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.
Overnight
49°F
Rain
Rain. Cloudy, with a low around 49. South wind around 15 mph. Chance of precipitation is 100%.
7-day forecast for Old Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Rain | 15 mph S | 98% |
| Tuesday | 53°F | Rain | 5 to 15 mph SE | 98% |
| Tuesday Night | 49°F | Chance Light Rain | 5 mph E | 54% |
| Wednesday | 53°F | Chance Light Rain | 5 mph E | 52% |
| Wednesday Night | 50°F | Chance Light Rain | 0 to 5 mph SE | 53% |
| Thursday | 55°F | Chance Light Rain | 0 to 5 mph SE | 46% |
| Thursday Night | 50°F | Chance Light Rain | 0 to 5 mph S | 32% |
| Friday | 62°F | Slight Chance Light Rain then Mostly Cloudy | 0 to 10 mph SW | 16% |
| Friday Night | 51°F | Mostly Cloudy | 5 to 10 mph SW | 9% |
| Saturday | 64°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph W | 15% |
| Saturday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph SW | 15% |
| Sunday | 64°F | Chance Rain Showers | 0 to 5 mph NW | 31% |
| Sunday Night | 51°F | Chance Rain Showers | 5 mph W | 36% |
| Monday | 61°F | Chance Rain Showers | 5 mph W | 50% |
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 Aug 4, 2026.