PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

8:55 AM EDT AUG 15, 2026
Scattered Clouds
70°F
Feels Like: 70°F
Dewpoint: 55°F
Rel. Hum.: 59%
Visibility: 10 miles
Wind: NW at 6 mph
Pressure: 30.13 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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Snow Depth pages
TODAY
Mostly sunny. Highs in the upper 70s. Light and variable winds.
TONIGHT
Mostly clear. Lows in the mid 50s. Light and variable winds.
SUNDAY
Mostly sunny. Highs in the upper 70s. Light and variable winds, becoming southeast around 10 mph with gusts up to 20 mph in the afternoon.
SUNDAY NIGHT
Partly cloudy with a chance of showers in the evening, then cloudy with showers after midnight. Lows in the lower 60s. South winds around 10 mph. Chance of rain 90 percent.
MONDAY
Showers with highs in the mid 70s. Southeast winds around 10 mph with gusts up to 20 mph. Chance of rain 80 percent.
MONDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 30 percent.
TUESDAY
Mostly sunny. Highs around 80.
TUESDAY NIGHT
Mostly clear. Lows in the lower 60s.
WEDNESDAY
Mostly sunny. Highs in the lower 80s.
WEDNESDAY NIGHT
Mostly clear in the evening, then partly cloudy with a chance of showers after midnight. Lows in the mid 60s. Chance of rain 30 percent.
THURSDAY
Partly sunny with a 40 percent chance of showers. Highs in the mid 80s.
THURSDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows around 60. Chance of rain 30 percent.
FRIDAY
Partly sunny. 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 PM EDT  8/14/2026
Saturday
15 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 60° 61° Clear 0%

0% Thunder
( 0% severe)
NW   3 81% 54°
Low 56° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 57° 57° Clear WNW   5 93% 55°
High 82° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 64° 65° Clear 0%

0% Thunder
( 0% severe)
NW   5 75% 56°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 77° 78° Partly Cloudy NNW   3 42% 52°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 80° 80° Partly Cloudy 1%

0% Thunder
( 1% severe)
SE   6 36% 51°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 78° 79° Partly Cloudy SSE   8 37% 50°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 70° 70° Clear 0%

0% Thunder
( 1% severe)
S   5 57% 54°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 64° 65° Clear WNW   3 73% 55°
Sunday
16 AUG 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 60° 61° Partly Cloudy 0%

0% Thunder
( 0% severe)
N   2 81% 54°
Low 56° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 56° 56° Partly Cloudy NNW   1 93% 54°
High 81° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 63° 64° Partly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 75% 55°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 76° 78° Partly Cloudy SE   5 50% 56°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 78° 79° Partly Cloudy 3%

0% Thunder
( 0% severe)
SSE   10 48% 57°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 77° 79° Partly Cloudy SSE   13 50% 57°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 72° 72° Mostly Cloudy 50%
RAIN
***
0% Thunder
( 5% severe)
S   10 66% 60°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 68° 68° Mostly Cloudy S   9 81% 62°

PORTSMOUTH, NH extended weather forecast

Monday
17 AUG 2026
Tuesday
18 AUG 2026
Wednesday
19 AUG 2026
Thursday
20 AUG 2026
Friday
21 AUG 2026
Low 66° Low 64° Low 61° Low 64° Low 59°
High 74° High 77° High 83° High 77° High 75°
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
85% Rain
Overcast
47% Rain
Mostly Cloudy
28% Rain
Mostly Cloudy
55% Rain
Partly Cloudy
28% Rain
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