MANILA, August 29, 2026 — Parts of the Philippines woke up Friday morning under the combined influence of a Low Pressure Area and the southwest monsoon, with PAGASA warning that heavy to intense rainfall could trigger flooding and landslides in several provinces across Luzon before the day is through. The rest of the country, meanwhile, faces a mixed bag of cloudy skies, scattered showers, and isolated thunderstorms driven by the same monsoon system sweeping across the archipelago.
In its 4:00 AM advisory valid until 4:00 AM Saturday, August 30, 2026, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) painted a nationwide picture that demands attention — particularly for residents in northern and central Luzon, where rain-related hazards are most acute today.
What Is Driving Today's Weather
Two weather systems are working in tandem to shape Friday's forecast across the Philippines.
The first is a Low Pressure Area (LPA), estimated at 3:00 AM today to be located approximately 520 kilometers north-northeast of Itbayat, Batanes, at coordinates 24.8°N, 124.4°E. An LPA is a region where atmospheric pressure is lower than the surrounding air, causing winds to spiral inward and converge — drawing in moisture and producing clouds and rain. While this LPA has not intensified into a tropical cyclone, its proximity is enough to enhance rainfall across northern and northeastern Luzon.
The second system is the southwest monsoon, locally known as habagat. This is the seasonal wind flow that arrives each year between June and September, carrying warm, moisture-laden air from the southwest across the country. When the habagat is active and interacting with other systems such as an LPA, it can dramatically amplify rainfall — particularly on the western side of Luzon and the Visayas. That is precisely the scenario playing out today, according to PAGASA.
Region-by-Region Forecast
Northern and Central Luzon: Highest Alert
The most severe weather today is expected across a stretch of northern and central Luzon provinces. PAGASA forecasts heavy to intense rainfall — the kind that can overwhelm drainage systems and saturate hillsides — for the following areas:
The southwest monsoon is expected to dump heavy rain on Ilocos Sur, La Union, Pangasinan, Benguet, Bontoc, Tarlac, and Nueva Vizcaya, with flooding and landslides listed as possible impacts. The Ilocos and Cordillera regions are particularly susceptible to landslides given their mountainous terrain, and residents in low-lying communities near rivers should remain on alert.
A second cluster of provinces faces similar conditions: Ilocos Norte, Abra, Nueva Ecija, Bulacan, Pampanga, and nearby areas are also under the influence of the southwest monsoon with heavy rain and the risk of localized flooding and landslides.
Rest of Luzon, Western Visayas, and Negros Island: Cloudy With Thunderstorms
Beyond the most heavily affected provinces, the remainder of Luzon, along with western Visayas and the Negros Island Region, can expect cloudy skies with scattered rain showers and thunderstorms, also caused by the southwest monsoon. These areas face a moderate but real risk of flooding due to the persistence of monsoon rains, which can be moderate to heavy at times. Residents should not be complacent simply because their area is not in the highest-risk category.
Mindanao and the Rest of the Country: Isolated Showers
For Mindanao and the remaining parts of the country not covered above, PAGASA forecasts partly cloudy to cloudy skies with isolated rain showers or thunderstorms. These are driven by local thunderstorm activity rather than the monsoon directly. While the risk is lower, afternoon thunderstorms remain possible — particularly inland and in higher elevations — and residents should remain weather-aware through the afternoon hours.
Wind and Coastal Water Conditions
The wind and sea state picture on Friday adds another dimension of concern, especially for those living along coastlines or whose livelihoods depend on the sea.
Across Luzon, winds are forecast to be moderate to strong from the southwest, with coastal waters described as moderate to rough. This is hazardous for small boats and fishing vessels. In Visayas, winds are light to moderate from the southwest, and coastal waters will be slight to moderate — more manageable but still requiring caution. The rest of the country, including Mindanao, will see light to moderate winds and slight to moderate coastal waters.
Decoding the Warnings: What Each Condition Actually Means
PAGASA's forecast for Friday includes the threat of heavy to intense rainfall and rough coastal waters over Luzon. If you are unsure what these classifications mean in practice, it helps to understand the system behind the warnings. For a full explanation of the color-coded rainfall warnings and sea condition advisories that PAGASA uses, see our guide on how to read PAGASA's weather warnings.
In plain terms for today:
- Heavy to intense rainfall means rain is falling fast enough — potentially 15 to 30 millimeters per hour or more — that rivers can rise rapidly and slopes can become unstable. If you live near a river, creek, or hillside in the affected provinces, you should be ready to move to higher ground quickly if water begins to rise.
