PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

3:55 AM EDT SEP 24, 2026
Clear
46°F
Feels Like: 42°F
Dewpoint: 45°F
Rel. Hum.: 96%
Visibility: 10 miles
Wind: N at 7 mph
Pressure: 30.49 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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Snow Depth pages
REST OF TONIGHT
Mostly clear. Lows in the upper 40s. North winds around 10 mph.
THURSDAY
Mostly sunny. Highs in the lower 60s. Northeast winds around 10 mph with gusts up to 25 mph.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 40s. Light and variable winds, becoming north around 10 mph with gusts up to 20 mph after midnight.
FRIDAY
Mostly cloudy. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 30 mph.
FRIDAY NIGHT
Mostly cloudy. A chance of rain in the evening, then rain likely after midnight. Lows around 50. Northeast winds 15 to 20 mph. Gusts up to 35 mph after midnight. Chance of rain 70 percent.
SATURDAY
Rain. Highs around 60. Chance of rain 80 percent.
SATURDAY NIGHT
Rain. Lows in the upper 40s. Chance of rain 90 percent.
SUNDAY
Rain. Highs around 60. Chance of rain 90 percent.
SUNDAY NIGHT
Rain in the evening, then showers after midnight. Lows in the upper 40s. Chance of rain 90 percent.
MONDAY
Showers. Highs around 60. Chance of rain 80 percent.
MONDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the upper 40s.
TUESDAY
Partly sunny. Highs in the mid 60s.
TUESDAY NIGHT
Partly cloudy. Lows in the upper 40s.

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  9/23/2026
Thursday
24 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 46° 43° Partly Cloudy 0%

0% Thunder
( 0% severe)
N   6 100% 46°
Low 44° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 45° 41° Partly Cloudy NNE   8 100% 45°
High 63° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 47° 43° Clear 0%

0% Thunder
( 0% severe)
NNE   9 93% 45°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 60° 58° Clear NE   13 53% 43°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 63° 61° Clear 0%

0% Thunder
( 0% severe)
ENE   14 46% 42°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 61° 60° Clear ENE   10 51% 43°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 53° 51° Mostly Cloudy 0%

0% Thunder
( 0% severe)
NE   6 69% 43°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 50° 48° Mostly Cloudy N   6 83% 45°
Friday
25 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 48° 44° Mostly Cloudy 0%

0% Thunder
( 0% severe)
N   8 89% 45°
Low 47° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 49° 44° Mostly Cloudy NNE   12 89% 46°
High 66° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 52° 48° Mostly Cloudy 4%

0% Thunder
( 0% severe)
NNE   13 83% 47°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 63° 61° Mostly Cloudy NNE   16 56% 47°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 66° 66° Mostly Cloudy 11%
RAIN
.01–.1 in
0% Thunder
( 0% severe)
NE   17 48% 46°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 64° 63° Mostly Cloudy NE   15 56% 48°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 59° 57° Mostly Cloudy 35%
RAIN
.5–1 in
0% Thunder
( 2% severe)
NE   13 64% 47°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 57° 54° Mostly Cloudy NE   14 75% 49°

PORTSMOUTH, NH extended weather forecast

Saturday
26 SEP 2026
Sunday
27 SEP 2026
Monday
28 SEP 2026
Tuesday
29 SEP 2026
Wednesday
30 SEP 2026
Low 54° Low 51° Low 51° Low 50° Low 52°
High 58° High 59° High 60° High 67° High 70°
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
Overcast
94% Rain
Overcast
99% Rain
Overcast
75% Rain
Mostly Cloudy
44% Rain
Mostly Cloudy
37% Rain
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