PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

10:55 AM EDT SEP 22, 2026
Broken Clouds
64°F
Feels Like: 64°F
Dewpoint: 45°F
Rel. Hum.: 50%
Visibility: 10 miles
Wind: NNE at 9 mph
Pressure: 30.39 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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TODAY
Mostly cloudy this morning, then becoming partly sunny. Highs in the lower 60s. Northeast winds around 10 mph with gusts up to 25 mph.
TONIGHT
Partly cloudy. Lows in the mid 40s. Light and variable winds, becoming northeast around 10 mph after midnight.
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 with gusts up to 20 mph.
THURSDAY
Mostly sunny. Highs in the lower 60s. Northeast winds 10 to 15 mph with gusts up to 30 mph.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s.
FRIDAY
Mostly cloudy with a 40 percent chance of showers. Highs in the lower 60s.
FRIDAY NIGHT
Showers likely. Lows in the lower 50s. Chance of rain 60 percent.
SATURDAY
Showers likely. Highs in the lower 60s. Chance of rain 60 percent.
SATURDAY NIGHT
Showers likely. Lows around 50. Chance of rain 70 percent.
SUNDAY
Showers likely in the morning, then partly sunny with a chance of showers in the afternoon. Highs in the lower 60s. Chance of rain 60 percent.
SUNDAY NIGHT
Partly cloudy with a 50 percent chance of showers. Lows in the upper 40s.
MONDAY
Partly sunny. A chance of showers in the morning. Highs in the mid 60s. 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  9/21/2026
Tuesday
22 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 52° 49° Mostly Cloudy 4%

0% Thunder
( 0% severe)
NNE   8 77% 45°
Low 49° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 50° 46° Mostly Cloudy NNE   9 77% 43°
High 64° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 50° 46° Mostly Cloudy 0%

0% Thunder
( 0% severe)
NNE   10 74% 42°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 59° 57° Partly Cloudy NE   12 47% 39°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 61° 59° Partly Cloudy 0%

0% Thunder
( 0% severe)
ENE   12 48% 41°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 58° 56° Partly Cloudy E   9 51% 40°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 54° 53° Partly Cloudy 0%

0% Thunder
( 0% severe)
ENE   5 66% 43°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 50° 48° Mostly Cloudy NNE   5 83% 45°
Wednesday
23 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 48° 45° Partly Cloudy 0%

0% Thunder
( 1% severe)
NNE   7 86% 44°
Low 45° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 46° 41° Partly Cloudy NNE   10 89% 43°
High 64° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 49° 44° Partly Cloudy 0%

0% Thunder
( 1% severe)
NNE   12 80% 43°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 59° 56° Partly Cloudy ENE   15 55% 43°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 61° 58° Partly Cloudy 0%

0% Thunder
( 0% severe)
ENE   17 50% 42°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 59° 56° Clear ENE   14 49% 40°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 53° 50° Clear 0%

0% Thunder
( 0% severe)
ENE   8 69% 43°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 50° 47° Clear NE   7 83% 45°

PORTSMOUTH, NH extended weather forecast

Thursday
24 SEP 2026
Friday
25 SEP 2026
Saturday
26 SEP 2026
Sunday
27 SEP 2026
Monday
28 SEP 2026
Low 45° Low 46° Low 50° Low 51° Low 52°
High 62° High 61° High 65° High 65° High 67°
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
Clear
3% Rain
Mostly Cloudy
66% Rain
Overcast
78% Rain
Mostly Cloudy
63% Rain
Overcast
52% Rain
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