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Weather & Climate in Port Heiden, AK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Port Heiden has a cool climate with an average annual temperature of 40°F (4°C). Winters average 31°F in January while summers reach 51°F in July. The area gets 233 sunny days per year, above the national average. Annual precipitation totals 48.9 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 21 / among the cleanest air in the country. The city sits at an elevation of 65 feet.
Temperature
31°F Jan (-1°C)
51°F Jul (11°C)
| Annual Average | 40.0°F |
| 26% below US avg | |
| January Average | 31°F (-1°C) |
| July Average | 51°F (11°C) |
| Sunny Days | 233 days/yr |
Geography
| Elevation | 65 ft (20 m) |
| Area | 51.0 sq mi (132.1 km²) |
| Population Density | 2/sq mi |
| Coordinates | 56.9652°N, 158.5864°W |
| Timezone | America/Anchorage |
| County | Lake and Peninsula Borough County |
| Nearest Airport | Ted Stevens Anchorage International (ANC) 421 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 21.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 6.3 / 100 |
| Social Vulnerability | 96.7 / 100 |
| Community Resilience | 11.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | No Rating |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Coastal Flood | No Rating |
| Tsunami | Relatively Low |
| Volcano | Relatively Low |
| Avalanche | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,571 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.8.
| May 29, 2015 | 117 km SSE of Ugashik, Alaska | M6.8 | 138 km | 73 km |
| Apr 2, 2016 | 42 km E of Port Heiden, Alaska | M6.2 | 40 km | 11 km |
| Dec 22, 2000 | 33 km NE of Chignik, Alaska | M5.5 | 56 km | 92 km |
| May 9, 1998 | 35 km SE of Egegik, Alaska | M5.4 | 149 km | -3 km |
| Apr 28, 2022 | 119 km E of Chignik, Alaska | M5.4 | 146 km | 52 km |
| May 9, 1998 | 48 km SE of Egegik, Alaska | M5.4 | 148 km | -3 km |
| Jan 27, 2004 | 113 km SSE of Ugashik, Alaska | M5.4 | 133 km | 44 km |
| Jun 13, 2015 | 121 km E of Chignik, Alaska | M5.2 | 138 km | 77 km |
| Aug 27, 2016 | 59 km ESE of Perryville, Alaska | M5.1 | 141 km | 13 km |
| Jan 7, 2006 | 85 km ESE of Chignik, Alaska | M5.1 | 135 km | 47 km |
| Sep 5, 1994 | 34 km S of Chignik, Alaska | M5.1 | 109 km | 62 km |
| Apr 5, 2013 | 96 km SE of Ugashik, Alaska | M5.0 | 143 km | 72 km |
| Mar 18, 2008 | 103 km E of Chignik, Alaska | M4.9 | 125 km | 36 km |
| May 22, 1992 | Alaska Peninsula | M4.9 | 75 km | 48 km |
| May 30, 2015 | 121 km E of Chignik, Alaska | M4.9 | 141 km | 75 km |
| Jul 2, 2004 | 112 km E of Chignik, Alaska | M4.9 | 143 km | 38 km |
| Mar 24, 2017 | 34 km S of Ugashik, Alaska | M4.8 | 72 km | 7 km |
| Mar 12, 2007 | 63 km E of Chignik, Alaska | M4.8 | 101 km | 46 km |
| Apr 20, 2001 | 60 km SE of Chignik, Alaska | M4.8 | 126 km | 36 km |
| Aug 3, 2012 | 44 km SSW of Ugashik, Alaska | M4.8 | 59 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Aniakchak (27 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Aniakchak | Caldera | 1,341 m (4,400 ft) | 1931 | 27 km |
| Chiginagak | Stratovolcano | 2,221 m (7,287 ft) | 1998 | 98 km |
| Ukinrek Maars | Maar(s) | 91 m (299 ft) | 1977 | 157 km |
| Ugashik-Peulik | Stratovolcano | 1,474 m (4,836 ft) | 1814 | 159 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
4 wildfires (100+ acres) recorded within 100 km. Largest: PILOT POINT (4,482 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | PILOT POINT | 4,482 | 95 km |
| 2021 | PILOT POINT | 3,733 | 94 km |
| 2019 | OFFAL BEACH | 2,890 | 19 km |
| 2006 | MESHIK RIVER | 1,520 | 47 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 1.0 in | |
| February | 24°F (-4°C) | 0.8 in | Coldest, Driest |
| March | 27°F (-3°C) | 1.1 in | |
| April | 33°F (1°C) | 1.0 in | |
| May | 41°F (5°C) | 1.1 in | |
| June | 48°F (9°C) | 1.2 in | |
| July | 51°F (11°C) | 1.9 in | |
| August | 53°F (12°C) | 2.3 in | Warmest |
| September | 48°F (9°C) | 2.6 in | Wettest |
| October | 38°F (3°C) | 2.5 in | |
| November | 31°F (-1°C) | 1.7 in | |
| December | 27°F (-3°C) | 1.6 in |
Port Heiden has a seasonal temperature swing of 29°F / from 24°F in February to 53°F in August. Total annual precipitation is 18.8 inches, with September being the wettest month (2.6") and February the driest (0.8").