PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

8:55 AM EDT AUG 25, 2026
Few Clouds
68°F
Feels Like: 68°F
Dewpoint: 59°F
Rel. Hum.: 73%
Visibility: 10 miles
Wind: WSW at 5 mph
Pressure: 29.91 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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TODAY
Mostly sunny. Highs in the upper 70s. Light and variable winds.
TONIGHT
Mostly clear. Lows in the upper 50s. Light and variable winds.
WEDNESDAY
Sunny in the morning, then becoming partly sunny. Highs in the lower 80s. Light and variable winds, becoming southeast around 10 mph in the afternoon.
WEDNESDAY NIGHT
Partly cloudy. Lows in the lower 60s. Light and variable winds.
THURSDAY
Partly sunny. Humid with highs in the lower 80s. South winds around 10 mph.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 50 percent.
FRIDAY
A chance of thunderstorms in the morning. Partly sunny with a chance of showers. Highs in the lower 80s. Chance of rain 50 percent.
FRIDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 50 percent.
SATURDAY
Partly sunny. Highs in the upper 70s.
SATURDAY NIGHT
Mostly clear. Lows in the upper 50s.
SUNDAY
Mostly sunny. Highs in the lower 80s.
SUNDAY NIGHT
Partly cloudy. Lows in the lower 60s.
MONDAY
Partly sunny. Highs in the mid 80s.

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  8/24/2026
Tuesday
25 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 62° 63° Partly Cloudy 1%

0% Thunder
( 1% severe)
WSW   1 90% 59°
Low 58° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 59° 60° Partly Cloudy W   2 96% 58°
High 82° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 64° 65° Partly Cloudy 2%

0% Thunder
( 3% severe)
W   5 78% 57°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 75° 75° Partly Cloudy WSW   7 54% 57°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 79° 80° Partly Cloudy 5%

0% Thunder
( 12% severe)
WSW   8 49% 58°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 78° 79° Partly Cloudy W   8 48% 57°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 71° 71° Partly Cloudy 2%

0% Thunder
( 3% severe)
W   6 63% 58°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 65° 65° Clear WNW   6 81% 59°
Wednesday
26 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 62° 62° Clear 0%

0% Thunder
( 0% severe)
W   5 90% 59°
Low 59° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 59° 59° Clear W   5 96% 58°
High 83° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 65° 65° Clear 0%

0% Thunder
( 0% severe)
WNW   5 78% 58°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 77° 79° Clear   CALM 54% 59°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 80° 81° Partly Cloudy 0%

0% Thunder
( 1% severe)
SSE   8 47% 58°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 77° 79° Partly Cloudy SSE   9 54% 59°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 71° 71° Mostly Cloudy 0%

0% Thunder
( 1% severe)
SSE   7 68% 60°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 66° 66° Partly Cloudy S   3 84% 61°

PORTSMOUTH, NH extended weather forecast

Thursday
27 AUG 2026
Friday
28 AUG 2026
Saturday
29 AUG 2026
Sunday
30 AUG 2026
Monday
31 AUG 2026
Low 61° Low 66° Low 61° Low 54° Low 60°
High 82° High 77° High 74° High 77° 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
Mostly Cloudy
31% Rain
Overcast
76% Rain
Partly Cloudy
25% Rain
Clear
14% Rain
Mostly Cloudy
22% Rain
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