PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

7:55 PM EDT SEP 5, 2026
Broken Clouds
63°F
Feels Like: 63°F
Dewpoint: 61°F
Rel. Hum.: 93%
Visibility: 10 miles
Wind: Calm
Pressure: 29.88 inches
Last 72 hours

Local Area Snow Depth

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy. Scattered showers in the evening. Lows in the mid 50s. Light and variable winds. Chance of rain 50 percent.
SUNDAY
Mostly sunny. A slight chance of showers in the afternoon. Highs around 70. Light and variable winds. Chance of rain 20 percent.
SUNDAY NIGHT
Mostly clear. Lows in the mid 50s. Light and variable winds.
LABOR DAY
Sunny. Highs in the upper 70s. Light and variable winds.
MONDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s.
TUESDAY
Mostly sunny. Highs in the upper 70s.
TUESDAY NIGHT
Partly cloudy. Lows in the upper 50s.
WEDNESDAY
Partly sunny in the morning, then becoming mostly cloudy. Highs in the mid 70s.
WEDNESDAY NIGHT
Showers likely. Lows in the mid 60s. Chance of rain 60 percent.
THURSDAY
Partly sunny. A chance of showers in the morning. Highs in the lower 80s. Chance of rain 30 percent.
THURSDAY NIGHT
Partly cloudy. Lows in the mid 50s.
FRIDAY
Mostly sunny. Highs around 70.

Visible Weather Satellite
PORTSMOUTH, NH 03803
Infrared Weather Satellite
PORTSMOUTH, NH 03803
NEXRAD Weather Radar
PORTSMOUTH, NH 03803

PORTSMOUTH, NH 3 hourly weather forecast

weather forecast created  8:00 AM EDT  9/ 5/2026
Saturday
5 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 69° 69° Mostly Cloudy 24%
RAIN
.1–.25 in
0% Thunder
( 7% severe)
ENE   9 68% 58°
High 70° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 68° 68° Partly Cloudy E   7 63% 55°
Partly Cloudy

Chance of Rain

PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 65° 65° Partly Cloudy 3%

0% Thunder
( 2% severe)
  CALM 73% 56°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 60° 60° Partly Cloudy NA   5 87% 56°
Sunday
6 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 57° 56° Mostly Cloudy 6%

0% Thunder
( 2% severe)
N   6 93% 55°
Low 54° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 55° 54° Partly Cloudy N   6 93% 53°
High 74° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 58° 57° Partly Cloudy 5%

0% Thunder
( 4% severe)
N   7 83% 53°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 67° 67° Clear N   8 54% 50°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 71° 71° Partly Cloudy 9%

0% Thunder
( 5% severe)
N   7 42% 47°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 70° 70° Partly Cloudy N   6 45% 48°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 64° 65° Clear 0%

0% Thunder
( 1% severe)
N   3 60% 50°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 59° 58° Clear NW   6 72% 50°
Monday
7 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 56° 55° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   6 80% 50°
Low 54° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 54° 52° Clear WNW   7 83% 49°
High 80° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 59° 58° Clear 0%

0% Thunder
( 0% severe)
NW   8 72% 50°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 73° 73° Clear NW   8 43% 49°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 78° 78° Clear 0%

0% Thunder
( 1% severe)
NW   8 35% 48°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 78° 78° Clear WNW   8 36% 49°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 69° 69° Clear     WNW   7 53% 51°

PORTSMOUTH, NH extended weather forecast

Tuesday
8 SEP 2026
Wednesday
9 SEP 2026
Thursday
10 SEP 2026
Friday
11 SEP 2026
Saturday
12 SEP 2026
Low 57° Low 54° Low 59° Low 51° Low 47°
High 75° High 70° High 75° High 67° High 68°
PORTSMOUTH, NH 03803 weather forecast Day 4 PORTSMOUTH, NH 03803 weather forecast Day 5 PORTSMOUTH, NH 03803 weather forecast Day 6 PORTSMOUTH, NH 03803 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Clear
1% Rain
Overcast
45% Rain
Mostly Cloudy
57% Rain
Clear
19% Rain
Clear
11% Rain
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