PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

12:55 AM EDT AUG 4, 2026
Clear
68°F
Feels Like: 68°F
Dewpoint: 61°F
Rel. Hum.: 78%
Visibility: 10 miles
Wind: W at 10 mph
Pressure: 29.89 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy with a chance of showers and thunderstorms this evening, then mostly clear after midnight. Lows in the lower 60s. West winds around 10 mph with gusts up to 20 mph. Chance of rain 50 percent.
TUESDAY
Sunny, warm with highs in the mid 80s. Light and variable winds, becoming west around 10 mph in the afternoon.
TUESDAY NIGHT
Mostly clear. Lows in the lower 60s. Light and variable winds.
WEDNESDAY
Partly sunny. Highs in the lower 80s. Light and variable winds.
WEDNESDAY NIGHT
Partly cloudy. Humid with lows in the mid 60s. Light and variable winds.
THURSDAY
Mostly sunny. Warm with highs in the upper 80s.
THURSDAY NIGHT
Partly cloudy. Lows around 70.
FRIDAY
Partly sunny. Warm with highs in the upper 80s.
FRIDAY NIGHT
Partly cloudy. Lows in the upper 60s.
SATURDAY
Partly sunny. A chance of showers in the afternoon. Warm with highs in the mid 80s. Chance of rain 40 percent.
SATURDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows in the upper 60s. Chance of rain 30 percent.
SUNDAY
Mostly sunny. Warm with highs in the upper 80s.
SUNDAY NIGHT
Mostly clear. Lows 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  8/ 3/2026
Tuesday
4 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 64° 64° Clear 0%

0% Thunder
( 0% severe)
W   9 84% 59°
Low 61° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 62° 61° Clear W   8 87% 58°
High 86° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 68° 68° Clear 0%

0% Thunder
( 0% severe)
W   8 73% 59°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 80° 81° Clear W   9 47% 58°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 84° 83° Clear 0%

0% Thunder
( 1% severe)
WSW   9 38% 56°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 85° 84° Clear WSW   8 37% 56°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 75° 75° Clear 0%

0% Thunder
( 1% severe)
SSW   6 60% 60°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 68° 68° Partly Cloudy SW   5 76% 60°
Wednesday
5 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 64° 65° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   3 87% 60°
Low 62° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 62° 63° Partly Cloudy   CALM 93% 60°
High 84° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 68° 68° Mostly Cloudy 4%

0% Thunder
( 0% severe)
  CALM 81% 62°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 80° 81° Mostly Cloudy S   5 56% 63°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 82° 83° Mostly Cloudy 4%

0% Thunder
( 1% severe)
S   8 53% 63°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 81° 83° Mostly Cloudy S   8 58% 65°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 75° 75° Partly Cloudy 3%

0% Thunder
( 8% severe)
S   6 71% 65°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 71° 71° Mostly Cloudy SW   6 84% 66°

PORTSMOUTH, NH extended weather forecast

BAD DAY
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Low 63° Low 66° Low 71° Low 70° Low 67°
High 82° High 91° High 91° High 86° High 87°
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
8% Rain
Partly Cloudy
19% Rain
Mostly Cloudy
36% Rain
Mostly Cloudy
38% Rain
Partly Cloudy
27% Rain
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