PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

1:55 AM EDT JUL 13, 2026
Broken Clouds
66°F
Feels Like: 66°F
Dewpoint: 55°F
Rel. Hum.: 68%
Visibility: 10 miles
Wind: Calm
Pressure: 30.17 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. Light and variable winds.
MONDAY
Mostly sunny. Warm with highs in the upper 80s. Light and variable winds, becoming south around 10 mph with gusts up to 20 mph in the afternoon.
MONDAY NIGHT
Partly cloudy in the evening, then clearing. Lows in the upper 60s. Southwest winds around 10 mph.
TUESDAY
Mostly sunny. Hot with highs in the mid 90s. Southwest winds around 10 mph with gusts up to 25 mph. Heat index values in the upper 90s in the afternoon.
TUESDAY NIGHT
Partly cloudy. Lows in the mid 70s.
WEDNESDAY
Partly sunny. Hot with highs in the lower 90s.
WEDNESDAY NIGHT
Partly cloudy. Lows in the upper 60s.
THURSDAY
Mostly sunny. Warm with highs in the upper 80s.
THURSDAY NIGHT
Mostly clear. Lows in the mid 60s.
FRIDAY
Mostly sunny. Highs in the lower 80s.
FRIDAY NIGHT
Mostly clear. Lows in the lower 60s.
SATURDAY
Mostly sunny. Highs around 80.

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  7/12/2026
Monday
13 JUL 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 64° 65° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   5 78% 57°
Low 62° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 63° 64° Partly Cloudy SW   5 81% 57°
High 89° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 70° 70° Clear 1%

0% Thunder
( 0% severe)
SW   6 68% 59°

Increasing Clouds



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 83° 83° Partly Cloudy SSW   8 47% 61°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 87° 87° Partly Cloudy 9%

0% Thunder
( 14% severe)
S   12 42% 61°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 86° 87° Mostly Cloudy SSW   12 46% 63°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 80° 82° Mostly Cloudy 13%
RAIN
<.01 in
0% Thunder
( 16% severe)
SSW   9 58% 64°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 75° 75° Partly Cloudy SW   9 69% 64°
Tuesday
14 JUL 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 72° 72° Partly Cloudy 2%

0% Thunder
( 1% severe)
SW   9 73% 63°
Low 69° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 69° 69° Partly Cloudy WSW   8 78% 62°
High 99° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 76° 78° Partly Cloudy 0%

0% Thunder
( 1% severe)
WSW   8 64% 63°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 89° 91° Mostly Cloudy WSW   12 44% 64°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 96° 98° Partly Cloudy 0%

0% Thunder
( 8% severe)
WSW   15 35% 64°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 98° 101° Partly Cloudy WSW   15 34% 65°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 91° 94° Partly Cloudy 3%

0% Thunder
( 20% severe)
WSW   12 45% 67°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 86° 89° Partly Cloudy W   10 53% 67°

PORTSMOUTH, NH extended weather forecast

Wednesday
15 JUL 2026
Thursday
16 JUL 2026
Friday
17 JUL 2026
Saturday
18 JUL 2026
Sunday
19 JUL 2026
Low 74° Low 65° Low 63° Low 58° Low 61°
High 92° High 86° High 78° High 79° High 76°
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
Partly Cloudy
29% Rain
Partly Cloudy
9% Rain
Partly Cloudy
9% Rain
Mostly Cloudy
20% Rain
Overcast
61% Rain
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