Portsmouth, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portsmouth, a city in Portsmouth City County, Virginia.
This Afternoon
87°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 5pm. Mostly sunny, with a high near 87. Northeast wind around 8 mph. Chance of precipitation is 20%.
7-day forecast for Portsmouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 87°F | Slight Chance Showers And Thunderstorms | 8 mph NE | 15% |
| Tonight | 72°F | Mostly Cloudy | 8 mph NE | 11% |
| Saturday | 81°F | Partly Sunny | 8 to 13 mph NE | 9% |
| Saturday Night | 71°F | Partly Cloudy | 6 to 12 mph E | 9% |
| Sunday | 85°F | Sunny | 5 to 8 mph SE | 4% |
| Sunday Night | 71°F | Mostly Clear | 5 to 8 mph S | 7% |
| Monday | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph N | 54% |
| Monday Night | 71°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 mph NE | 57% |
| Tuesday | 79°F | Showers And Thunderstorms Likely | 12 to 22 mph NE | 67% |
| Tuesday Night | 69°F | Showers And Thunderstorms Likely | 20 to 23 mph NE | 67% |
| Wednesday | 75°F | Showers And Thunderstorms Likely | 21 to 24 mph NE | 59% |
| Wednesday Night | 67°F | Showers And Thunderstorms Likely | 21 to 24 mph NE | 59% |
| Thursday | 74°F | Chance Rain Showers | 20 to 23 mph NE | 49% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms | 14 to 22 mph N | 47% |
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 Sep 18, 2026.