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
50°F
Rain And Snow Showers Likely
Rain and snow showers likely. Cloudy, with a high near 50. Northeast wind around 5 mph. Chance of precipitation is 60%.
7-day forecast for Port Alsworth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 50°F | Rain And Snow Showers Likely | 5 mph NE | 59% |
| Tonight | 42°F | Chance Rain Showers | 5 mph NE | 42% |
| Sunday | 45°F | Chance Rain Showers | 0 to 5 mph N | 38% |
| Sunday Night | 31°F | Chance Rain And Snow Showers | 5 mph NW | 49% |
| Monday | 44°F | Chance Light Snow then Chance Rain Showers | 5 mph NW | 49% |
| Monday Night | 32°F | Chance Rain Showers | 5 mph N | 26% |
| Tuesday | 48°F | Slight Chance Rain And Snow Showers | 5 mph N | 26% |
| Tuesday Night | 31°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Wednesday | 49°F | Mostly Sunny | 0 mph | 1% |
| Wednesday Night | 34°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph SE | 20% |
| Thursday | 50°F | Rain Showers Likely | 5 to 15 mph E | 58% |
| Thursday Night | 37°F | Rain Showers Likely | 10 to 15 mph E | 66% |
| Friday | 51°F | Rain Showers Likely | 5 to 10 mph E | 65% |
| Friday Night | 38°F | Rain Showers Likely | 5 mph E | 65% |
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 Sep 19, 2026.