PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

3:55 AM EDT AUG 29, 2026
Broken Clouds
63°F
Feels Like: 63°F
Dewpoint: 54°F
Rel. Hum.: 72%
Visibility: 10 miles
Wind: NW at 6 mph
Pressure: 30.09 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Sunny. Highs in the upper 70s. Light and variable winds.
TONIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s. Light and variable winds.
SUNDAY
Partly sunny. Highs in the mid 80s. Southwest winds around 10 mph.
SUNDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 60s. Light and variable winds.
MONDAY
Mostly sunny. Highs in the mid 70s. Light and variable winds.
MONDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s.
TUESDAY
Partly sunny. A chance of showers in the afternoon. Highs in the lower 70s. Chance of rain 40 percent.
TUESDAY NIGHT
Mostly cloudy with a chance of showers. Lows around 60. Chance of rain 50 percent.
WEDNESDAY
Showers likely. Highs in the lower 70s. Chance of rain 70 percent.
WEDNESDAY NIGHT
Showers likely. Lows in the lower 60s. Chance of rain 70 percent.
THURSDAY
Mostly cloudy with a 50 percent chance of showers. Highs in the upper 70s.
THURSDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 40 percent.
FRIDAY
Partly sunny. A chance of showers in the afternoon. Highs in the mid 70s. Chance of rain 30 percent.

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 PM EDT  8/28/2026
Saturday
29 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 62° 62° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   6 87% 58°
Low 56° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 57° 56° Partly Cloudy NW   6 90% 54°
High 79° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 60° 60° Clear 0%

0% Thunder
( 0% severe)
NW   6 81% 54°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 72° 72° Clear   CALM 48% 51°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 76° 78° Clear 0%

0% Thunder
( 0% severe)
S   6 40% 50°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 75° 75° Clear S   9 41% 50°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 67° 67° Clear 0%

0% Thunder
( 0% severe)
S   7 63% 54°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 62° 63° Partly Cloudy SW   3 78% 55°
Sunday
30 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 60° 60° Partly Cloudy 1%

0% Thunder
( 0% severe)
WSW   5 81% 54°
Low 59° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 59° 58° Partly Cloudy WSW   6 80% 53°
High 86° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 64° 64° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   7 73% 55°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 78° 79° Partly Cloudy SW   9 47% 56°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 84° 83° Mostly Cloudy 1%

0% Thunder
( 2% severe)
WSW   12 37% 55°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 82° 82° Mostly Cloudy WSW   10 41% 56°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 74° 74° Mostly Cloudy 3%

0% Thunder
( 3% severe)
WSW   8 57% 58°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 69° 69° Mostly Cloudy WSW   7 76% 61°

PORTSMOUTH, NH extended weather forecast

BAD DAY
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Low 54° Low 63° Low 59° Low 58° Low 61°
High 85° High 75° High 69° High 73° High 82°
PORTSMOUTH, NH 03803 weather forecast Day 3 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
Partly Cloudy
4% Rain
Overcast
13% Rain
Overcast
62% Rain
Overcast
45% Rain
Mostly Cloudy
43% Rain
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