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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 73°F in January while summers reach 78°F in July / relatively mild seasonal variation. The area gets 311 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 128.4 inches (wetter than the 38-inch national average). The city sits at an elevation of 20 feet.
Temperature
73°F Jan (23°C)
78°F Jul (26°C)
| Annual Average | 77.2°F |
| 43% above US avg | |
| January Average | 73°F (23°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 311 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 145.9 sq mi (377.9 km²) |
| Population Density | 14/sq mi |
| Coordinates | 13.7283°N, 123.5939°W |
| Timezone | Asia/Manila |
Precipitation & Snow
Air Quality
Earthquake History
301 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.4.
| Oct 12, 1994 | 15 km E of Gigmoto, Philippines | M6.4 | 101 km | 16 km |
| Jun 9, 1994 | 18 km ENE of Rapu-Rapu, Philippines | M6.2 | 91 km | 76 km |
| May 5, 2018 | 64 km NNW of Pandan, Philippines | M6.1 | 100 km | 18 km |
| Oct 1, 2024 | 62 km NE of Gigmoto, Philippines | M5.9 | 141 km | 10 km |
| Oct 12, 1994 | 16 km E of Gigmoto, Philippines | M5.9 | 102 km | 27 km |
| Feb 22, 2005 | 17 km W of Tigbao, Philippines | M5.8 | 135 km | 18 km |
| Jul 7, 1993 | 2 km SSE of Maagnas, Philippines | M5.7 | 10 km | 40 km |
| Dec 12, 1993 | 3 km SSW of Mambulo, Philippines | M5.6 | 61 km | 22 km |
| Feb 3, 1993 | 3 km NNW of Pamplona, Philippines | M5.6 | 58 km | 18 km |
| Aug 19, 2004 | 15 km NW of Manamrag, Philippines | M5.5 | 44 km | 44 km |
| Oct 12, 1994 | 19 km ESE of Gigmoto, Philippines | M5.4 | 103 km | 21 km |
| Jul 30, 2001 | 6 km NE of Tigbao, Philippines | M5.4 | 128 km | 33 km |
| Jan 13, 2004 | 52 km ESE of Bato, Philippines | M5.4 | 130 km | 32 km |
| Jun 28, 2004 | 26 km WSW of Osmeña, Philippines | M5.4 | 131 km | 17 km |
| Feb 2, 2015 | 29 km NE of Gigmoto, Philippines | M5.4 | 110 km | 17 km |
| Aug 19, 1993 | 15 km NNE of Rapu-Rapu, Philippines | M5.3 | 76 km | 71 km |
| Feb 5, 2016 | 4 km E of San Francisco, Philippines | M5.3 | 137 km | 10 km |
| Jun 3, 2007 | 2 km E of Catabangan, Philippines | M5.3 | 99 km | 30 km |
| Apr 17, 1991 | 7 km N of Biri, Philippines | M5.3 | 137 km | 75 km |
| May 1, 2013 | 89 km NNE of Sabang Indan, Philippines | M5.3 | 136 km | 28 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
91 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Fung-wong | Category 4 | — | 87 km |
| 2024 | Man-yi | Category 5 | 121 mph | 67 km |
| 2024 | Ewiniar | Category 2 | 86 mph | 199 km |
| 2024 | Toraji | Category 1 | 81 mph | 215 km |
| 2023 | Saola | Category 4 | 109 mph | 254 km |
| 2022 | Noru | Category 5 | 109 mph | 141 km |
| 2021 | Surigae | Category 4 | 121 mph | 297 km |
| 2021 | Conson | Category 1 | — | 206 km |
| 2020 | Goni | Category 5 | 138 mph | 25 km |
| 2020 | Vongfong | Category 3 | 98 mph | 107 km |
| 2020 | Vamco | Category 3 | 86 mph | 86 km |
| 2020 | Molave | Category 1 | 81 mph | 64 km |
| 2019 | Kammuri | Category 4 | 104 mph | 71 km |
| 2019 | Phanfone | Category 3 | 92 mph | 227 km |
| 2016 | Nock-ten | Category 5 | 121 mph | 33 km |
| 2016 | Sarika | Category 4 | 109 mph | 108 km |
| 2015 | Melor | Category 4 | 109 mph | 104 km |
| 2015 | Koppu | Category 4 | 115 mph | 231 km |
| 2015 | Noul | Category 4 | 115 mph | 215 km |
| 2015 | Maysak | Category 1 | — | 271 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 1.3 m (4 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1973 | QUEZON | Earthquake | 1.3 m | 15 | 93 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Isarog (24 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Isarog | Stratovolcano | 1,966 m (6,450 ft) | -3500 | 24 km |
| Pocdol Mountains | Compound | 1,102 m (3,615 ft) | Unknown | 85 km |
| Bulusan | Stratovolcano(es) | 1,535 m (5,036 ft) | 2017 | 118 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 73°F (23°C) | 9.8 in | Coldest |
| February | 75°F (24°C) | 6.1 in | |
| March | 76°F (25°C) | 5.7 in | |
| April | 78°F (26°C) | 5.4 in | Driest |
| May | 80°F (27°C) | 7.4 in | |
| June | 80°F (27°C) | 9.6 in | Warmest |
| July | 78°F (26°C) | 11.0 in | |
| August | 80°F (27°C) | 8.1 in | |
| September | 79°F (26°C) | 10.5 in | |
| October | 78°F (26°C) | 15.4 in | |
| November | 77°F (25°C) | 18.8 in | |
| December | 76°F (24°C) | 18.9 in | Wettest |
San Sebastian has a seasonal temperature swing of 7°F / from 73°F in January to 80°F in June. Total annual precipitation is 126.7 inches, with December being the wettest month (18.9") and April the driest (5.4").