PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

12:55 PM EDT MAY 20, 2026
Broken Clouds
88°F
Feels Like: 89°F
Dewpoint: 64°F
Rel. Hum.: 45%
Visibility: 10 miles
Wind: W at 12 mph, gusts to 20
Pressure: 29.79 inches
Last 72 hours

Local Area Snow Depth

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly sunny. A chance of showers with a slight chance of thunderstorms this afternoon. Warm with highs in the upper 80s. West winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 30 percent.
TONIGHT
Partly cloudy with a slight chance of showers in the evening, then mostly cloudy after midnight. Less humid with lows in the lower 50s. Northwest winds 10 to 15 mph. Gusts up to 30 mph in the evening. Chance of rain 20 percent.
THURSDAY
Partly sunny. Cooler with highs in the mid 60s. Light and variable winds.
THURSDAY NIGHT
Mostly clear. Lows in the mid 40s. Light and variable winds.
FRIDAY
Mostly sunny. Highs in the mid 60s. Light and variable winds, becoming south around 10 mph in the afternoon.
FRIDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s.
SATURDAY
Mostly cloudy. Highs in the lower 60s.
SATURDAY NIGHT
Mostly cloudy. Lows in the mid 40s.
SUNDAY
Mostly cloudy with a 40 percent chance of showers. Highs in the upper 50s.
SUNDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows in the mid 40s. Chance of rain 50 percent.
MEMORIAL DAY
Mostly cloudy with a 50 percent chance of showers. Highs in the lower 60s.
MONDAY NIGHT
Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Lows in the upper 40s. Chance of rain 40 percent.
TUESDAY
Partly sunny. Highs around 70.

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  5/20/2026
Wednesday
20 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 87° 88° Partly Cloudy 13%
RAIN
<.01 in
0% Thunder
( 12% severe)
W   14 46% 64°
High 88° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 84° 85° Partly Cloudy W   13 49% 63°
Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 75° 75° Mostly Cloudy 3%

0% Thunder
( 1% severe)
WNW   8 50% 55°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 68° 68° Mostly Cloudy NW   8 49% 48°
Thursday
21 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 60° 59° Mostly Cloudy 2%

0% Thunder
( 0% severe)
NW   7 53% 43°
Low 55° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 56° 54° Mostly Cloudy NNW   7 55% 40°
High 65° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 56° 55° Mostly Cloudy 1%

0% Thunder
( 0% severe)
N   5 53% 39°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 60° 60° Mostly Cloudy SSE   5 42% 37°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 62° 62° Mostly Cloudy 0%

0% Thunder
( 0% severe)
S   6 38% 36°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 63° 63° Partly Cloudy SW   7 36% 36°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 57° 57° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   5 47% 37°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 51° 50° Mostly Cloudy N   3 59% 37°
Friday
22 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 47° 46° Partly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 65% 36°
Low 45° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 45° 44° Partly Cloudy NNW   2 68% 35°
High 65° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 53° 53° Clear 0%

0% Thunder
( 0% severe)
  CALM 52% 36°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 61° 62° Clear ESE   2 35% 33°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 63° 63° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   8 34% 34°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 62° 61° Partly Cloudy S   9 38% 36°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 56° 55° Partly Cloudy     S   6 51% 38°

PORTSMOUTH, NH extended weather forecast

Saturday
23 MAY 2026
Sunday
24 MAY 2026
Monday
25 MAY 2026
Tuesday
26 MAY 2026
Wednesday
27 MAY 2026
Low 48° Low 44° Low 46° Low 51° Low 57°
High 64° High 59° High 62° High 73° 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
Partly Cloudy
3% Rain
Mostly Cloudy
11% Rain
Overcast
51% Rain
Mostly Cloudy
32% Rain
Partly Cloudy
23% Rain
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