Fern Forest, HI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fern Forest, a community in Hawaii County, Hawaii.
Today
74°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 74. North northeast wind around 12 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Fern Forest
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Chance Rain Showers | 12 mph NNE | 70% |
| Tonight | 66°F | Chance Rain Showers | 13 mph N | 57% |
| Saturday | 73°F | Scattered Rain Showers | 10 to 17 mph N | 48% |
| Saturday Night | 66°F | Scattered Rain Showers | 13 mph N | 39% |
| Sunday | 75°F | Scattered Rain Showers then Partly Sunny | 15 mph NNE | 34% |
| Sunday Night | 66°F | Scattered Rain Showers | 15 mph N | 45% |
| Monday | 75°F | Scattered Rain Showers | 16 mph N | 43% |
| Monday Night | 68°F | Chance Rain Showers | 14 mph N | 72% |
| Tuesday | 73°F | Occasional Rain Showers | 14 mph NNE | 75% |
| Tuesday Night | 68°F | Occasional Rain Showers | 10 to 14 mph N | 81% |
| Wednesday | 72°F | Chance Rain Showers | 12 mph NNE | 72% |
| Wednesday Night | 67°F | Occasional Rain Showers | 8 to 12 mph N | 75% |
| Thursday | 72°F | Chance Rain Showers | 8 to 12 mph NNE | 73% |
| Thursday Night | 66°F | Occasional Rain Showers | 8 to 14 mph NNE | 76% |
Forecast source: National Weather Service (api.weather.gov) for Fern Forest (19.465, -155.132). Updated through the day.
Growing snapshot for Fern Forest
Growing season
365 days
More local growing data for Fern Forest: nearby ZIP 96778 weather · frost dates · planting calendar · Hawaii frost dates
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Climate data from the nearest NOAA station, Glenwood #2 55.4, Hi (7.2 mi from Fern Forest). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.