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Weather & Climate in San Sebastian, Philippines
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Sebastian has a warm climate with an average annual temperature of 77°F (25°C). Winters average 74°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 124 sunny days per year, below the national average of 205. Annual precipitation totals 129.1 inches (wetter than the 38-inch national average). The city sits at an elevation of 10 feet.
Temperature
74°F Jan (23°C)
80°F Jul (27°C)
| Annual Average | 77.4°F |
| 43% above US avg | |
| January Average | 74°F (23°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 124 days/yr |
Geography
| Elevation | 10 ft (3 m) |
| Area | 5,287.3 sq mi (13,694.0 km²) |
| Population Density | 0/sq mi |
| Coordinates | 11.7100°N, 125.0181°W |
| Timezone | Asia/Manila |
Precipitation & Snow
Air Quality
Earthquake History
1,468 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.2.
| Apr 21, 1995 | 10 km E of Dapdap, Philippines | M7.2 | 72 km | 21 km |
| Jun 11, 1996 | 8 km NNE of Palapag, Philippines | M7.1 | 102 km | 33 km |
| May 5, 1995 | 14 km NE of Cabatuan, Philippines | M7.1 | 106 km | 16 km |
| Apr 21, 1995 | 19 km E of Dolores, Philippines | M6.9 | 77 km | 20 km |
| Apr 23, 1995 | 10 km E of Gamay, Philippines | M6.8 | 86 km | 24 km |
| Apr 21, 1995 | 14 km ESE of Can-Avid, Philippines | M6.8 | 64 km | 17 km |
| Apr 21, 1995 | 47 km E of Dapdap, Philippines | M6.8 | 105 km | 27 km |
| Jul 6, 2017 | 2 km S of Lim-oo, Philippines | M6.5 | 78 km | 9 km |
| May 8, 1995 | 40 km ENE of Hernani, Philippines | M6.4 | 106 km | 12 km |
| Apr 23, 2019 | 17 km ESE of Tutubigan, Philippines | M6.4 | 21 km | 56 km |
| Oct 2, 1996 | 3 km ENE of San Julian, Philippines | M6.4 | 51 km | 33 km |
| Feb 15, 2003 | 11 km SSW of San Vicente, Philippines | M6.3 | 114 km | 10 km |
| Apr 29, 1995 | 57 km E of Sulat, Philippines | M6.1 | 106 km | 15 km |
| Feb 15, 2023 | 9 km NNE of Miaga, Philippines | M6.1 | 143 km | 8 km |
| May 5, 1995 | 12 km N of Cabatuan, Philippines | M6.1 | 106 km | 33 km |
| Jun 14, 1996 | 16 km N of Cabodiongan, Philippines | M6.1 | 123 km | 29 km |
| Jul 1, 2003 | 22 km NW of Cabodiongan, Philippines | M6.0 | 122 km | 33 km |
| Jun 26, 2003 | 4 km ENE of Miaga, Philippines | M6.0 | 141 km | 10 km |
| Apr 21, 1995 | 23 km ESE of Dolores, Philippines | M6.0 | 79 km | 28 km |
| Jul 5, 1994 | 11 km NE of Hinundayan, Philippines | M5.9 | 146 km | 29 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
60 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Fung-wong | Category 3 | — | 244 km |
| 2025 | Kalmaegi | Category 2 | — | 95 km |
| 2024 | Man-yi | Category 5 | 121 mph | 177 km |
| 2021 | Rai | Category 5 | 121 mph | 190 km |
| 2021 | Surigae | Category 5 | 138 mph | 280 km |
| 2020 | Goni | Category 5 | 138 mph | 221 km |
| 2020 | Vongfong | Category 3 | 98 mph | 56 km |
| 2020 | Molave | Category 1 | 81 mph | 189 km |
| 2019 | Kammuri | Category 4 | 104 mph | 134 km |
| 2019 | Phanfone | Category 3 | 92 mph | 37 km |
| 2016 | Nock-ten | Category 5 | 121 mph | 199 km |
| 2016 | Sarika | Category 1 | 75 mph | 252 km |
| 2015 | Melor | Category 4 | 109 mph | 101 km |
| 2015 | Mekkhala | Category 1 | 69 mph | 88 km |
| 2014 | Hagupit | Category 4 | 109 mph | 21 km |
| 2014 | Rammasun | Category 4 | 98 mph | 122 km |
| 2013 | Haiyan | Category 5 | 144 mph | 82 km |
| 2010 | Conson | Category 1 | 75 mph | 288 km |
| 2008 | Fengshen | Category 3 | 104 mph | 27 km |
| 2006 | Durian | Category 4 | 121 mph | 188 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
7 tsunamis recorded within 500 km. Highest wave on record: 12.0 m (39 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2022 | ABUYOG, LEYTE | Meteorological | 12.0 m | 170 | 111 km |
| 1975 | PHILIPPINE TRENCH | Earthquake | 3.0 m | 1 | 141 km |
| 1995 | SAMAR ISLAND | Earthquake | 2.0 m | — | 72 km |
| 2003 | SAMAR SEA | Eruption + Earthquake | 1.0 m | — | 114 km |
| 1995 | SAMAR ISLAND | Earthquake | 0.1 m | — | 105 km |
| 1925 | PHILIPPINE SEA | Earthquake | — | — | 144 km |
| 1897 | SAMAR ISLAND | Earthquake | — | — | 112 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Biliran (57 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Biliran | Compound | 1,301 m (4,268 ft) | 1939 | 57 km |
| Mahagnao | Stratovolcano | 860 m (2,822 ft) | Unknown | 93 km |
| Bulusan | Stratovolcano(es) | 1,535 m (5,036 ft) | 2017 | 158 km |
| Cabalían | Stratovolcano | 912 m (2,992 ft) | 1820 | 160 km |
| Pocdol Mountains | Compound | 1,102 m (3,615 ft) | Unknown | 188 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 74°F (23°C) | 14.9 in | Coldest |
| February | 74°F (23°C) | 10.5 in | |
| March | 76°F (24°C) | 7.7 in | |
| April | 78°F (25°C) | 7.0 in | Driest |
| May | 79°F (26°C) | 7.9 in | |
| June | 80°F (26°C) | 8.6 in | |
| July | 80°F (27°C) | 9.5 in | |
| August | 80°F (27°C) | 7.1 in | Warmest |
| September | 79°F (26°C) | 9.0 in | |
| October | 78°F (26°C) | 11.7 in | |
| November | 77°F (25°C) | 17.3 in | |
| December | 75°F (24°C) | 17.9 in | Wettest |
San Sebastian has a seasonal temperature swing of 7°F / from 74°F in January to 80°F in August. Total annual precipitation is 129.1 inches, with December being the wettest month (17.9") and April the driest (7.0").