PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

6:55 PM EDT AUG 13, 2026
Few Clouds
81°F
Feels Like: 81°F
Dewpoint: 57°F
Rel. Hum.: 44%
Visibility: 10 miles
Wind: W at 6 mph
Pressure: 29.80 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear. A slight chance of showers and thunderstorms in the evening. Some thunderstorms may produce gusty winds and small hail in the evening. Lows in the lower 60s. Light and variable winds. Chance of rain 20 percent.
FRIDAY
Mostly sunny. Highs in the lower 80s. Northwest winds around 10 mph.
FRIDAY NIGHT
Mostly clear. Lows in the upper 50s. Northwest winds around 10 mph in the evening, becoming light and variable.
SATURDAY
Mostly sunny. Highs around 80. Light and variable winds.
SATURDAY NIGHT
Mostly clear. Lows in the upper 50s.
SUNDAY
Partly sunny. Highs in the upper 70s.
SUNDAY NIGHT
Showers likely. Lows in the lower 60s. Chance of rain 70 percent.
MONDAY
Showers likely in the morning, then partly sunny in the afternoon. Highs in the upper 70s. Chance of rain 60 percent.
MONDAY NIGHT
Partly cloudy in the evening, then clearing. Lows in the upper 50s.
TUESDAY
Mostly sunny. Highs in the upper 70s.
TUESDAY NIGHT
Mostly clear. Lows in the lower 60s.
WEDNESDAY
Partly sunny. Highs around 80.

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  8/13/2026
Thursday
13 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 79° 81° Partly Cloudy 17%
RAIN
<.01 in
0% Thunder
( 25% severe)
W   7 60% 64°
High 80° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 78° 80° Clear WNW   7 62% 64°
Clear



PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 72° 72° Clear 1%

0% Thunder
( 8% severe)
WNW   6 71% 62°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 67° 67° Clear NW   7 81% 61°
Friday
14 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 64° 64° Clear 0%

0% Thunder
( 0% severe)
WNW   7 87% 60°
Low 61° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 62° 61° Clear W   8 90% 59°
High 83° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 66° 66° Clear 1%

0% Thunder
( 0% severe)
WNW   8 78% 59°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 77° 79° Clear NW   12 47% 55°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 81° 80° Partly Cloudy 1%

0% Thunder
( 6% severe)
WNW   13 38% 53°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 80° 80° Clear NW   12 35% 50°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 72° 72° Clear 2%

0% Thunder
( 2% severe)
NW   7 49% 52°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 65° 65° Clear NNW   6 65% 53°
Saturday
15 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 60° 60° Partly Cloudy 1%

0% Thunder
( 0% severe)
NW   5 81% 54°
Low 57° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 57° 56° Clear NW   6 90% 54°
High 82° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 64° 64° Clear 0%

0% Thunder
( 0% severe)
NNW   6 73% 55°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 76° 78° Clear NNW   5 45% 53°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 80° 80° Clear 0%

0% Thunder
( 1% severe)
NE   5 38% 52°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 78° 79° Clear SSE   7 40% 52°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 70° 70° Partly Cloudy     S   6 57% 54°

PORTSMOUTH, NH extended weather forecast

Sunday
16 AUG 2026
Monday
17 AUG 2026
Tuesday
18 AUG 2026
Wednesday
19 AUG 2026
Thursday
20 AUG 2026
Low 59° Low 63° Low 61° Low 61° Low 62°
High 77° High 78° High 78° High 80° High 79°
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
Mostly Cloudy
46% Rain
Overcast
70% Rain
Partly Cloudy
30% Rain
Overcast
32% Rain
Partly Cloudy
33% Rain
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