September 4, 2025 | Mindanao — The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) issued its 5:00 a.m. regional weather forecast for Mindanao, cautioning residents of possible flash floods and landslides as localized thunderstorms are expected throughout the island from Thursday morning until early Friday.
According to PAGASA’s Mindanao Regional Services Division (MINPRSD), most provinces will experience partly cloudy to cloudy skies with isolated rain showers or thunderstorms. These weather conditions are brought by localized thunderstorms, a common occurrence during the southwest monsoon season.
The agency stressed that severe thunderstorms may bring sudden heavy downpours, heightening risks of flooding in low-lying areas and landslides in mountainous terrain.
Winds and Sea Conditions
Across the island, winds will be light to moderate from the south to southwest, while coastal waters are forecast to remain slight to moderate, with wave heights ranging from 0.6 to 1.5 meters. Despite this, PAGASA advised fisherfolk and small seacraft operators to stay alert for sudden changes in weather conditions, particularly during thunderstorm activity.
Regional Outlook
- Zamboanga Peninsula (Zamboanga City, Zamboanga del Norte, Zamboanga del Sur, Zamboanga Sibugay, and Isabela City): Partly cloudy to at times cloudy skies with isolated rain showers or thunderstorms are expected. Temperatures may reach up to 33°C in inland provinces.
- Northern Mindanao (Bukidnon, Camiguin, Lanao del Norte, Misamis Occidental, and Misamis Oriental): Similar weather conditions are forecast, with Bukidnon’s upland areas expected to experience cooler temperatures, dipping to 19°C.
- Davao Region (Metro Davao, Davao del Norte, Davao del Sur, Davao Oriental, Davao de Oro, and Davao Occidental): Mostly partly cloudy skies with localized thunderstorms. Daytime highs may reach 32°C in lowland areas.
- SOCCSKSARGEN (North Cotabato, South Cotabato, Sultan Kudarat, and Sarangani): Residents should also brace for occasional thunderstorms, with coastal temperatures ranging between 24°C and 32°C.
- Caraga (Agusan del Norte, Agusan del Sur, Surigao del Norte, Surigao del Sur, and Dinagat Islands): Warm daytime weather, reaching 34°C in Agusan del Norte, may give way to thunderstorms by afternoon or evening.
- Bangsamoro Autonomous Region in Muslim Mindanao (BARMM — Cotabato City, Basilan, Lanao del Sur, Maguindanao del Norte, Maguindanao del Sur, Sulu, and Tawi-Tawi): Localized thunderstorms remain the main weather feature, with inland provinces like Maguindanao del Sur seeing highs of 33°C.
Public Advisory
PAGASA forecaster JPF reiterated the need for communities to remain vigilant:
- Avoid crossing swollen rivers or streams during heavy rains.
- Communities in flood- and landslide-prone areas should monitor advisories from their respective local disaster risk reduction and management councils.
- Fisherfolk and boat operators are advised to take precautionary measures against sudden thunderstorms while at sea.
The weather forecast is valid until 5:00 a.m. of September 5, 2025. For more updates, residents may log on to bagong.pagasa.dost.gov.ph or call PAGASA at (632) 8922-1992 and 8927-1335.