PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

11:55 PM EDT SEP 13, 2026
Fog
66°F
Feels Like: 66°F
Dewpoint: 64°F
Rel. Hum.: 93%
Visibility: 1/8 miles
Wind: WSW at 5 mph
Pressure: 29.79 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly cloudy with a 20 percent chance of showers. Patchy fog. Humid with lows around 60. Light and variable winds.
MONDAY
Partly sunny with a slight chance of showers in the morning, then sunny in the afternoon. Highs in the lower 70s. Northwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 20 percent.
MONDAY NIGHT
Clear. Lows in the upper 40s. Northwest winds around 10 mph with gusts up to 20 mph in the evening, becoming light and variable.
TUESDAY
Sunny. Highs in the upper 60s. Light and variable winds.
TUESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 50s.
WEDNESDAY
Mostly sunny. Highs in the mid 70s.
WEDNESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s.
THURSDAY
Partly sunny. Highs in the lower 70s.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A 50 percent chance of showers. Lows in the upper 50s.
FRIDAY
Partly sunny. Highs in the mid 70s.
FRIDAY NIGHT
Partly cloudy. Lows in the mid 50s.
SATURDAY
Partly sunny. Highs in the upper 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  9/13/2026
Monday
14 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 64° 65° Mostly Cloudy 14%
RAIN
<.01 in
0% Thunder
( 1% severe)
WSW   5 100% 64°
Low 61° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 64° 64° Mostly Cloudy W   8 97% 63°
High 73° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 62° 61° Partly Cloudy 1%

0% Thunder
( 0% severe)
WNW   9 90% 59°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 68° 68° Clear NW   15 54% 51°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 71° 71° Clear 0%

0% Thunder
( 0% severe)
NW   16 39% 45°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 69° 69° Clear NW   14 39% 43°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 61° 60° Clear 0%

0% Thunder
( 0% severe)
NW   8 56% 45°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 55° 54° Clear NNW   5 74% 47°
Tuesday
15 SEP 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 52° 52° Clear 0%

0% Thunder
( 0% severe)
N   3 83% 47°
Low 49° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 50° 48° Clear NNW   5 86% 46°
High 68° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 53° 53° Clear 0%

0% Thunder
( 0% severe)
NA   3 74% 45°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 63° 64° Clear E   5 52% 45°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 66° 66° Partly Cloudy 0%

0% Thunder
( 0% severe)
SE   7 43% 43°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 64° 64° Partly Cloudy SSE   8 46% 43°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 59° 58° Partly Cloudy 0%

0% Thunder
( 0% severe)
SSE   7 69% 49°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 56° 55° Partly Cloudy S   6 90% 53°

PORTSMOUTH, NH extended weather forecast

BAD DAY
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Low 48° Low 51° Low 57° Low 53° Low 50°
High 64° High 76° High 69° High 67° 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
1% Rain
Mostly Cloudy
9% Rain
Overcast
65% Rain
Mostly Cloudy
33% Rain
Partly Cloudy
26% Rain
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