PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

Enter ZIP code or City, State   
    


PORTSMOUTH, NH
Current Weather

11:55 PM EDT SEP 21, 2026
Broken Clouds
57°F
Feels Like: 55°F
Dewpoint: 45°F
Rel. Hum.: 64%
Visibility: 10 miles
Wind: NNE at 10 mph
Pressure: 30.23 inches
Last 72 hours

Local Area Snow Depth

New Hampshire Current Weather

New Hampshire MOS Forecast Weather


Weather Map


(Automated weather data from NWS/FAA)
10-Day model forecast maps
2026 Hurricanes

PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s. Light and variable winds, becoming northeast around 10 mph with gusts up to 20 mph after midnight.
TUESDAY
Mostly cloudy in the morning, then clearing. Highs in the lower 60s. Northeast winds around 10 mph with gusts up to 20 mph.
TUESDAY NIGHT
Partly cloudy. Lows in the mid 40s. Light and variable winds, becoming northeast around 10 mph with gusts up to 20 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.
THURSDAY
Partly sunny. Highs in the lower 60s.
THURSDAY NIGHT
Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the upper 40s. Chance of rain 30 percent.
FRIDAY
Mostly cloudy with a 50 percent chance of showers. Highs in the lower 60s.
FRIDAY NIGHT
Showers likely. Lows around 50. Chance of rain 70 percent.
SATURDAY
Showers likely. Highs in the lower 60s. Chance of rain 70 percent.
SATURDAY NIGHT
Showers likely, mainly in the evening. Lows around 50. Chance of rain 60 percent.
SUNDAY
Mostly cloudy with a 50 percent chance of showers. Highs in the mid 60s.

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

BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
Low 45° Low 44° Low 47° Low 50° Low 50°
High 58° High 61° High 66° High 61° High 61°
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
6% Rain
Partly Cloudy
8% Rain
Overcast
69% Rain
Overcast
68% Rain
Overcast
57% Rain
SELECT BOX EXAMPLES:
for LOCAL WEATHER:
SNOW DEPTH:
LOCAL WEATHER RADAR:
STATE WEATHER MAP:
Portsmouth, NH
Portsmouth, NH snow
Portsmouth, NH radar
NH map
-or-
-or-
-or-
 
03803
03803 snow
03803 radar
 
-or-
-or-
 
 
NH
NH snow
 
 
Copyright © 2026 WeatherStreet.com
Put our free WeatherStreet weather lookup on your web page.
Terms & Conditions