PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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03803 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
PORTSMOUTH, NH Current Weather
8:55 AM EDT AUG 17, 2026
Overcast Mist 68°F
Feels Like:	68°F
Dewpoint:	64°F
Rel. Hum.:	87%
Visibility:	5 miles
Wind:	S at 13 mph, gusts to 24
Pressure:	29.89 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
Cloudy. Showers likely, mainly this morning. Highs in the mid 70s. South winds around 10 mph. Chance of rain 60 percent.

TONIGHT
Mostly cloudy with a 40 percent chance of showers. Patchy fog. Humid with lows in the mid 60s. Light and variable winds.

TUESDAY
Mostly cloudy in the morning, then becoming partly sunny. Patchy fog in the morning. Humid with highs in the upper 70s. Light and variable winds.

TUESDAY NIGHT
Partly cloudy. Humid with lows in the lower 60s. Light and variable winds.

WEDNESDAY
Partly sunny. Humid with highs in the lower 80s. Light and variable winds, becoming south around 10 mph in the afternoon.

WEDNESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s.

THURSDAY
Partly sunny. A chance of showers in the afternoon. Highs in the lower 80s. Chance of rain 30 percent.

THURSDAY NIGHT
Partly cloudy with a chance of showers in the evening, then mostly clear after midnight. Lows around 60. Chance of rain 30 percent.

FRIDAY
Mostly sunny. Highs around 80.

FRIDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows around 60.

SATURDAY
Partly sunny. A chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 30 percent.

SATURDAY NIGHT
Partly cloudy with a 30 percent chance of showers. Lows around 60.

SUNDAY
Partly sunny with a 50 percent chance of showers. Highs in the upper 70s.

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 8/16/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Monday
17 AUG 2026

2 AM

68°

68°

Mostly Cloudy

56%
RAIN
.5–1 in

0% Thunder
( 9% severe)

S 8

84%

63°

Low 66°

5 AM

67°

67°

Mostly Cloudy

S 9

90%

64°

High 77°

8 AM

67°

67°

Mostly Cloudy

54%
RAIN
.1–.25 in

0% Thunder
( 6% severe)

S 9

90%

64°

Mostly Cloudy

Rain Likely

11 AM

71°

71°

Mostly Cloudy

S 10

81%

65°

2 PM

73°

73°

Mostly Cloudy

20%
RAIN
.01–.1 in

0% Thunder
( 9% severe)

SSE 10

79%

66°

5 PM

74°

74°

Mostly Cloudy

SE 9

76%

66°

8 PM

71°

71°

Mostly Cloudy

12%
RAIN
<.01 in

0% Thunder
( 9% severe)

ESE 6

84%

66°

11 PM

67°

67°

Mostly Cloudy

CALM

100%

67°

Tuesday
18 AUG 2026

2 AM

67°

67°

Mostly Cloudy

12%
RAIN
<.01 in

0% Thunder
( 5% severe)

CALM

100%

67°

Low 65°

5 AM

66°

66°

Mostly Cloudy

CALM

100%

66°

High 81°

8 AM

68°

68°

Mostly Cloudy

10%
RAIN
<.01 in

0% Thunder
( 6% severe)

N 3

97%

67°

Mostly Cloudy

11 AM

75°

75°

Mostly Cloudy

NNE 6

79%

68°

2 PM

78°

80°

Partly Cloudy

11%
RAIN
<.01 in

0% Thunder
( 8% severe)

NE 7

71%

68°

5 PM

77°

79°

Partly Cloudy

E 6

71%

67°

8 PM

71°

71°

Partly Cloudy

7%

0% Thunder
( 3% severe)

ESE 3

84%

66°

11 PM

66°

66°

Mostly Cloudy

CALM

100%

66°


PORTSMOUTH, NH extended weather forecast
Wednesday 19 AUG 2026	Thursday 20 AUG 2026	Friday 21 AUG 2026	Saturday 22 AUG 2026	Sunday 23 AUG 2026
Low 61°	Low 65°	Low 60°	Low 60°	Low 61°
High 83°	High 76°	High 78°	High 79°	High 79°

Overcast 16% Rain	Overcast 63% Rain	Mostly Cloudy 37% Rain	Mostly Cloudy 33% Rain	Overcast 57% Rain

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