PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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03803 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
PORTSMOUTH, NH Current Weather
6:55 PM EDT SEP 20, 2026
Overcast Light Rain Mist 57°F
Feels Like:	56°F
Dewpoint:	55°F
Rel. Hum.:	93%
Visibility:	1 1/2 miles
Wind:	ENE at 7 mph
Pressure:
Last 72 hours
Local Area Snow Depth
New Hampshire Current Weather
New Hampshire MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

03803 WEATHER FORECAST
10-Day model forecast maps 2026 Hurricanes	PORTSMOUTH, NH 03803 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Rain in the evening, then a chance of showers after midnight. Patchy fog. Lows around 50. Light and variable winds. Chance of rain near 100 percent.

MONDAY
Patchy fog in the morning. Partly sunny. Highs in the mid 60s. Northeast winds around 10 mph.

MONDAY NIGHT
Mostly cloudy. Lows in the upper 40s. Light and variable winds, becoming northeast around 10 mph with gusts up to 20 mph after midnight.

TUESDAY
Mostly cloudy in the morning, then becoming partly sunny. Highs in the lower 60s. Northeast winds around 10 mph with gusts up to 20 mph.

TUESDAY NIGHT
Partly cloudy. Lows in the upper 40s.

WEDNESDAY
Partly sunny. Highs in the lower 60s.

WEDNESDAY NIGHT
Partly cloudy. Lows in the upper 40s.

THURSDAY
Partly sunny. Highs in the lower 60s.

THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s.

FRIDAY
Mostly cloudy. A chance of showers in the afternoon. Highs in the lower 60s. Chance of rain 30 percent.

FRIDAY NIGHT
Mostly cloudy with a 40 percent chance of showers. Lows in the upper 40s.

SATURDAY
Mostly cloudy in the morning, then becoming partly sunny. A 40 percent chance of showers. Highs in the mid 60s.

03803 WEATHER SATELLITE LOOPS

Visible Weather Satellite
PORTSMOUTH, NH 03803

Infrared Weather Satellite
PORTSMOUTH, NH 03803

03803 WEATHER RADAR LOOP

NEXRAD Weather Radar
PORTSMOUTH, NH 03803

MOS COMPUTER WEATHER FORECAST

PORTSMOUTH, NH 3 hourly weather forecast

weather forecast created 8:00 AM EDT 9/20/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Sunday
20 SEP 2026

2 PM

61°

60°

Mostly Cloudy

94%
RAIN
***

0% Thunder
( 3% severe)

SE 8

72%

52°

High 62°

5 PM

60°

59°

Mostly Cloudy

ESE 8

81%

54°

Mostly Cloudy

Rain

8 PM

57°

56°

Mostly Cloudy

94%
RAIN
***

0% Thunder
( 1% severe)

E 7

93%

55°

11 PM

56°

55°

Mostly Cloudy

NE 5

100%

56°

Monday
21 SEP 2026

2 AM

55°

53°

Overcast

33%
RAIN
.01–.1 in

0% Thunder
( 0% severe)

N 7

100%

55°

Low 52°

5 AM

53°

50°

Mostly Cloudy

N 9

100%

53°

High 67°

8 AM

52°

49°

Mostly Cloudy

0%

0% Thunder
( 0% severe)

N 9

100%

52°

Mostly Cloudy

11 AM

63°

62°

Partly Cloudy

NNE 10

65%

51°

2 PM

67°

67°

Partly Cloudy

0%

0% Thunder
( 0% severe)

NE 8

54%

50°

5 PM

65°

65°

Mostly Cloudy

E 7

56%

49°

8 PM

57°

58°

Mostly Cloudy

0%

0% Thunder
( 0% severe)

NNE 2

69%

47°

11 PM

53°

51°

Mostly Cloudy

NNE 7

77%

46°

Tuesday
22 SEP 2026

2 AM

50°

46°

Overcast

0%

0% Thunder
( 0% severe)

NNE 9

83%

45°

Low 48°

5 AM

49°

45°

Overcast

NNE 10

83%

44°

High 63°

8 AM

50°

46°

Mostly Cloudy

0%

0% Thunder
( 0% severe)

NE 10

77%

43°

Mostly Cloudy

11 AM

59°

57°

Mostly Cloudy

NE 13

53%

42°

2 PM

62°

60°

Mostly Cloudy

1%

0% Thunder
( 0% severe)

ENE 13

48%

42°

5 PM

60°

58°

Partly Cloudy

ENE 10

51%

42°

8 PM

54°

53°

Mostly Cloudy

ENE 6

64%

42°


PORTSMOUTH, NH extended weather forecast
Wednesday 23 SEP 2026	Thursday 24 SEP 2026	Friday 25 SEP 2026	Saturday 26 SEP 2026	Sunday 27 SEP 2026
Low 45°	Low 45°	Low 48°	Low 48°	Low 44°
High 59°	High 60°	High 60°	High 64°	High 59°

Overcast 22% Rain	Overcast 26% Rain	Overcast 59% Rain	Overcast 55% Rain	Mostly Cloudy 20% Rain

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