Port Alsworth, AK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Alsworth, a community in Lake And Peninsula Borough County, Alaska.
Today
45°F
Light Rain Likely then Rain Showers Likely
Rain likely before 9am, then rain showers likely. Mostly cloudy. High near 45, with temperatures falling to around 38 in the afternoon. Northeast wind around 10 mph. Chance of precipitation is 70%.
7-day forecast for Port Alsworth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 45°F | Light Rain Likely then Rain Showers Likely | 10 mph NE | 69% |
| Tonight | 30°F | Chance Rain Showers then Chance Light Rain | 5 to 10 mph E | 49% |
| Thursday | 40°F | Slight Chance Light Rain then Mostly Cloudy | 5 mph NE | 22% |
| Thursday Night | 25°F | Mostly Cloudy | 5 mph N | 11% |
| Friday | 36°F | Mostly Cloudy then Slight Chance Light Snow | 5 mph NW | 17% |
| Friday Night | 23°F | Slight Chance Light Snow | 0 to 5 mph NW | 20% |
| Saturday | 34°F | Slight Chance Light Snow then Mostly Cloudy | 0 mph | 20% |
| Saturday Night | 19°F | Slight Chance Light Snow | 0 mph | 19% |
| Sunday | 33°F | Chance Light Snow | 0 mph | 35% |
| Sunday Night | 20°F | Chance Light Snow | 0 to 5 mph NE | 35% |
| Monday | 36°F | Mostly Cloudy | 0 to 5 mph NE | 11% |
| Monday Night | 22°F | Mostly Cloudy then Chance Light Snow | 0 mph | 51% |
| Tuesday | 35°F | Chance Light Snow | 0 mph | 52% |
| Tuesday Night | 18°F | Mostly Cloudy then Slight Chance Light Snow | 0 mph | 16% |
Forecast source: National Weather Service (api.weather.gov) for Port Alsworth (60.157, -154.340). Updated through the day.
Growing snapshot for Port Alsworth
Last spring frost
Jun 2
First fall frost
Sep 12
Growing season
101 days
More local growing data for Port Alsworth: nearby ZIP 99653 weather · frost dates · planting calendar · Alaska frost dates
Nearby towns & communities
Chignik
Chignik Lagoon
Chignik Lake
Egegik
Igiugig
Iliamna
Ivanof Bay
Kokhanok
Levelock
Newhalen
Nondalton
Pedro Bay
Perryville
Pilot Point
Pope-Vannoy Landing
Port Heiden
Ugashik
Climate data from the nearest NOAA station, Port Alsworth 1 Sw, Ak (2.7 mi from Port Alsworth). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.