1.2 to 2.5 meters wave height). The rest of Luzon will have light to moderate winds from the northeast to north, with slight to moderate coastal waters (0.6 to 1.8 meters). Across the rest of the country, light to moderate winds from the east to northeast are expected, with slight to moderate coastal waters (0.6 to 1.2 meters).
Temperature and Humidity
Yesterday's temperature readings at the PAGASA Weather Station in Science Garden, Diliman, Quezon City, recorded a maximum temperature of 33.2°C at 2:00 PM and a minimum temperature of 25.4°C at 5:00 AM. The relative humidity ranged from 57% to 94%.
Tidal Predictions for Manila Bay
According to NAMRIA, today's high tide in Manila Bay occurred at 10:11 AM (1.37 meters), and the low tide is expected at 6:43 PM (-0.35 meters). There is no high tide or low tide predicted for tomorrow as of this PAGASA update.
Safety Precautions
With the forecast of scattered rains and thunderstorms across the Philippines, PAGASA advises the public to take the following safety precautions:
- Stay updated with the latest weather forecasts from PAGASA.
- Avoid crossing flooded areas.
- If living in a flood-prone area, be prepared to evacuate to higher ground.
- Unplug electrical appliances during thunderstorms.
- Monitor water levels in rivers and streams.
- Prepare a Go Bag with essential supplies in case of emergency.
- Keep children away from floodwaters to prevent waterborne diseases.
- Report any flooding or landslides to local authorities.
PAGASA Monitoring
Monitor official PAGASA updates at pagasa.dost.gov.ph for the latest weather information and advisories.