PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

9:55 AM EDT JUN 29, 2026
Few Clouds
77°F
Feels Like: 79°F
Dewpoint: 63°F
Rel. Hum.: 62%
Visibility: 10 miles
Wind: Calm
Pressure: 30.07 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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TODAY
Mostly sunny. Highs in the lower 80s. Light and variable winds.
TONIGHT
Mostly clear. Lows in the lower 60s. Light and variable winds.
TUESDAY
Partly sunny. Warm with highs in the upper 80s. Light and variable winds. Heat index values in the lower 90s in the afternoon.
TUESDAY NIGHT
Showers likely. Humid with lows in the upper 60s. Light and variable winds. Chance of rain 70 percent.
WEDNESDAY
Partly sunny. A chance of showers in the morning. Hot with highs in the mid 90s. Light and variable winds. Chance of rain 50 percent. Heat index values up to 110 in the afternoon.
WEDNESDAY NIGHT
Partly cloudy with a chance of showers. Lows in the lower 70s. Chance of rain 40 percent.
THURSDAY
Mostly sunny. Hot with highs around 100.
THURSDAY NIGHT
Mostly clear. Lows in the mid 70s.
FRIDAY
Partly sunny. Hot with highs in the mid 90s.
FRIDAY NIGHT
Partly cloudy. Lows around 70.
INDEPENDENCE DAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Warm with highs in the upper 80s. Chance of rain 40 percent.
SATURDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the mid 60s. Chance of rain 40 percent.
SUNDAY
Partly sunny. A chance of showers in the afternoon. Highs in the lower 80s. Chance of rain 30 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  6/28/2026
Monday
29 JUN 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 63° 64° Mostly Cloudy 0%

0% Thunder
( 1% severe)
  CALM 97% 62°
Low 59° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 60° 61° Partly Cloudy NNW   2 96% 59°
High 82° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 68° 68° Partly Cloudy 0%

0% Thunder
( 1% severe)
  CALM 78% 61°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 79° 80° Clear E   3 54% 61°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 79° 80° Partly Cloudy 0%

0% Thunder
( 4% severe)
ESE   7 52% 60°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 78° 80° Partly Cloudy SE   7 56% 61°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 71° 71° Partly Cloudy 0%

0% Thunder
( 2% severe)
SSE   5 68% 60°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 65° 65° Partly Cloudy S   3 81% 59°
Tuesday
30 JUN 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 64° 66° Partly Cloudy 2%

0% Thunder
( 1% severe)
  CALM 84% 59°
Low 62° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 62° 63° Partly Cloudy   CALM 90% 59°
High 89° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 70° 70° Partly Cloudy 2%

0% Thunder
( 2% severe)
  CALM 76% 62°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 83° 84° Partly Cloudy S   5 53% 64°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 85° 87° Mostly Cloudy 17%
RAIN
<.01 in
0% Thunder
( 12% severe)
S   8 51% 65°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 84° 88° Mostly Cloudy S   9 61% 69°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 79° 81° Mostly Cloudy 53%
RAIN
***
0% Thunder
( 24% severe)
SSW   7 69% 68°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 74° 74° Mostly Cloudy SW   8 79% 67°

PORTSMOUTH, NH extended weather forecast

Wednesday
1 JUL 2026
Thursday
2 JUL 2026
Friday
3 JUL 2026
Saturday
4 JUL 2026
Sunday
5 JUL 2026
Low 70° Low 74° Low 74° Low 70° Low 72°
High 95° High 97° High 95° High 92° 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
29% Rain
Partly Cloudy
18% Rain
Partly Cloudy
15% Rain
Partly Cloudy
13% Rain
Partly Cloudy
35% Rain
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