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.
Tonight
39°F
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 39. Northeast wind 10 to 15 mph. Chance of precipitation is 50%.
7-day forecast for Port Alsworth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 39°F | Chance Light Rain | 10 to 15 mph NE | 45% |
| Wednesday | 45°F | Light Rain Likely then Rain Showers Likely | 10 mph NE | 69% |
| Wednesday Night | 30°F | Chance Rain Showers then Chance Light Rain | 5 to 10 mph E | 49% |
| Thursday | 42°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 | 5 mph NW | 15% |
| Friday Night | 23°F | Mostly Cloudy then Slight Chance Light Snow | 0 to 5 mph N | 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% |
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.