PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

3:55 PM EDT AUG 29, 2026
Few Clouds
77°F
Feels Like: 78°F
Dewpoint: 52°F
Rel. Hum.: 42%
Visibility: 10 miles
Wind: SSE at 14 mph
Pressure: 30.12 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear this evening, then becoming partly cloudy. Lows in the upper 50s. Light and variable winds.
SUNDAY
Partly sunny. Warm with highs in the mid 80s. Light and variable winds, becoming west around 10 mph in the afternoon.
SUNDAY NIGHT
Mostly cloudy with a slight chance of showers in the evening, then partly cloudy after midnight. Lows in the lower 60s. Light and variable winds. Chance of rain 20 percent.
MONDAY
Mostly sunny. Highs in the mid 70s. Light and variable winds, becoming southeast around 10 mph in the afternoon.
MONDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows around 60. Light and variable winds.
TUESDAY
A chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 70 percent.
TUESDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the lower 60s. Chance of rain 70 percent.
WEDNESDAY
Mostly cloudy with a 40 percent chance of showers. Highs in the mid 70s.
WEDNESDAY NIGHT
Showers likely. Lows in the lower 60s. Chance of rain 60 percent.
THURSDAY
Mostly cloudy with a 50 percent chance of showers. Highs in the upper 70s.
THURSDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. A 50 percent chance of showers. Lows in the lower 60s.
FRIDAY
Partly sunny with a 40 percent chance of showers. Highs in the mid 70s.
FRIDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows in the upper 50s. 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 AM EDT  8/29/2026
Saturday
29 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 76° 78° Clear 0%

0% Thunder
( 0% severe)
S   7 39% 49°
High 77° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 75° 75° Clear S   9 41% 50°
Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 67° 67° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   7 63% 54°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 61° 62° Partly Cloudy SW   3 84% 56°
Sunday
30 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 59° 59° Mostly Cloudy 2%

0% Thunder
( 0% severe)
WSW   5 83% 54°
Low 58° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 59° 58° Mostly Cloudy SW   6 78% 52°
High 86° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 64° 64° Partly Cloudy 2%

0% Thunder
( 1% severe)
WSW   7 70% 54°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 78° 79° Mostly Cloudy WSW   9 47% 56°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 84° 83° Mostly Cloudy 8%

0% Thunder
( 3% severe)
WSW   12 36% 54°
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
( 7% severe)
WSW   8 57% 58°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 69° 69° Mostly Cloudy W   7 76% 61°
Monday
31 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 67° 67° Mostly Cloudy 3%

0% Thunder
( 1% severe)
WNW   6 81% 61°
Low 62° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 63° 64° Partly Cloudy NNW   5 93% 61°
High 78° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 65° 65° Clear 1%

0% Thunder
( 0% severe)
NNW   3 84% 60°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 74° 74° Clear ENE   6 53% 56°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 76° 78° Clear 0%

0% Thunder
( 1% severe)
ESE   8 46% 54°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 73° 73° Partly Cloudy SSE   9 51% 54°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 67° 67° Clear     SSE   6 70% 57°

PORTSMOUTH, NH extended weather forecast

Tuesday
1 SEP 2026
Wednesday
2 SEP 2026
Thursday
3 SEP 2026
Friday
4 SEP 2026
Saturday
5 SEP 2026
Low 60° Low 58° Low 59° Low 58° Low 61°
High 68° High 69° High 72° High 74° High 78°
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
Overcast
55% Rain
Overcast
34% Rain
Overcast
61% Rain
Overcast
33% Rain
Overcast
41% Rain
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