Herald Harbor, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Herald Harbor, a community in Anne Arundel County, Maryland.
Today
80°F
Partly Sunny
Partly sunny, with a high near 80. Northeast wind 6 to 9 mph.
7-day forecast for Herald Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Partly Sunny | 6 to 9 mph NE | 5% |
| Tonight | 66°F | Mostly Cloudy | 8 mph SE | 14% |
| Sunday | 84°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 6 to 12 mph S | 28% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 2 to 10 mph W | 71% |
| Monday | 74°F | Chance Rain Showers | 12 mph NE | 32% |
| Monday Night | 59°F | Chance Rain Showers | 12 mph NE | 38% |
| Tuesday | 69°F | Chance Rain Showers | 13 to 16 mph NE | 52% |
| Tuesday Night | 57°F | Chance Rain Showers | 16 mph NE | 52% |
| Wednesday | 67°F | Chance Rain Showers | 17 mph NE | 41% |
| Wednesday Night | 57°F | Chance Rain Showers | 14 to 17 mph NE | 42% |
| Thursday | 67°F | Chance Rain Showers | 17 mph NE | 42% |
| Thursday Night | 55°F | Chance Rain Showers | 9 to 16 mph N | 36% |
| Friday | 70°F | Chance Rain Showers | 14 mph N | 25% |
| Friday Night | 55°F | Slight Chance Rain Showers | 7 to 12 mph N | 17% |
Forecast source: National Weather Service (api.weather.gov) for Herald Harbor (39.051, -76.575). Updated through the day.
Growing snapshot for Herald Harbor
Last spring frost
Mar 27
First fall frost
Nov 13
Growing season
234 days
Hardiness zone
8a
More local growing data for Herald Harbor: nearby ZIP 21146 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Annapolis Police Brks, Md (6.5 mi from Herald Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.