PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

3:55 AM EDT AUG 9, 2026
Clear
72°F
Feels Like: 72°F
Dewpoint: 68°F
Rel. Hum.: 87%
Visibility: 10 miles
Wind: W at 3 mph
Pressure: 29.86 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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REST OF TONIGHT
Mostly clear. Lows in the upper 60s. Light and variable winds.
SUNDAY
Mostly sunny. Warm with highs in the upper 80s. Light and variable winds, becoming west around 10 mph in the afternoon. Heat index values in the mid 90s.
SUNDAY NIGHT
Mostly clear. Lows in the mid 60s. Light and variable winds.
MONDAY
Partly sunny. Humid with highs in the lower 80s. Light and variable winds, becoming southeast around 10 mph in the afternoon.
MONDAY NIGHT
Partly cloudy with a chance of showers in the evening, then mostly clear after midnight. Humid with lows in the mid 60s. Light and variable winds. Chance of rain 30 percent.
TUESDAY
Mostly sunny. Warm with highs in the upper 80s.
TUESDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 60s.
WEDNESDAY
Partly sunny. Highs in the lower 80s.
WEDNESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s.
THURSDAY
Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent.
THURSDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms in the evening. Lows around 60. Chance of rain 50 percent.
FRIDAY
Mostly sunny. Highs in the lower 80s.
FRIDAY NIGHT
Mostly clear. Lows in the upper 50s.

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/ 8/2026
Sunday
9 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 70° 70° Partly Cloudy 0%

0% Thunder
( 1% severe)
WSW   5 97% 69°
Low 68° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 69° 69° Partly Cloudy WSW   6 97% 68°
High 91° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 73° 73° Partly Cloudy 1%

0% Thunder
( 2% severe)
W   7 87% 69°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 85° 89° Clear W   9 59% 69°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 90° 92° Clear 5%

0% Thunder
( 7% severe)
W   10 45% 66°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 90° 91° Clear W   10 41% 63°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 79° 80° Clear 0%

0% Thunder
( 2% severe)
W   7 54% 61°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 73° 73° Partly Cloudy W   5 66% 61°
Monday
10 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 68° 68° Clear 1%

0% Thunder
( 0% severe)
W   3 78% 61°
Low 66° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 66° 66° Partly Cloudy   CALM 84% 61°
High 87° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 72° 72° Partly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 73% 63°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 82° 83° Clear S   6 51% 62°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 84° 85° Partly Cloudy 7%

0% Thunder
( 6% severe)
SSE   10 49% 63°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 82° 84° Partly Cloudy SSE   10 55% 64°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 76° 78° Mostly Cloudy 17%
RAIN
<.01 in
0% Thunder
( 14% severe)
SSW   6 69% 65°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 72° 72° Mostly Cloudy WSW   6 81% 66°

PORTSMOUTH, NH extended weather forecast

Tuesday
11 AUG 2026
Wednesday
12 AUG 2026
Thursday
13 AUG 2026
Friday
14 AUG 2026
Saturday
15 AUG 2026
Low 65° Low 62° Low 63° Low 56° Low 56°
High 87° High 80° High 78° High 73° High 77°
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
Mostly Cloudy
38% Rain
Mostly Cloudy
13% Rain
Partly Cloudy
33% Rain
Partly Cloudy
26% Rain
Partly Cloudy
20% Rain
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