PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

3:55 PM EDT AUG 28, 2026
Scattered Clouds
86°F
Feels Like: 88°F
Dewpoint: 66°F
Rel. Hum.: 51%
Visibility: 10 miles
Wind: S at 6 mph
Pressure: 29.93 inches
Last 72 hours

Local Area Snow Depth

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
THIS AFTERNOON
Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Light and variable winds. Chance of rain 30 percent.
TONIGHT
Partly cloudy. A slight chance of showers and thunderstorms in the evening. Patchy fog. Lows in the mid 50s. Light and variable winds. Chance of rain 20 percent.
SATURDAY
Patchy fog in the morning. Sunny. Highs in the upper 70s. Light and variable winds.
SATURDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s. Light and variable winds.
SUNDAY
Partly sunny. Warm with highs in the mid 80s. Light and variable winds, becoming southwest around 10 mph in the afternoon.
SUNDAY NIGHT
Partly cloudy. Lows in the mid 60s.
MONDAY
Partly sunny. Highs in the upper 70s.
MONDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows around 60.
TUESDAY
Partly sunny. A chance of showers in the afternoon. Highs in the mid 70s. Chance of rain 40 percent.
TUESDAY NIGHT
A chance of showers in the evening, then showers likely after midnight. Lows in the lower 60s. Chance of rain 60 percent.
WEDNESDAY
Showers likely, mainly in the morning. Highs in the upper 70s. Chance of rain 60 percent.
WEDNESDAY NIGHT
Mostly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 50 percent.
THURSDAY
Mostly cloudy in the morning, then becoming partly sunny. A 50 percent chance of showers. Highs in the upper 70s.

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 AM EDT  8/28/2026
Friday
28 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 80° 83° Mostly Cloudy 32%
RAIN
.1–.25 in
0% Thunder
( 34% severe)
SW   6 69% 69°
High 81° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 79° 82° Mostly Cloudy S   7 72% 69°
Mostly Cloudy

Chance of Rain

PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 72° 72° Partly Cloudy 1%

0% Thunder
( 4% severe)
W   3 87% 68°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 67° 67° Partly Cloudy NW   7 90% 64°
Saturday
29 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 63° 63° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   6 87% 59°
Low 57° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 58° 58° Partly Cloudy NW   5 90% 55°
High 79° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 61° 61° Clear 0%

0% Thunder
( 0% severe)
NNW   5 78% 54°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 73° 73° Clear   CALM 46% 51°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 76° 78° Clear 0%

0% Thunder
( 0% severe)
SSE   7 40% 50°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 74° 74° Clear S   9 43% 50°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 67° 67° Clear 0%

0% Thunder
( 0% severe)
S   6 63% 54°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 62° 63° Partly Cloudy SW   3 81% 56°
Sunday
30 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 60° 61° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   3 84% 55°
Low 58° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 59° 59° Partly Cloudy WSW   5 80% 53°
High 86° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 64° 64° Partly Cloudy 0%

0% Thunder
( 1% severe)
WSW   6 73% 55°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 78° 79° Partly Cloudy SW   8 47% 56°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 84° 83° Mostly Cloudy 0%

0% Thunder
( 4% severe)
SW   10 36% 54°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 83° 82° Mostly Cloudy WSW   10 38% 55°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 75° 75° Mostly Cloudy     WSW   8 55% 58°

PORTSMOUTH, NH extended weather forecast

Monday
31 AUG 2026
Tuesday
1 SEP 2026
Wednesday
2 SEP 2026
Thursday
3 SEP 2026
Friday
4 SEP 2026
Low 63° Low 59° Low 58° Low 61° Low 59°
High 75° High 69° High 73° High 82° High 78°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
13% Rain
Overcast
62% Rain
Overcast
45% Rain
Mostly Cloudy
43% Rain
Partly Cloudy
23% Rain
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