Old Harbor, AK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Old Harbor, a city in Kodiak Island Borough County, Alaska.
Today
50°F
Light Rain
Rain. Cloudy, with a high near 50. Northeast wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%.
7-day forecast for Old Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 50°F | Light Rain | 15 to 20 mph NE | 90% |
| Tonight | 44°F | Light Rain | 20 to 30 mph N | 76% |
| Sunday | 50°F | Rain Showers Likely | 10 to 20 mph NW | 58% |
| Sunday Night | 38°F | Chance Rain Showers | 5 to 15 mph W | 54% |
| Monday | 47°F | Rain Showers Likely | 5 mph NW | 69% |
| Monday Night | 39°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph NW | 55% |
| Tuesday | 49°F | Slight Chance Rain Showers then Partly Sunny | 5 to 10 mph NW | 18% |
| Tuesday Night | 37°F | Partly Cloudy | 5 to 10 mph NW | 5% |
| Wednesday | 50°F | Mostly Sunny then Slight Chance Rain Showers | 5 mph W | 15% |
| Wednesday Night | 41°F | Rain Showers Likely | 5 mph S | 67% |
| Thursday | 51°F | Rain Showers | 5 to 15 mph SE | 77% |
| Thursday Night | 46°F | Rain Showers | 15 mph S | 86% |
| Friday | 52°F | Rain Showers | 15 mph SW | 83% |
| Friday Night | 46°F | Rain Showers | 10 to 15 mph S | 79% |
Forecast source: National Weather Service (api.weather.gov) for Old Harbor (57.219, -153.330). Updated through the day.
Growing snapshot for Old Harbor
Last spring frost
May 5
First fall frost
Oct 3
Growing season
151 days
More local growing data for Old Harbor: nearby ZIP 99643 weather · frost dates · planting calendar · Alaska frost dates
Nearby towns & communities
Akhiok
Aleneva
Chiniak
Karluk
Kodiak
Kodiak Station
Larsen Bay
Mill Bay
Ouzinkie
Port Lions
Womens Bay
Climate data from the nearest NOAA station, Kodiak Ap, Ak (48.3 mi from Old Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.