PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

4:55 AM EDT SEP 10, 2026
Overcast
Light Rain
72°F
Feels Like: 72°F
Dewpoint: 66°F
Rel. Hum.: 81%
Visibility: 7 miles
Wind: SW at 10 mph
Pressure: 29.74 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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Snow Depth pages
TODAY
Mostly sunny. A chance of showers this morning. Highs in the mid 80s. West winds 15 to 20 mph. Gusts up to 35 mph this afternoon. Chance of rain 50 percent.
TONIGHT
Partly cloudy. Lows in the upper 50s. Northwest winds 10 to 15 mph. Gusts up to 30 mph in the evening.
FRIDAY
Mostly sunny. Highs in the mid 70s. Northwest winds around 10 mph.
FRIDAY NIGHT
Clear. Lows in the lower 50s. Light and variable winds.
SATURDAY
Mostly sunny. Highs in the lower 70s. Light and variable winds, becoming southeast around 10 mph in the afternoon.
SATURDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the upper 50s. Chance of rain 30 percent.
SUNDAY
Partly sunny in the morning, then becoming mostly cloudy. A 50 percent chance of showers. Highs in the mid 70s.
SUNDAY NIGHT
Partly cloudy. Lows in the lower 60s.
MONDAY
Partly sunny. Highs in the mid 70s.
MONDAY NIGHT
Mostly clear. Lows in the mid 50s.
TUESDAY
Partly sunny. Highs in the mid 70s.
TUESDAY NIGHT
Partly cloudy. Lows in the lower 60s.
WEDNESDAY
Partly sunny. A chance of showers in the afternoon. Highs in the upper 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  9/ 9/2026
Thursday
10 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 69° 69° Mostly Cloudy 57%
RAIN
>2 in
0% Thunder
( 12% severe)
SW   13 90% 66°
Low 68° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 70° 70° Mostly Cloudy SW   14 87% 66°
High 86° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 70° 70° Partly Cloudy 2%

0% Thunder
( 0% severe)
WSW   12 90% 67°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 80° 82° Clear W   14 58% 64°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 85° 84° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   17 40% 58°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 82° 81° Clear W   14 38% 54°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 72° 72° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   8 49% 52°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 66° 66° Mostly Cloudy WNW   6 63% 53°
Friday
11 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 62° 62° Mostly Cloudy 0%

0% Thunder
( 0% severe)
WNW   6 70% 52°
Low 56° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 58° 57° Partly Cloudy WNW   7 75% 50°
High 75° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 59° 58° Partly Cloudy 0%

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

Clear



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 68° 68° Clear WNW   12 45% 46°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 73° 73° Clear 0%

0% Thunder
( 0% severe)
WNW   12 35% 44°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 74° 74° Clear WNW   10 34% 44°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 63° 63° Clear 0%

0% Thunder
( 0% severe)
WNW   6 54% 46°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 57° 57° Clear WNW   5 69% 47°

PORTSMOUTH, NH extended weather forecast

Saturday
12 SEP 2026
Sunday
13 SEP 2026
Monday
14 SEP 2026
Tuesday
15 SEP 2026
Wednesday
16 SEP 2026
Low 50° Low 59° Low 58° Low 50° Low 57°
High 74° High 72° High 75° High 68° High 79°
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
3% Rain
Overcast
59% Rain
Mostly Cloudy
23% Rain
Partly Cloudy
13% Rain
Partly Cloudy
25% Rain
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