PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

Enter ZIP code or City, State   
    


PORTSMOUTH, NH
Current Weather

2:55 PM EDT MAY 20, 2026
Broken Clouds
90°F
Feels Like: 91°F
Dewpoint: 64°F
Rel. Hum.: 42%
Visibility: 10 miles
Wind: WSW at 18 mph, gusts to 23
Pressure: 29.78 inches
Last 72 hours

Local Area Snow Depth

New Hampshire Current Weather

New Hampshire MOS Forecast Weather


Regional Weather Maps


(Automated weather data from NWS/FAA)
10-Day model forecast maps
2025 Hurricanes

PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
THIS AFTERNOON
Partly sunny. Warm with highs in the upper 80s. West winds 15 to 20 mph with gusts up to 30 mph.
TONIGHT
Partly cloudy with scattered showers in the evening, then mostly cloudy with isolated showers after midnight. Less humid with lows in the lower 50s. Northwest winds 10 to 15 mph with gusts up to 25 mph in the evening, becoming light and variable. Chance of rain 30 percent.
THURSDAY
Mostly cloudy in the morning, then becoming partly sunny. Cooler with highs in the mid 60s. Light and variable winds.
THURSDAY NIGHT
Partly cloudy in the evening, then clearing. Lows in the lower 40s. Light and variable winds.
FRIDAY
Mostly sunny. Highs in the mid 60s. Light and variable winds, becoming southeast around 10 mph in the afternoon.
FRIDAY NIGHT
Partly cloudy. Lows in the upper 40s.
SATURDAY
Mostly cloudy. Highs in the lower 60s.
SATURDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 40s.
SUNDAY
Showers likely. Highs in the mid 50s. Chance of rain 60 percent.
SUNDAY NIGHT
Showers likely. Lows in the mid 40s. Chance of rain 60 percent.
MEMORIAL DAY
Cloudy with a 50 percent chance of showers. Highs in the mid 60s.
MONDAY NIGHT
Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Lows around 50. Chance of rain 30 percent.
TUESDAY
Partly sunny with a 30 percent chance of showers. Highs in the lower 70s.

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 AM EDT  5/20/2026
Wednesday
20 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 87° 88° Partly Cloudy 13%
RAIN
<.01 in
0% Thunder
( 12% severe)
W   14 46% 64°
High 88° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 84° 85° Partly Cloudy W   13 49% 63°
Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 75° 75° Mostly Cloudy 3%

0% Thunder
( 1% severe)
WNW   8 50% 55°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 68° 68° Mostly Cloudy NW   8 49% 48°
Thursday
21 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 60° 59° Mostly Cloudy 2%

0% Thunder
( 0% severe)
NW   7 53% 43°
Low 55° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 56° 54° Mostly Cloudy NNW   7 55% 40°
High 65° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 56° 55° Mostly Cloudy 1%

0% Thunder
( 0% severe)
N   5 53% 39°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 60° 60° Mostly Cloudy SSE   5 42% 37°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 62° 62° Mostly Cloudy 0%

0% Thunder
( 0% severe)
S   6 38% 36°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 63° 63° Partly Cloudy SW   7 36% 36°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 57° 57° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   5 47% 37°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 51° 50° Mostly Cloudy N   3 59% 37°
Friday
22 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 47° 46° Partly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 65% 36°
Low 45° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 45° 44° Partly Cloudy NNW   2 68% 35°
High 65° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 53° 53° Clear 0%

0% Thunder
( 0% severe)
  CALM 52% 36°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 61° 62° Clear ESE   2 35% 33°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 63° 63° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   8 34% 34°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 62° 61° Partly Cloudy S   9 38% 36°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 56° 55° Partly Cloudy     S   6 51% 38°

PORTSMOUTH, NH extended weather forecast

Saturday
23 MAY 2026
Sunday
24 MAY 2026
Monday
25 MAY 2026
Tuesday
26 MAY 2026
Wednesday
27 MAY 2026
Low 48° Low 44° Low 46° Low 51° Low 57°
High 64° High 59° High 62° High 73° High 78°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
3% Rain
Mostly Cloudy
11% Rain
Overcast
51% Rain
Mostly Cloudy
32% Rain
Partly Cloudy
23% Rain
WEATHER 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 © 2024 WeatherStreet.com
Put our free WeatherStreet weather lookup on your web page.
Terms & Conditions