Weather StoryAlmanac, microseasons, and the day's weather story.

Portsmouth, Virginia Weather

Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →

Portsmouth weather forecast — hour by hour, 7-day outlook, NOAA radar

Portsmouth, VA
Sunday, July 5 at 1:36 AM
81
°
Overcast
Feels like
88°
Humidity
72%
Wind
5 mph
Sunrise
1:52 AM
Sunset
4:28 PM
Portsmouth, VA
Hour by hour · 24h
24-Hour ForecastPortsmouth, VA: 24-hour forecast. Temperatures range from 76 to 99 degrees Fahrenheit.
L 76°H 99°
Portsmouth, VA
7-day forecast
  1. Today
    Jul 5
    Overcast
    —
    —
    99°76°—
  2. Monday
    Jul 6
    Light Showers
    71%
    0.15″
    98°74°-1°
  3. Tuesday
    Jul 7
    Thunderstorm
    72%
    3.3″
    95°74°-3°
  4. Wednesday
    Jul 8
    Thunderstorm
    57%
    —
    80°74°-15°
  5. Thursday
    Jul 9
    Mostly Clear
    26%
    —
    96°71°+16°
  6. Friday
    Jul 10
    Partly Cloudy
    24%
    —
    101°77°+5°
  7. Saturday
    Jul 11
    Light Drizzle
    52%
    —
    88°75°-13°
Portsmouth, VA
Next 24 hours · Warm now
HOT 90°70°88°105°12a6a12p6pnow 82°high 99°low 76°
Portsmouth, VA
Anemometer · 24h winds · from true
NESW
From · True
E
082° · backing 125°
Direction
E
082°
Sustained
5
mph
Gust
10
mph
Peak 24h
18
avg 7
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 7 · pk 18 @ 7:00a
0102030MPHB1B2B3B4B5B6-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 2310SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 125° from the e.
Portsmouth, VA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1013.7
0.0 mb in 3h · steady · 29.93 inHg
Now
1013.7
mb
3h
0.0
mb
12h
-1.5
mb
24h
-2.3
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1013–1016
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1016.01012.81013.6
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
Portsmouth, VA
Air quality
59
AQI
Moderate
↓-49 in 6h

AQI 59 (Moderate), driven by PM2.5. AQI down 49 over the last 6 hours — air quality is improving sharply. PM2.5 at 8.8 µg/m³ (AQI 49) with a 0.86 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
8.8μg/m³
PM 10Good
10μg/m³
NO₂Good
5μg/m³
OzoneGood
57μg/m³
UV IndexLow
0.0

What's driving it

PM × Wind × Precip

PM2.5 at 8.8 µg/m³ (AQI 49) with a 0.86 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.86
Wind
light
Recent rain
0h in last 6h
Pattern
stagnant smoke

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³300
Portsmouth, VA
Sky cover · visibility · 24h
Cloud cover
83%
MOSTLY CLOUDY
100%0%−24h−18h−12h−6hnow
Visibility
47.1mi
UNLIMITED
82 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
05:36 UTC · Portsmouth, VA · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
05:36 UTC · Portsmouth, VA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Portsmouth, VA
Satellite · infrared · animated
Portsmouth, VA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Portsmouth, VA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:22 AM
Sunrise
1:52 AM
Daylight
14h 36m
Sunset
4:28 PM
Civil dusk
8:59 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Portsmouth, VA
The moon
Waning Gibbous
75% illuminated
Moonrise
11:20 PM
Moonset
11:16 AM
In sign
♓︎ Pisces
Portsmouth, VA
Microseason
Jul 1–5

Cicadas claim the scorching afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Portsmouth at a glance

  • Today vs. normal: 6°F above the seasonal normal for this latitude
  • Last frost: March 28 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP codes: 23701, 23702, 23703, 23704, 23707, 23708, 23709

15-Day Forecast — Portsmouth

  1. Sun99°76°1%
  2. Mon98°74°71%
  3. Tue95°74°72%
  4. Wed80°74°57%
  5. Thu96°71°26%
  6. Fri101°77°24%
  7. Sat88°75°52%
  8. Sun82°73°34%
  9. Mon84°74°22%
  10. Tue87°69°15%
  11. Wed95°69°25%
  12. Thu91°71°24%
  13. Fri93°71°29%
  14. Sat94°72°35%
  15. Sun98°71°49%

Forecast data from Open-Meteo (CC BY 4.0).

