PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

1:55 AM EDT AUG 5, 2026
Scattered Clouds
64°F
Feels Like: 64°F
Dewpoint: 63°F
Rel. Hum.: 97%
Visibility: 10 miles
Wind: Calm
Pressure: 30.06 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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TODAY
Partly sunny. Warm with highs in the mid 80s. Light and variable winds.
TONIGHT
Partly cloudy in the evening, then clearing. Lows in the upper 60s. Light and variable winds.
THURSDAY
Mostly sunny. A slight chance of showers in the afternoon. Warm with highs in the upper 80s. Light and variable winds. Chance of rain 20 percent. Heat index values in the mid 90s in the afternoon.
THURSDAY NIGHT
Partly cloudy in the evening, then clearing. Humid with lows in the lower 70s. Light and variable winds. Heat index values in the lower 90s early in the evening.
FRIDAY
Mostly sunny. A chance of showers in the afternoon. Warm with highs in the upper 80s. Light and variable winds. Chance of rain 40 percent. Heat index values in the mid 90s.
FRIDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows in the upper 60s. Chance of rain 40 percent.
SATURDAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Warm with highs in the mid 80s. Chance of rain 50 percent.
SATURDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 60s. Chance of rain 50 percent.
SUNDAY
Mostly sunny. Warm with highs in the upper 80s.
SUNDAY NIGHT
Mostly clear. Lows in the upper 60s.
MONDAY
Mostly sunny. Warm with highs in the upper 80s.
MONDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the upper 60s. Chance of rain 30 percent.
TUESDAY
Partly sunny with a chance of showers. Highs in the mid 80s. Chance of rain 40 percent.

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/ 4/2026
Wednesday
5 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 65° 65° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   3 87% 61°
Low 62° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 63° 64° Mostly Cloudy   CALM 90% 60°
High 86° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 69° 69° Mostly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 78% 62°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 82° 83° Partly Cloudy SW   3 53% 63°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 84° 84° Mostly Cloudy 0%

0% Thunder
( 1% severe)
SSW   7 46% 61°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 83° 84° Partly Cloudy S   8 49% 62°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 76° 78° Partly Cloudy 2%

0% Thunder
( 1% severe)
S   7 64% 63°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 72° 72° Partly Cloudy SW   6 76% 64°
Thursday
6 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 70° 70° Partly Cloudy 3%

0% Thunder
( 0% severe)
WSW   5 84% 65°
Low 68° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 69° 69° Partly Cloudy WSW   5 90% 66°
High 89° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 73° 73° Clear 3%

0% Thunder
( 3% severe)
WSW   3 84% 68°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 84° 88° Partly Cloudy SSW   3 61% 69°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 87° 92° Partly Cloudy 16%
RAIN
<.01 in
0% Thunder
( 24% severe)
SSE   7 57% 70°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 85° 91° Partly Cloudy SSE   8 65% 72°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 79° 82° Partly Cloudy 6%

0% Thunder
( 11% severe)
S   5 79% 72°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 75° 75° Partly Cloudy SW   5 90% 72°

PORTSMOUTH, NH extended weather forecast

Friday
7 AUG 2026
Saturday
8 AUG 2026
Sunday
9 AUG 2026
Monday
10 AUG 2026
Tuesday
11 AUG 2026
Low 71° Low 70° Low 67° Low 68° Low 68°
High 88° High 87° High 89° High 88° High 84°
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
Overcast
52% Rain
Overcast
64% Rain
Partly Cloudy
40% Rain
Partly Cloudy
23% Rain
Partly Cloudy
33% Rain
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