PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

9:55 AM EDT AUG 19, 2026
Overcast
72°F
Feels Like: 72°F
Dewpoint: 66°F
Rel. Hum.: 81%
Visibility: 7 miles
Wind: Calm
Pressure: 29.87 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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Snow Depth pages
TODAY
Patchy fog this morning. Partly sunny. Highs in the mid 80s. Light and variable winds.
TONIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. Light and variable winds.
THURSDAY
Partly sunny. Patchy fog in the morning. A slight chance of showers in the afternoon. Highs in the lower 80s. Light and variable winds. Chance of rain 20 percent.
THURSDAY NIGHT
Mostly cloudy in the evening, then clearing. Lows around 60. Light and variable winds.
FRIDAY
Mostly sunny. Highs in the upper 70s. Light and variable winds.
FRIDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s.
SATURDAY
Partly sunny. A chance of showers in the afternoon. Highs in the mid 70s. Chance of rain 30 percent.
SATURDAY NIGHT
Mostly cloudy with a 40 percent chance of showers. Lows in the upper 50s.
SUNDAY
Mostly cloudy with a 40 percent chance of showers. Highs in the upper 70s.
SUNDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows around 60. Chance of rain 40 percent.
MONDAY
Partly sunny. Highs in the lower 80s.
MONDAY NIGHT
Mostly clear. Lows in the upper 50s.
TUESDAY
Mostly sunny. Highs in the lower 80s.

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  8/18/2026
Wednesday
19 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 64° 66° Partly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 100% 64°
Low 62° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 63° 64° Mostly Cloudy   CALM 100% 63°
High 85° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 66° 66° Mostly Cloudy 4%

0% Thunder
( 1% severe)
  CALM 97% 65°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 78° 80° Partly Cloudy SSW   3 67% 66°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 82° 83° Partly Cloudy 2%

0% Thunder
( 1% severe)
S   8 53% 63°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 81° 82° Partly Cloudy SSW   9 54% 63°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 74° 74° Partly Cloudy 2%

0% Thunder
( 1% severe)
SW   6 69% 63°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 69° 69° Partly Cloudy SW   3 78% 62°
Thursday
20 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 66° 66° Partly Cloudy 3%

0% Thunder
( 0% severe)
WSW   3 87% 62°
Low 64° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 65° 65° Mostly Cloudy W   3 87% 61°
High 83° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 69° 69° Partly Cloudy 1%

0% Thunder
( 0% severe)
NW   5 78% 62°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 79° 80° Mostly Cloudy NW   5 54% 61°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 81° 82° Partly Cloudy 12%
RAIN
<.01 in
0% Thunder
( 4% severe)
S   7 49% 60°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 78° 79° Mostly Cloudy SSW   7 54% 60°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 71° 71° Mostly Cloudy 3%

0% Thunder
( 4% severe)
W   3 71% 61°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 66° 66° Partly Cloudy NNW   2 84% 61°

PORTSMOUTH, NH extended weather forecast

Friday
21 AUG 2026
Saturday
22 AUG 2026
Sunday
23 AUG 2026
Monday
24 AUG 2026
Tuesday
25 AUG 2026
Low 59° Low 58° Low 59° Low 59° Low 56°
High 78° High 74° High 74° High 79° High 76°
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
10% Rain
Mostly Cloudy
18% Rain
Overcast
51% Rain
Partly Cloudy
33% Rain
Partly Cloudy
19% Rain
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