PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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03803 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
PORTSMOUTH, NH Current Weather
10:55 AM EDT SEP 17, 2026
Broken Clouds 72°F
Feels Like:	72°F
Dewpoint:	61°F
Rel. Hum.:	68%
Visibility:	10 miles
Wind:	E at 7 mph
Pressure:	30.25 inches
Last 72 hours
Local Area Snow Depth
New Hampshire Current Weather
New Hampshire MOS Forecast Weather

Weather Map

(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

TODAY
Partly sunny this morning, then mostly cloudy with a chance of showers this afternoon. Highs in the lower 70s. Light and variable winds. Chance of rain 40 percent.

TONIGHT
A slight chance of thunderstorms. Showers. Patchy fog. Humid with lows in the lower 60s. Light and variable winds. Chance of rain 90 percent.

FRIDAY
Mostly sunny. Highs in the mid 70s. Northwest winds around 10 mph with gusts up to 25 mph.

FRIDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s. Northwest winds around 10 mph with gusts up to 20 mph in the evening, becoming light and variable.

SATURDAY
Mostly sunny. Highs in the mid 60s. Light and variable winds.

SATURDAY NIGHT
Partly cloudy. Lows around 50.

SUNDAY
A chance of showers in the morning, then showers likely in the afternoon. Highs in the lower 60s. Chance of rain 70 percent.

SUNDAY NIGHT
Showers likely, mainly in the evening. Lows around 50. Chance of rain 70 percent.

MONDAY
Partly sunny. Highs in the mid 60s.

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

TUESDAY
Partly sunny. Highs in the lower 60s.

TUESDAY NIGHT
Mostly clear. Lows in the upper 40s.

WEDNESDAY
Mostly sunny. Highs in the lower 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 PM EDT 9/16/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Thursday
17 SEP 2026

2 AM

63°

64°

Mostly Cloudy

1%

0% Thunder
( 0% severe)

NNW 1

100%

63°

Low 61°

5 AM

62°

63°

Mostly Cloudy

N 2

97%

61°

High 74°

8 AM

63°

64°

Mostly Cloudy

3%

0% Thunder
( 1% severe)

NE 3

93%

61°

Mostly Cloudy

Rain Likely

11 AM

71°

71°

Mostly Cloudy

E 5

73%

62°

2 PM

72°

72°

Mostly Cloudy

69%
RAIN
.5–1 in

0% Thunder
( 13% severe)

ESE 6

71%

62°

5 PM

68°

68°

Mostly Cloudy

E 6

81%

62°

8 PM

66°

66°

Mostly Cloudy

87%
RAIN
***

0% Thunder
( 21% severe)

E 3

93%

64°

11 PM

65°

65°

Mostly Cloudy

CALM

100%

65°

Friday
18 SEP 2026

2 AM

64°

66°

Mostly Cloudy

35%
RAIN
.1–.25 in

0% Thunder
( 6% severe)

W 2

100%

64°

Low 62°

5 AM

64°

65°

Mostly Cloudy

WNW 5

100%

64°

High 76°

8 AM

63°

63°

Partly Cloudy

1%

0% Thunder
( 0% severe)

NNW 8

97%

62°

Partly Cloudy

11 AM

72°

72°

Partly Cloudy

NNW 9

57%

56°

2 PM

75°

75°

Clear

0%

0% Thunder
( 0% severe)

NW 13

41%

50°

5 PM

72°

72°

Partly Cloudy

NW 13

38%

45°

8 PM

63°

63°

Partly Cloudy

0%

0% Thunder
( 0% severe)

NW 8

50%

44°

11 PM

56°

54°

Partly Cloudy

N 7

66%

45°


PORTSMOUTH, NH extended weather forecast
Saturday 19 SEP 2026	Sunday 20 SEP 2026	Monday 21 SEP 2026	Tuesday 22 SEP 2026	Wednesday 23 SEP 2026
Low 47°	Low 45°	Low 48°	Low 46°	Low 45°
High 62°	High 60°	High 66°	High 59°	High 62°

Clear 1% Rain	Mostly Cloudy 58% Rain	Overcast 57% Rain	Partly Cloudy 16% Rain	Mostly Cloudy 26% Rain

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