- Moderate to rough coastal waters in Luzon means wave heights are significant enough to capsize or swamp small and medium-sized vessels. This is not conditions to take lightly.
- Scattered thunderstorms across the rest of Luzon and Visayas mean lightning strikes are a real risk for anyone outdoors. Seek shelter indoors — not under trees — when thunder is heard.
"The southwest monsoon [is] affecting Luzon and Visayas," PAGASA stated in its 4:00 AM advisory on August 29, 2026, with a Low Pressure Area estimated 520 kilometers north-northeast of Itbayat adding to the moisture feed over northern Luzon.
What It Means for You
Commuters
If you are commuting through northern or central Luzon today — particularly in the Ilocos Region, Cordillera, Central Luzon, and Cagayan Valley — expect rain throughout the day and be prepared for possible road closures due to flooding or landslides. Give yourself extra travel time, avoid underpasses and low-lying roads during heavy rainfall, and check for local advisories before heading out. Even in Metro Manila, where conditions are in the "rest of Luzon" category, expect wet roads and slower traffic during rain bursts.
Fisherfolk and Small-Boat Operators
PAGASA's forecast of moderate to rough seas off Luzon is a serious warning. Small fishing boats and bancas should not go out to sea today along Luzon's western and northern coasts. Conditions in the Visayas are more moderate but still require caution. Wait for updated advisories before heading out, and consult your local coast guard station if in doubt.
Farmers
For farmers in the Ilocos Region, Pangasinan, Benguet, and other mountainous provinces, the risk of intense rainfall today means potential flash flooding in low-lying fields and the possibility of landslides affecting farm access roads. Secure equipment and livestock where possible, and avoid working in open fields during thunderstorms.
Students and Parents
Parents sending children to school in the hardest-hit provinces of northern and central Luzon should monitor local government announcements about class suspensions, which local chief executives may issue as conditions develop. Even in areas with lighter rain, afternoon thunderstorm activity is possible, so plan pick-up arrangements accordingly and have rain gear ready.
Outdoor Workers and Construction Personnel
Work in elevated, open, or flood-prone areas in Luzon carries heightened risk today. Construction sites near slopes or unstable ground should heighten safety protocols. Employers are encouraged to monitor conditions and allow workers in high-risk areas to seek shelter when rain intensifies.
Temperature and Humidity Outlook
PAGASA's weather station at Science Garden in Diliman, Quezon City recorded the following extremes for the 24-hour period ending at 8:00 PM on Thursday, August 28, 2026:
- Maximum temperature: 28.7°C, recorded at 2:00 PM
- Minimum temperature: 25.4°C, recorded at 5:00 AM (approximate, based on available data)
- Maximum relative humidity: 89%, recorded at 5:00 AM
- Minimum relative humidity: recorded at 5:00 PM (exact figure partially unclear in source)
The relatively high maximum humidity reading of 89% reflects the moisture-heavy environment brought by the southwest monsoon. Even in areas with lighter rain today, the air will feel heavy and humid — conditions that can increase heat stress for outdoor workers and those without air conditioning, despite temperatures remaining in a moderate range.
Tides and Astronomical Information for Metro Manila
For Metro Manila, PAGASA and NAMRIA (National Mapping and Resource Information Authority) provide the following tide information for Friday, August 29, 2026:
- Low tide: Early morning (exact time partially reflected in source data)
- High tide: 10:57 AM at 4.21 meters; and a second high tide at 11:54 PM at 0.82 meters (Manila Bay)
The high tide in the late morning, combined with expected rainfall, could contribute to coastal flooding in low-lying areas of Metro Manila and nearby coastal towns. Residents in flood-prone barangays near Manila Bay are advised to stay alert as the morning progresses.
Bottom Line
If you are in northern or central Luzon today — particularly in the Ilocos Region, Cordillera, and Central Luzon provinces — the single most important thing you can do is stay away from riverbanks, creeks, and hillsides, and be ready to evacuate to higher ground if floodwaters begin to rise. The combination of the southwest monsoon and the nearby Low Pressure Area is funneling significant rainfall into these areas, and conditions can change quickly. Everyone else across the Philippines should remain weather-aware, avoid the sea in Luzon, and prepare for afternoon showers and thunderstorms.
Monitor official PAGASA updates at pagasa.dost.gov.ph.