Live wind & temperature near Portsmouth

Right now in the garden

Peak growing season

As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — Portsmouth

SPC has placed Portsmouth in the Marginal Risk category for severe thunderstorms today.

  • TODAYMRGLMarginal Risk
  • TOMORROWMRGLMarginal Risk
  • DAY 3MRGLMarginal Risk

Isolated severe storms possible. Limited threat for hail or damaging wind.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

January 1–5: Frost quiets the live oaks.January 6–10: Still water thickens with ice.January 11–15: Springs begin to move beneath ice.January 16–20: Cardinal dawn calls grow bolder.January 21–25: Late January thaw pulses.January 26–31: Last freeze locks the land.February 1–5: February's lengthening light.February 6–10: Warming winds thaw the margin.February 11–15: Magnolia blooms break the gray.February 16–20: Mockingbirds resume the dawn chorus.February 21–25: Rain replaces the last snow.February 26–28: Mist clings to greening valleys.March 1–5: The green pulse awakens.March 6–10: Hibernators emerge to call.March 11–15: Dogwood and redbud ignite.March 16–20: Swallowtails emerge from winter silk.March 21–25: Light crowns the dogwood canopy.March 26–31: Redbud cascades over the thaw.April 1–5: Thunder announces the wet season.April 6–10: Barn swallows carve the warming sky.April 11–15: Magnolia blooms and falls in a breath.April 16–20: First rainbows arch over thunderheads.April 21–25: Reeds push through marsh water.April 26–30: Frost retreats; seedlings rise free.May 1–5: Warblers flood the canopy in waves.May 6–10: Tulip poplar lights the forest crown.May 11–15: Shad pulse upstream through rapids.May 16–20: Roses open on the Piedmont edge.May 21–25: Fireflies scout the humid dusk.May 26–31: Frog choruses rise from every wetland.June 1–5: Fireflies pulse through the magnolias.June 6–10: Kudzu climbs deeper into green.June 11–15: Sun climbs to its northern throne.June 16–20: Heat settles and the rain begins.June 21–25: The longest day turns toward shadow.June 26–30: Fireflies drift through Spanish moss.July 1–5: Cicadas claim the scorching afternoon.July 6–10: Thunderheads boil and break at dusk.July 11–15: Thunder builds each drowsy afternoon.July 16–20: Cicadas claim the long noon.July 21–25: Dog days drape the earth in haze.July 26–31: Katydids begin their rasping chorus.August 1–5: Dusk arrives one minute earlier each night.August 6–10: Meteorological summer's turning page.August 11–15: Cool winds gather at the margins.August 16–20: Dog-day cicadas rise.August 21–25: Heat breaks in creek beds.August 26–31: Monarchs gather strength.September 1–5: Harvests begin in earnest.September 6–10: Dew beads on resurrection fern.September 11–15: Raptors trail the thermals.September 16–20: Day and dark find balance.September 21–25: Thunder quiets the land.September 26–30: Insects retreat below.October 1–5: Swamp waters recede.October 6–10: Maples ignite the ridge.October 11–15: Asters crown the meadows.October 16–20: Crickets sing at dusk.October 21–25: Frost paints the garden.October 26–31: Light rains whisper down.November 1–5: Sweetgum Turns Crimson.November 6–10: Camellia Blooms Break Through.November 11–15: Earth Stiffens Underfoot.November 16–20: Bare Limbs Hold the Light.November 21–25: First Frost Grips the High Ground.November 26–30: North Wind Strips the Last Leaves.December 1–5: Darkness Falls Before Dinner.December 6–10: Winter Locks the Land.December 11–15: Wildlife Retreats to Shelter.December 16–20: Ice Edges Deepen Inward.December 21–25: The Sun Begins its Return.December 26–31: The Year Turns in Silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Cicadas claim the scorching afternoon

Dog-day cicadas emerge in waves, their rasp dominating every sunny hour; heat peaks above 90 degrees daily.

