PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

2:55 AM EDT SEP 23, 2026
Few Clouds
45°F
Feels Like: 44°F
Dewpoint: 41°F
Rel. Hum.: 86%
Visibility: 10 miles
Wind: NNW at 3 mph
Pressure: 30.48 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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REST OF TONIGHT
Partly cloudy. Lows in the mid 40s. Northeast winds around 10 mph with gusts up to 20 mph.
WEDNESDAY
Mostly sunny. Highs in the lower 60s. Northeast winds 10 to 15 mph with gusts up to 30 mph.
WEDNESDAY NIGHT
Mostly clear. Lows in the mid 40s. Northeast 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. Northeast winds around 10 mph. Gusts up to 25 mph after midnight.
FRIDAY
Mostly cloudy. Highs in the mid 60s.
FRIDAY NIGHT
Cloudy with a 50 percent chance of rain. Lows in the lower 50s.
SATURDAY
Rain likely. Highs in the lower 60s. Chance of rain 70 percent.
SATURDAY NIGHT
Rain likely in the evening, then showers likely after midnight. Lows around 50. Chance of rain 70 percent.
SUNDAY
Showers likely. Highs in the lower 60s. Chance of rain 70 percent.
SUNDAY NIGHT
Showers likely. Lows in the upper 40s. Chance of rain 70 percent.
MONDAY
Mostly cloudy in the morning, then becoming partly sunny. A 50 percent chance of showers. Highs in the lower 60s.
MONDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows in the upper 40s. 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  9/22/2026
Wednesday
23 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 46° 42° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNE   7 89% 43°
Low 43° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 44° 38° Partly Cloudy NNE   10 96% 43°
High 63° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 48° 43° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNE   10 89% 45°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 58° 55° Clear ENE   15 64% 46°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 59° 56° Clear 0%

0% Thunder
( 0% severe)
ENE   16 60% 45°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 57° 54° Clear ENE   12 59% 43°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 52° 50° Clear 0%

0% Thunder
( 0% severe)
ENE   7 71% 43°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 48° 45° Clear NNE   6 89% 45°
Thursday
24 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 46° 42° Clear 0%

0% Thunder
( 0% severe)
NNE   7 93% 44°
Low 43° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 44° 39° Clear NNE   8 96% 43°
High 63° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 47° 43° Clear 0%

0% Thunder
( 0% severe)
NNE   9 86% 43°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 58° 55° Clear NE   13 57% 43°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 61° 59° Partly Cloudy 0%

0% Thunder
( 0% severe)
ENE   14 50% 42°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 58° 56° Partly Cloudy ENE   12 55% 42°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 53° 51° Partly Cloudy 0%

0% Thunder
( 0% severe)
NE   6 66% 42°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 49° 46° Mostly Cloudy NNE   7 80% 43°

PORTSMOUTH, NH extended weather forecast

Friday
25 SEP 2026
Saturday
26 SEP 2026
Sunday
27 SEP 2026
Monday
28 SEP 2026
Tuesday
29 SEP 2026
Low 47° Low 52° Low 52° Low 52° Low 51°
High 66° High 63° High 63° High 67° High 69°
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
Mostly Cloudy
29% Rain
Overcast
74% Rain
Overcast
83% Rain
Mostly Cloudy
57% Rain
Partly Cloudy
33% Rain
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