Most parts of the Philippines are bracing for a wet and stormy Sunday as the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) forecasts widespread thunderstorm activity on June 14, 2026. The state weather bureau released its 24-hour public weather forecast at 4:00 AM Sunday, covering conditions through 4:00 AM on Monday, June 15. While rain will be scattered throughout the archipelago, the harshest conditions are anticipated over the western sections of Mindanao.
Easterlies Driving Rain Across Mindanao and Eastern Regions
According to PAGASA, easterlies — a seasonal wind pattern originating from the Pacific Ocean — are the dominant weather driver on Sunday. This recurring seasonal pattern is pushing wet conditions across Mindanao and the eastern portions of both Southern Luzon and the Visayas. For Metro Manila and the rest of the country, localized thunderstorm development will be the main source of rainfall throughout the day.
Western Mindanao on High Alert
The Zamboanga Peninsula, Basilan, and Tawi-Tawi are expected to bear the brunt of Sunday's weather. PAGASA specifically singled out these areas as facing the most disruptive conditions, forecasting cloudy skies with scattered rains and thunderstorms driven by the easterlies currently affecting the southern Philippines.
The weather agency issued a specific caution for communities in these areas, warning that moderate to at times heavy rainfall raises the likelihood of flash floods and landslides. Residents living near riverbanks, low-lying coastlines, and elevated or mountainous terrain — particularly in Zamboanga del Norte, Zamboanga del Sur, Zamboanga Sibugay, Basilan, and the Tawi-Tawi island group — are urged to closely monitor local conditions and stay in contact with their respective local disaster risk reduction and management offices.
Elsewhere in Mindanao — covering the Davao Region, Soccsksargen, Caraga, Northern Mindanao, and the Bangsamoro Autonomous Region in Muslim Mindanao (BARMM) areas outside the Zamboanga Peninsula cluster — PAGASA projects partly cloudy to cloudy skies with isolated rainshowers or thunderstorms. Although the risk is lower than in the western portions, the agency warns that flash floods and landslides remain possible during periods of severe thunderstorm activity.
Visayas: Eastern Provinces Under Direct Easterly Influence
Eastern Visayas — composed of Leyte, Southern Leyte, Samar, Eastern Samar, Northern Samar, and Biliran — falls directly within the path of the easterlies on Sunday. PAGASA forecasts partly cloudy to cloudy skies with isolated rainshowers or thunderstorms, with flash floods and landslides remaining a concern should any individual thunderstorm reach severe intensity.
The remainder of the Visayas, including Western Visayas provinces such as Iloilo, Capiz, Aklan, Antique, and Guimaras, and Central Visayas encompassing Cebu, Bohol, Negros Oriental, and Siquijor, will also experience partly cloudy to cloudy skies with isolated showers or thunderstorms linked to localized storm development. Residents throughout the Visayas are advised to remain vigilant, as afternoon and early evening hours typically bring the most intense thunderstorm activity.
Luzon: Isolated Storms for Metro Manila and the Provinces
Metro Manila and the bulk of Luzon are projected to see partly cloudy to cloudy skies with isolated rainshowers or thunderstorms on June 14, according to PAGASA. The weather bureau attributes this activity to localized thunderstorm development rather than any large-scale weather disturbance, meaning rainfall distribution will be uneven — certain neighborhoods may receive brief but heavy downpours while adjacent areas stay dry.
The eastern sections of Southern Luzon, including Quezon province, Aurora, and Pacific-facing portions of the Bicol Region, are under direct easterly influence. The broader Bicol Region — covering Camarines Norte, Camarines Sur, Albay, Sorsogon, Catanduanes, and Masbate — can expect partly cloudy to cloudy conditions with isolated showers or thunderstorms, along with the possibility of flash floods and landslides during severe episodes.
For Northern Luzon, which takes in the Ilocos Region, Cagayan Valley, the Cordillera Administrative Region, and Central Luzon, the general forecast also calls for partly cloudy to cloudy skies with isolated thunderstorm activity. PAGASA reminds residents that even isolated afternoon storms can trigger intense, localized flooding in urban and low-lying areas — a hazard not to be taken lightly regardless of the storm's limited geographic scope.
Temperature and Humidity Readings
PAGASA's Science Garden weather station in Diliman, Quezon City logged a maximum temperature of 32.5 degrees Celsius at 11:00 AM on Saturday, June 13, and a minimum of 26.2 degrees Celsius recorded at 5:00 AM on the same date. Relative humidity fluctuated between a high of 92 percent at 5:00 AM and a low of 62 percent at 11:00 AM, consistent with the warm and muggy atmosphere characteristic of Metro Manila during the month of June.
The public should expect hot and humid intervals between rain events, with heat building through the morning hours before afternoon thunderstorms temporarily ease conditions.
Wind Conditions and Sea State
PAGASA reports that winds nationwide will be light to moderate on Sunday. Northern Luzon and the western areas of Central and Southern Luzon will experience south to southwest winds, while the rest of the country will have southwest to southeast winds — both within the light-to-moderate range.
Sea conditions are classified as slight to moderate. The state weather bureau forecasts wave heights of 0.6 to 1.8 meters off the coasts of Northern Luzon and the western shores of Central and Southern Luzon, which may still pose a hazard to small vessels. Coastal waters in other parts of the country will see wave heights ranging from 0.6 to 1.2 meters. Fisherfolk and small watercraft operators — especially those near Mindanao where thunderstorm activity is more concentrated — are advised to exercise caution before heading out to sea.
Astronomical Data and Tidal Forecast for Metro Manila
Metro Manila's sunrise on Sunday falls at 5:27 AM, with sunset at 6:26 PM, providing residents with nearly 13 hours of daylight. The moon rises at 4:05 AM and sets at 5:39 PM. At just 1 percent illumination, the moon is essentially in its new phase, meaning nighttime visibility will be minimal with little to no moonlight to rely on.
Tidal predictions for Manila Bay, as provided by PAGASA in coordination with the National Mapping and Resource Information Authority (NAMRIA), indicate a high tide of 1.35 meters at 8:23 AM and a low tide of -0.2 meters at 5:01 PM on Sunday. Individuals with planned activities along Manila Bay should factor in these tidal conditions, particularly the pronounced low tide expected during the late afternoon.
Key Safety Advisories
Flash floods and landslides represent the primary hazards associated with Sunday's weather, according to PAGASA's forecast. While the risk is most acute in Zamboanga Peninsula, Basilan, and Tawi-Tawi, the danger applies to any locality experiencing severe thunderstorm episodes throughout the country.
PAGASA urges residents in flood-prone communities and those living near slopes, hillsides, or mountain ranges to stay alert and comply immediately with any evacuation orders issued by local government authorities. Motorists are cautioned against driving through flooded roadways or underpasses. Families with children who have outdoor activities planned should monitor weather developments closely and make adjustments as needed.
For real-time updates, the public is encouraged to check official advisories on the PAGASA website at pagasa.dost.gov.ph.
Source: Breaking News Negros / breakingnewsnegros.com, originally reporting weather data from PAGASA