Day 186 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
Aprillettuce, peas, spinach, radishes—
Maylettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
August—tomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
November——
December——

A year in weather

The year in Portsmouth tops out in July (~83°F) and dips lowest in January (~44°F), with August wettest at 5.8 inches and February driest at 2.7 inches.

MonthMean tempPrecipRainy days
January44°3.4″11
February46°2.7″9
March52°3.8″13
April62°3.5″12
May70°4.2″14
June78°4.6″15
July83°5.5″18
August80°5.8″19
September75°4.5″15
October65°4.1″14
November55°3.4″11
December47°3.3″11

Regional context

Drawing on NOAA NCEI 1991-2020 normals, Portsmouth's January averages 44°F and July 83°F — 39°F apart — while precipitation totals roughly 48.6 inches over some 162 days.

Precipitation in Portsmouth runs summer-dominant: August averages 5.8 inches across 19.0 days of warm-season storms, while February drops to 2.7 inches over 9.0 rainy days of drier cool air. That summer-storm rhythm groups Portsmouth with places like Norfolk, VA, Carrollton, VA and Chesapeake, VA.

By mid-April the frosts ease in Portsmouth, opening the season for peas, lettuce, spinach, and radishes. Warm-soil crops in Portsmouth wait about two weeks past Portsmouth's last frost, once the soil warms. It shuts near mid-November, when freezes return to Portsmouth and tender plants need cover. In Portsmouth, low spots run 4-7°F colder than nearby slopes, nudging Portsmouth's frost dates a week.

Similar climates: Norfolk, VA, Carrollton, VA, Chesapeake, VA, Benns Church, VA, Hampton, VA.

Naturalist notes

Eastern redbuds open their pink blooms along Portsmouth streets by mid-April, timed closely with the last spring frost.

Ospreys return to nest platforms near the Elizabeth River in late March, a reliable marker of the shift toward warmer water.

Frequently asked

When does it freeze in Portsmouth?
In Portsmouth, expect the last spring frost near mid-April; Portsmouth's first autumn frost comes around mid-November.
What is the rainy season in Portsmouth?
August is the wettest month in Portsmouth, about 5.8 inches on average; the year totals roughly 49 inches.
What is the warmest month in Portsmouth?
July is Portsmouth's warmest month, averaging about 83°F.
What is the coldest month in Portsmouth?
Portsmouth bottoms out in January, with a mean near 44°F.
When can I start a vegetable garden in Portsmouth?
Frost-hardy sowings begin at mid-April in Portsmouth; warm-season starts follow two weeks on.
How many rainy days does Portsmouth get?
Portsmouth averages about 162 days with measurable rain or snow each year.
What hardiness zone is Portsmouth?
Portsmouth's USDA zone comes from its January mean (44°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Portsmouth?
Portsmouth's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Portsmouth?
See this week's day-by-day rain chances for Portsmouth in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Portsmouth?
Current conditions for Portsmouth and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Portsmouth forecast updated?
The Portsmouth forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Portsmouth?
Today's sunrise and sunset times for Portsmouth are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Portsmouth?
The next few days in Portsmouth's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Portsmouth, Virginia has a humid subtropical climate: January averages roughly 44°F, July about 83°F, 39°F between them.

Portsmouth sees close to 49 inches of precipitation annually, falling across some 162 wet days.

Latitude 36.8°N gives Portsmouth its 39°F swing, and with it the rhythm of Portsmouth's growing season.

All cities in Virginia →

Virginia Beach, VA weather →

ZIP codes in Portsmouth

  • 23709
  • 23708
  • 23704
  • 23707
  • 23701
  • 23703
  • 23702
  • 23705

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.