Portsmouth, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portsmouth, a city in Portsmouth City County, Virginia.
Today
76°F
Patchy Fog then Mostly Sunny
Patchy fog before 8am. Mostly sunny, with a high near 76. Southeast wind 3 to 9 mph.
7-day forecast for Portsmouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Patchy Fog then Mostly Sunny | 3 to 9 mph SE | 1% |
| Tonight | 63°F | Mostly Cloudy | 8 mph S | 1% |
| Thursday | 78°F | Mostly Cloudy | 6 to 12 mph S | 10% |
| Thursday Night | 67°F | Mostly Cloudy then Chance Showers And Thunderstorms | 9 mph S | 38% |
| Friday | 73°F | Showers And Thunderstorms | 8 to 12 mph S | 95% |
| Friday Night | 59°F | Showers And Thunderstorms | 3 to 8 mph W | 95% |
| Saturday | 66°F | Mostly Sunny | 9 mph NW | 10% |
| Saturday Night | 47°F | Mostly Clear | 8 mph NW | 7% |
| Sunday | 62°F | Sunny | 8 mph NW | 1% |
| Sunday Night | 45°F | Mostly Clear | 5 to 8 mph W | 6% |
| Monday | 62°F | Sunny | 7 to 10 mph NW | 6% |
| Monday Night | 44°F | Mostly Clear | 5 mph W | 2% |
| Tuesday | 65°F | Sunny | 6 to 10 mph SW | 1% |
| Tuesday Night | 47°F | Mostly Clear | 8 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Portsmouth (36.859, -76.357). Updated through the day.
Growing snapshot for Portsmouth
Last spring frost
Mar 23
First fall frost
Nov 16
Growing season
239 days
Hardiness zone
8b
More local growing data for Portsmouth: nearby ZIP 23707 weather · frost dates · planting calendar · Virginia frost dates
Climate data from the nearest NOAA station, Norfolk S, Va (6.5 mi from Portsmouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.