PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

1:55 PM EDT MAY 21, 2026
Broken Clouds
66°F
Feels Like: 66°F
Dewpoint: 34°F
Rel. Hum.: 30%
Visibility: 10 miles
Wind: W at 8 mph
Pressure: 30.17 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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REST OF TODAY
Mostly cloudy. Cooler with highs in the mid 60s. Light and variable winds.
TONIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 40s. Light and variable winds.
FRIDAY
Mostly sunny. Highs in the lower 60s. Light and variable winds, becoming southeast around 10 mph in the afternoon.
FRIDAY NIGHT
Partly cloudy. Lows in the mid 40s. Light and variable winds.
SATURDAY
Mostly cloudy. Highs in the lower 60s. Light and variable winds.
SATURDAY NIGHT
Cloudy. A chance of showers after midnight. Lows in the mid 40s. Chance of rain 40 percent.
SUNDAY
Showers likely. Highs in the mid 50s. Chance of rain 70 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 lower 60s. Chance of rain 70 percent.
MONDAY NIGHT
Mostly cloudy. Lows in the upper 40s.
TUESDAY
Partly sunny. Highs in the lower 70s.
TUESDAY NIGHT
Partly cloudy. Lows in the lower 50s.
WEDNESDAY
Partly sunny. A chance of showers in the afternoon. Highs in the mid 70s. 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 AM EDT  5/21/2026
Thursday
21 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 62° 62° Mostly Cloudy 2%

0% Thunder
( 0% severe)
SSE   6 39% 37°
High 64° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 63° 63° Mostly Cloudy S   6 38% 37°
Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 59° 60° Mostly Cloudy 0%

0% Thunder
( 0% severe)
SW   3 46% 38°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 53° 52° Mostly Cloudy N   5 57% 38°
Friday
22 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 48° 47° Partly Cloudy 0%

0% Thunder
( 0% severe)
N   3 60% 35°
Low 45° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 45° 44° Partly Cloudy N   3 65% 34°
High 65° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 52° 51° Clear 0%

0% Thunder
( 0% severe)
NNE   5 50% 34°

Increasing Clouds



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 59° 60° Partly Cloudy ENE   3 36% 32°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 61° 60° Partly Cloudy 0%

0% Thunder
( 0% severe)
SE   8 36% 34°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 60° 59° Mostly Cloudy SSE   9 39% 35°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 55° 54° Mostly Cloudy 0%

0% Thunder
( 0% severe)
S   5 51% 37°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 51° 51° Mostly Cloudy   CALM 59% 37°
Saturday
23 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 48° 47° Mostly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 65% 37°
Low 46° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 46° 45° Mostly Cloudy   CALM 73% 38°
High 63° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 53° 53° Mostly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 64% 41°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 60° 59° Mostly Cloudy E   7 46% 39°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 60° 59° Mostly Cloudy 1%

0% Thunder
( 0% severe)
ESE   7 46% 39°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 58° 57° Mostly Cloudy SE   7 47% 38°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 54° 54° Mostly Cloudy     SSE   2 61% 41°

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 45° Low 44° Low 51° Low 56° Low 51°
High 56° High 62° High 72° High 70° High 70°
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
Mostly Cloudy
49% Rain
Overcast
67% Rain
Overcast
22% Rain
Partly Cloudy
27% Rain
Partly Cloudy
28% Rain
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