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.
Tonight
52°F
Mostly Clear then Patchy Fog
Patchy fog after 4am. Mostly clear, with a low around 52. South wind 2 to 6 mph.
7-day forecast for Herald Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear then Patchy Fog | 2 to 6 mph S | 2% |
| Wednesday | 74°F | Patchy Fog then Mostly Sunny | 2 to 9 mph S | 3% |
| Wednesday Night | 62°F | Mostly Cloudy | 5 to 8 mph S | 14% |
| Thursday | 75°F | Chance Light Rain | 6 to 9 mph S | 43% |
| Thursday Night | 62°F | Light Rain Likely | 2 to 7 mph S | 63% |
| Friday | 71°F | Rain | 2 to 6 mph NE | 77% |
| Friday Night | 51°F | Light Rain | 5 mph NW | 77% |
| Saturday | 66°F | Mostly Sunny | 6 to 10 mph NW | 11% |
| Saturday Night | 43°F | Partly Cloudy | 5 to 8 mph NW | 11% |
| Sunday | 62°F | Mostly Sunny | 8 mph W | 5% |
| Sunday Night | 42°F | Partly Cloudy then Slight Chance Light Rain | 7 mph W | 20% |
| Monday | 62°F | Slight Chance Light Rain | 8 to 13 mph W | 20% |
| Monday Night | 40°F | Slight Chance Light Rain | 5 to 8 mph W | 18% |
| Tuesday | 65°F | Sunny | 8 to 12 mph W | 14% |
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 Nov 4, 2026.