PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

11:55 PM EDT MAY 19, 2026
Broken Clouds
72°F
Feels Like: 72°F
Dewpoint: 68°F
Rel. Hum.: 87%
Visibility: 10 miles
Wind: WSW at 5 mph
Pressure: 29.86 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy with a chance of showers and thunderstorms this evening, then mostly clear after midnight. Some thunderstorms may produce gusty winds and small hail this evening. Lows in the upper 60s. Southwest winds around 10 mph. Chance of rain 40 percent.
WEDNESDAY
Partly sunny. A chance of showers with a slight chance of thunderstorms in the 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.
WEDNESDAY NIGHT
Partly cloudy. A slight chance of showers in the evening. 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
Mostly cloudy in the morning, then becoming 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
Partly sunny. Highs in the mid 60s.
FRIDAY NIGHT
Partly cloudy. Lows in the upper 40s.
SATURDAY
Mostly cloudy with a 30 percent chance of showers. Highs around 60.
SATURDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 40s.
SUNDAY
Partly sunny in the morning, then becoming mostly cloudy. A 50 percent chance of showers. Highs in the upper 50s.
SUNDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 40s.
MEMORIAL DAY
Mostly cloudy with a 50 percent chance of showers. Highs in the lower 60s.
MONDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 40s.

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  5/19/2026
Tuesday
19 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 89° 89° Clear 31%
RAIN
<.01 in
0% Thunder
( 17% severe)
WSW   14 39% 61°
High 90° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 86° 87° Mostly Cloudy W   12 48% 64°
Partly Cloudy

Chance of Rain

PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 78° 80° Partly Cloudy 2%

0% Thunder
( 6% severe)
WSW   8 62% 64°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 73° 73° Clear WSW   8 73% 64°
Wednesday
20 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 69° 69° Partly Cloudy 5%

0% Thunder
( 2% severe)
SW   7 78% 62°
Low 69° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 69° 69° Partly Cloudy SW   8 76% 61°
High 88° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 74° 74° Partly Cloudy 10%
RAIN
<.01 in
0% Thunder
( 5% severe)
WSW   9 69% 63°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 83° 84° Partly Cloudy W   13 53% 64°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 84° 85° Partly Cloudy 19%
RAIN
<.01 in
0% Thunder
( 8% severe)
W   15 49% 63°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 81° 82° Partly Cloudy W   14 51% 61°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 73° 73° Mostly Cloudy 1%

0% Thunder
( 1% severe)
WNW   9 48% 52°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 65° 65° Mostly Cloudy NW   9 50% 46°
Thursday
21 MAY 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 58° 56° Mostly Cloudy 0%

0% Thunder
( 0% severe)
NW   9 53% 41°
Low 52° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 53° 50° Mostly Cloudy NW   8 57% 38°
High 66° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 53° 50° Mostly Cloudy 0%

0% Thunder
( 0% severe)
NNW   8 52% 36°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 59° 58° Partly Cloudy NNW   6 39% 34°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 63° 63° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   6 34% 34°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 63° 63° Partly Cloudy WSW   8 32% 33°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 57° 56° Partly Cloudy     WNW   6 42% 34°

PORTSMOUTH, NH extended weather forecast

Friday
22 MAY 2026
Saturday
23 MAY 2026
Sunday
24 MAY 2026
Monday
25 MAY 2026
Tuesday
26 MAY 2026
Low 42° Low 48° Low 45° Low 46° Low 50°
High 67° High 66° High 64° High 65° High 68°
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
5% Rain
Partly Cloudy
7% Rain
Partly Cloudy
10% Rain
Overcast
50% Rain
Overcast
56% Rain
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