PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

Enter ZIP code or City, State   
    


PORTSMOUTH, NH
Current Weather

10:55 AM EDT SEP 29, 2026
Overcast
63°F
Feels Like: 63°F
Dewpoint: 57°F
Rel. Hum.: 81%
Visibility: 10 miles
Wind: NNW at 8 mph
Pressure: 29.92 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
TODAY
Mostly cloudy. A slight chance of rain this morning. Patchy fog this morning. Highs in the upper 60s. Light and variable winds. Chance of rain 20 percent.
TONIGHT
Mostly cloudy. Patchy fog. Lows in the lower 50s. Light and variable winds.
WEDNESDAY
Patchy fog in the morning. Partly sunny. Highs in the upper 60s. Light and variable winds.
WEDNESDAY NIGHT
Partly cloudy. Lows in the lower 50s. Light and variable winds.
THURSDAY
Partly sunny. Highs in the upper 70s. Light and variable winds, becoming southwest around 10 mph in the afternoon.
THURSDAY NIGHT
Partly cloudy. Lows in the lower 60s.
FRIDAY
Partly sunny. Highs in the upper 70s.
FRIDAY NIGHT
Mostly cloudy with a 40 percent chance of showers. Lows in the mid 50s.
SATURDAY
Partly sunny. Highs in the upper 60s.
SATURDAY NIGHT
Partly cloudy. Lows in the mid 40s.
SUNDAY
Partly sunny in the morning, then becoming mostly cloudy. A 50 percent chance of showers. Highs in the lower 60s.
SUNDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 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  9/28/2026
Tuesday
29 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 54° 52° Mostly Cloudy 40%
RAIN
.1–.25 in
0% Thunder
( 5% severe)
N   8 100% 54°
Low 53° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 54° 52° Mostly Cloudy NNW   8 100% 54°
High 69° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 55° 53° Mostly Cloudy 5%

0% Thunder
( 1% severe)
NNW   7 100% 55°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 63° 63° Mostly Cloudy NNW   8 78% 56°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 67° 67° Mostly Cloudy 5%

0% Thunder
( 0% severe)
NNW   7 68% 56°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 66° 66° Mostly Cloudy N   3 73% 57°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 61° 62° Mostly Cloudy 5%

0% Thunder
( 0% severe)
  CALM 87% 57°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 58° 59° Mostly Cloudy   CALM 96% 57°
Wednesday
30 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 56° 56° Mostly Cloudy 2%

0% Thunder
( 0% severe)
  CALM 100% 56°
Low 55° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 55° 55° Mostly Cloudy   CALM 100% 55°
High 71° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 56° 56° Mostly Cloudy 0%

0% Thunder
( 1% severe)
  CALM 96% 55°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 66° 66° Mostly Cloudy   CALM 73% 57°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 69° 69° Mostly Cloudy 0%

0% Thunder
( 0% severe)
S   5 63% 56°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 66° 66° Mostly Cloudy S   7 73% 57°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 59° 59° Mostly Cloudy 0%

0% Thunder
( 0% severe)
S   5 90% 56°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 57° 57° Mostly Cloudy SSW   3 100% 57°

PORTSMOUTH, NH extended weather forecast

Thursday
1 OCT 2026
Friday
2 OCT 2026
Saturday
3 OCT 2026
Sunday
4 OCT 2026
Monday
5 OCT 2026
Low 54° Low 59° Low 59° Low 47° Low 47°
High 79° High 83° High 68° High 61° High 64°
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
12% Rain
Partly Cloudy
17% Rain
Partly Cloudy
27% Rain
Mostly Cloudy
68% Rain
Mostly Cloudy
48% 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