PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

10:55 PM EDT MAY 21, 2026
Overcast
57°F
Feels Like: 54°F
Dewpoint: 34°F
Rel. Hum.: 42%
Visibility: 10 miles
Wind: NNW at 12 mph
Pressure: 30.27 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Partly sunny. Highs in the lower 60s. Light and variable winds, becoming southeast around 10 mph this afternoon.
TONIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 40s. Light and variable winds.
SATURDAY
Cloudy. Highs in the lower 60s. Light and variable winds.
SATURDAY NIGHT
Cloudy. A chance of showers after midnight. Lows in the mid 40s. Light and variable winds. Chance of rain 30 percent.
SUNDAY
Showers. Highs in the mid 50s. East winds around 10 mph. Chance of rain 90 percent.
SUNDAY NIGHT
Showers. Lows in the upper 40s. Chance of rain 90 percent.
MEMORIAL DAY
Showers likely, mainly in the morning. Highs in the upper 60s. Chance of rain 70 percent.
MONDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 50s.
TUESDAY
Partly sunny. Highs in the mid 70s.
TUESDAY NIGHT
Partly cloudy. Lows in the mid 50s.
WEDNESDAY
Partly sunny. Highs in the upper 70s.
WEDNESDAY NIGHT
Partly cloudy. Lows in the lower 50s.
THURSDAY
Partly sunny. Highs in the upper 60s.

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  5/21/2026
Friday
22 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 49° 47° Partly Cloudy 0%

0% Thunder
( 0% severe)
N   5 56% 34°
Low 44° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 45° 43° Partly Cloudy N   5 63% 33°
High 65° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 52° 50° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNE   6 48% 33°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 60° 60° Partly Cloudy NE   5 33% 31°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 62° 62° Partly Cloudy 0%

0% Thunder
( 0% severe)
SE   7 34% 33°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 60° 59° Partly Cloudy SSE   9 37% 34°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 55° 54° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   5 49% 36°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 50° 50° Mostly Cloudy   CALM 58% 36°
Saturday
23 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 48° 47° Mostly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 63% 36°
Low 46° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 46° 45° Mostly Cloudy   CALM 71% 37°
High 63° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 54° 54° Mostly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 61% 41°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 61° 61° Mostly Cloudy E   6 48% 41°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 61° 60° Mostly Cloudy 1%

0% Thunder
( 0% severe)
ESE   8 46% 40°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 59° 58° Mostly Cloudy ESE   7 49% 40°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 54° 54° Mostly Cloudy 16%
RAIN
<.01 in
0% Thunder
( 0% severe)
SE   2 64% 42°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 51° 51° Mostly Cloudy   CALM 74% 43°

PORTSMOUTH, NH extended weather forecast

Sunday
24 MAY 2026
Monday
25 MAY 2026
Tuesday
26 MAY 2026
Wednesday
27 MAY 2026
Thursday
28 MAY 2026
Low 46° Low 48° Low 53° Low 56° Low 51°
High 57° High 63° High 74° High 73° High 66°
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
36% Rain
Overcast
79% Rain
Mostly Cloudy
16% Rain
Partly Cloudy
27% Rain
Partly Cloudy
17% Rain
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