The southwest monsoon is asserting its presence across the Philippines on Wednesday, June 3, 2026, bringing widespread rains, strong winds, and rough coastal waters to large portions of Luzon, while the rest of the country contends with localized thunderstorms. PAGASA issued its 24-hour public weather forecast at 4:00 AM today, valid until 4:00 AM on June 4, urging residents — particularly those in low-lying and mountainous areas — to remain vigilant against flash floods and landslides.
National Weather Overview
The southwest monsoon, locally known as habagat, is currently the dominant weather system affecting Northern Luzon, Central Luzon, and the western section of Southern Luzon, according to PAGASA. Its influence is being felt most strongly along the western coast of the country, where moisture-laden winds from the southwest are funneling heavy rainfall onto already saturated terrain. Meanwhile, the rest of the archipelago — from the eastern portions of Luzon down through the Visayas and Mindanao — is experiencing weather disturbances driven by localized thunderstorms.
PAGASA has flagged flash floods and landslides as the primary hazards for today across multiple regions, making it essential for residents in flood-prone lowlands and communities near mountain slopes to monitor conditions closely and heed advisories from their local government units and disaster management offices.
Luzon Forecast
Metro Manila and Surrounding Provinces
Residents of Metro Manila should prepare for occasional rains throughout the day, driven directly by the southwest monsoon. The same conditions apply to the provinces of Pangasinan, Zambales, Bataan, Tarlac, Pampanga, Bulacan, Cavite, Batangas, Occidental Mindoro, and Palawan. PAGASA warns that rainfall in these areas may reach moderate to heavy intensities, raising the risk of flash floods in low-lying communities and landslides in upland and hilly zones.
Commuters in Metro Manila should anticipate disruptions to traffic and public transportation, particularly during periods of heavier downpours. Flooding in streets and underpasses is possible, especially in areas historically prone to inundation.
Northern and Eastern Luzon
A broader belt of Luzon faces more unsettled conditions today. Cagayan Valley and the Cordillera Administrative Region (CAR) — home to provinces such as Isabela, Cagayan, Kalinga, Apayao, Abra, Benguet, Ifugao, and Mountain Province — will experience cloudy skies with scattered rains and thunderstorms. The same forecast applies to the rest of the Ilocos Region, the remaining provinces of Central Luzon, the rest of CALABARZON, and the rest of MIMAROPA.
PAGASA cautions that rainfall in these areas can reach moderate to at times heavy intensities, with thunderstorms making flash floods and landslides a serious concern. Mountain communities in the Cordillera and riverine areas along Cagayan Valley are particularly vulnerable and should maintain close coordination with local disaster risk reduction and management offices (LDRRMOs).
Visayas Forecast
The Visayas — encompassing Western, Central, and Eastern Visayas — will see partly cloudy to cloudy skies with isolated rainshowers or thunderstorms today. These weather disturbances are attributed to localized thunderstorm activity rather than the monsoon directly, though their effects can still be significant.
PAGASA notes that flash floods and landslides remain a hazard in the Visayas during severe thunderstorm episodes. Provinces with known flood-prone areas and coastal communities should remain on alert. Coastal waters across the Visayas are forecast to be slight to moderate, with wave heights of 0.6 to 1.8 meters, and winds blowing from the southeast to south at light to moderate speeds.
Mindanao Forecast
Mindanao will also experience partly cloudy to cloudy skies with isolated rainshowers or thunderstorms today, driven by localized thunderstorms. As in the Visayas, the risk of flash floods and landslides is present during severe thunderstorm activity, and residents in vulnerable areas are advised to stay informed.
Wind conditions over Mindanao are forecast to be light to moderate with variable direction, and coastal waters are expected to remain slight to moderate, with wave heights of 0.6 to 1.2 meters — generally the calmest marine conditions in the country today.
Wind and Coastal Water Conditions
The roughest seas today are off Northern Luzon, Central Luzon, and the western section of Southern Luzon, where PAGASA forecasts moderate to strong winds blowing from the southwest and coastal waters ranging from moderate to rough, with wave heights of 1.2 to 2.8 meters. Mariners, fishermen, and operators of small sea vessels in these waters are strongly advised to exercise extreme caution or delay travel until conditions improve.
Over the Visayas and the rest of Luzon, winds will be light to moderate from the southeast to south, with wave heights of 0.6 to 1.8 meters — classified as slight to moderate. Mindanao's coastal waters are the calmest today, with slight to moderate wave heights of 0.6 to 1.2 meters under light to moderate variable winds.
Temperature and Humidity
Based on observations recorded at the PAGASA Weather Station in Science Garden, Diliman, Quezon City, the temperature for the 24-hour period ending at 8:00 PM yesterday reached a maximum of 31.0°C at 1:00 PM and dipped to a minimum of 25.0°C at 6:00 AM. Relative humidity ranged from a high of 95% to a low of 63%, reflecting the moisture-heavy atmosphere typical of the southwest monsoon season.
The high humidity combined with intermittent rain may make conditions feel warmer and more oppressive during breaks in cloud cover, particularly in Metro Manila and other urban areas.
Astronomical Information for Metro Manila
For those planning outdoor activities around daylight hours, PAGASA notes that the sun rises today at 5:26 AM and sets at 6:23 PM. The moon rises at 8:56 PM and sets at 7:29 AM, with an illumination level of 91% — nearly a full moon.
Safety Reminders
PAGASA's forecast underscores the need for heightened awareness, particularly in communities prone to flooding and landslides. Residents are encouraged to take the following precautions:
- Avoid crossing flooded roads, bridges, or rivers, even when water levels appear low.
- Residents near slopes, ravines, or riverbanks should be ready to evacuate if local authorities issue advisories.
- Fishermen and seafarers should heed PAGASA's coastal water warnings before heading out, especially along the western seaboard of Luzon.
- Keep emergency kits accessible and maintain communication with family members and neighbors.
- Follow updates from local government units and barangay officials, who will relay advisories based on ground conditions.
"Track the sky… helping the country." — PAGASA Weather and Flood Forecasting Center
Monitor official PAGASA updates at pagasa.dost.gov.ph.