QUEZON CITY, June 15, 2026 — Rainshowers and thunderstorms are forecast to affect communities across the entire Philippines on Monday, as the country's state weather bureau PAGASA reported that easterlies are driving unsettled weather over eastern Visayas and Mindanao, while localized thunderstorm activity brings wet conditions to Metro Manila and the rest of the country.
The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) issued its 24-hour public weather forecast at 4:00 AM on June 15, 2026, valid through 4:00 AM on June 16. The bulletin covers the entire Philippine archipelago and urges residents in all regions to remain alert to the possibility of flash floods and landslides during periods of severe thunderstorms.
National Weather Picture: Scattered Storms From North to South
The dominant feature shaping Monday's weather is a combination of easterlies — prevailing winds originating from the east — affecting the eastern sections of Visayas and Mindanao, alongside localized thunderstorm development that will bring rain to Metro Manila and the broader Luzon area. No tropical cyclone is influencing the country's weather at the time of this forecast.
PAGASA describes the general outlook as "partly cloudy to cloudy skies with isolated rainshowers or thunderstorms" for virtually the entire country. While this characterization may sound routine for the Philippine wet season, the weather bureau specifically flags the hazard of flash floods and landslides should any of these thunderstorms become severe — a reminder that even isolated storms can produce dangerous rainfall intensities in a short period of time.
Luzon: Metro Manila and Surrounding Areas
Residents of Metro Manila and the rest of Luzon can expect partly cloudy to cloudy skies on Monday, with isolated rainshowers or thunderstorms developing through the day. PAGASA attributes these conditions to localized thunderstorms — weather systems that build up due to daytime heating and atmospheric instability rather than a large-scale weather disturbance.
In practical terms, this means that while the morning may start with manageable cloud cover, afternoon and evening hours are the most likely window for brief but potentially heavy downpours. Commuters in Metro Manila and motorists traversing mountain roads in Luzon provinces should be prepared for sudden changes in visibility and road conditions.
Winds across Luzon will blow from the southeast to southwest at light to moderate intensity. Coastal waters adjacent to Luzon are forecast to experience slight to moderate wave heights of 0.6 to 1.8 meters, conditions that small vessel operators should factor into their travel plans.
Visayas: Easterlies Bringing Rain to Eastern Provinces
The Visayas region is split between two weather influences on Monday. The eastern portions of the region — specifically Eastern Visayas — are under the more direct influence of the easterlies, which PAGASA identifies as the primary driver of partly cloudy to cloudy skies with isolated rainshowers or thunderstorms in that area.
The rest of the Visayas, including the Western and Central Visayas regions, falls under the same general nationwide pattern of localized thunderstorm activity. Residents from Samar and Leyte in the east to Iloilo, Cebu, and Negros in the central and western sections of the Visayas should all anticipate a wet Monday with the risk of flash floods or landslides during any severe storm episode.
Winds over the Visayas will mirror Luzon's conditions, blowing from the southeast to southwest at light to moderate speeds. Wave heights in Visayas coastal waters are forecast at 0.6 to 1.8 meters, rated as slight to moderate.
Mindanao: Eastern Provinces Under Easterly Influence
Mindanao sees some of the most specifically identified areas in Monday's forecast. PAGASA singles out Dinagat Islands, Surigao del Norte, Surigao del Sur, and Davao Oriental as areas where the easterlies are the direct cause of partly cloudy to cloudy skies with isolated rainshowers or thunderstorms.
These provinces along Mindanao's northeastern and eastern seaboard face the Pacific Ocean directly, making them the first landmasses to receive easterly-driven weather systems. Residents and local government units in these areas — many of which include communities situated along river systems and on hillside terrain — should maintain heightened awareness of flash flood and landslide risks throughout the day.
The rest of Mindanao, including major urban centers such as Davao City, Cagayan de Oro, General Santos, and Zamboanga City, will experience the same pattern of partly cloudy to cloudy skies with isolated rainshowers or thunderstorms attributed to localized thunderstorm development.
Winds across Mindanao will come from the south to southeast, also at light to moderate intensity — a slightly different wind direction compared to Luzon and Visayas, reflecting the island group's more southerly position and proximity to the equatorial wind belt. Coastal waters around Mindanao are forecast to be slight to moderate, with wave heights between 0.6 and 1.2 meters — a somewhat calmer sea state than those forecast for Luzon and Visayas waters.
Temperature and Humidity: A Warm and Humid Monday
PAGASA's weather station at Science Garden in Diliman, Quezon City recorded temperature and humidity data for the 24-hour period ending at 8:00 PM on Sunday, June 14, providing context for Monday's expected conditions.
The maximum temperature recorded was 32.6°C, logged at 5:00 PM, while the minimum temperature dipped to 24.5°C at 2:00 AM. Relative humidity ranged from a high of 96% at 5:00 AM to a low of 60% at 2:00 PM — a range that underscores the oppressively humid conditions typical of the Philippine wet season in June.
The combination of high daytime temperatures and elevated humidity creates the atmospheric instability that fuels localized thunderstorm development, particularly during the afternoon hours. Residents should expect the "feels like" temperature during peak afternoon hours to be significantly higher than the thermometer reading alone would suggest.
Astronomical Information for Monday, June 15
For Metro Manila, PAGASA reports sunrise at 5:27 AM and sunset at 6:26 PM, providing approximately 13 hours of daylight. The moon rises at 5:09 AM and sets at 6:48 PM, with a lunar illumination of 0% — indicating a new moon phase on Monday. Tidal data from NAMRIA notes a high tide of 1.47 meters at 9:07 AM and a low tide of -0.29 meters at 5:58 PM for Manila Bay.
Safety Advice: What Filipinos Should Do Today
PAGASA's bulletin explicitly identifies flash floods and landslides as possible impacts during severe thunderstorms — a hazard applicable to the entire country, not just the areas under direct easterly influence. Here is what residents across all regions should keep in mind:
Inland and upland communities: Avoid or delay travel through mountain passes, narrow ravines, and riverbanks when dark clouds and thunder are present. Landslides can occur rapidly during intense, short-duration rainfall typical of thunderstorm events.
Low-lying and flood-prone urban areas: Metro Manila's urban flooding can develop quickly during intense downpours. Residents in known flood-prone barangays should monitor local drainage conditions and be prepared to move to higher ground if water levels rise rapidly.
Coastal and maritime communities: Small vessel operators and fisherfolk across the country should observe the forecast wave heights — up to 1.8 meters in Luzon and Visayas waters — and exercise appropriate caution, particularly if venturing into open coastal areas.
General public: Keep an umbrella or rain gear accessible throughout the day. Afternoon thunderstorms can develop rapidly and produce heavy, localized rainfall even if the morning appears dry or only lightly overcast.
"Possible flash floods or landslides during severe thunderstorms" — PAGASA, 24-Hour Public Weather Forecast, 4:00 AM, June 15, 2026
Stay Informed
Weather conditions can change rapidly, especially during the wet season when localized thunderstorms can intensify without much warning. PAGASA issues updated forecasts throughout the day, including special weather advisories when conditions warrant elevated alerts.
Monitor official PAGASA updates at pagasa.dost.gov.ph