PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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03803 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
PORTSMOUTH, NH Current Weather
11:55 AM EDT MAY 19, 2026
Broken Clouds 91°F
Feels Like:	90°F
Dewpoint:	59°F
Rel. Hum.:	34%
Visibility:	10 miles
Wind:	WSW at 15 mph
Pressure:	29.92 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 2025 Hurricanes	PORTSMOUTH, NH 03803 Weather Forecast	Snowfall Forecast pages Snow Depth pages

REST OF TODAY
Partly sunny. A chance of showers and thunderstorms this afternoon. Some thunderstorms may produce gusty winds and small hail this afternoon. Warmer with highs in the lower 90s. Southwest winds around 10 mph. Gusts up to 25 mph this afternoon. Chance of rain 50 percent.

TONIGHT
Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Some thunderstorms may produce gusty winds and small hail in the evening. Lows in the upper 60s. Southwest winds around 10 mph. Chance of rain 40 percent.

WEDNESDAY
Partly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Warm with highs in the upper 80s. West winds around 10 mph with gusts up to 25 mph. Chance of rain 30 percent.

WEDNESDAY NIGHT
Partly cloudy. Less humid with lows in the lower 50s. Northwest winds around 10 mph.

THURSDAY
Partly sunny. Cooler with highs in the mid 60s. Northwest winds around 10 mph in the morning, becoming light and variable.

THURSDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s.

FRIDAY
Partly sunny. Highs in the mid 60s.

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

SATURDAY
Showers likely. Highs in the upper 50s. Chance of rain 60 percent.

SATURDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 40s.

SUNDAY
Mostly cloudy with a 50 percent chance of showers. Highs in the upper 50s.

SUNDAY NIGHT
Mostly cloudy with a 40 percent chance of showers. Lows in the mid 40s.

MEMORIAL DAY
Mostly cloudy with a 30 percent chance of showers. 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 5/18/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Tuesday
19 MAY 2026

2 AM

57°

58°

Clear

1%

0% Thunder
( 5% severe)

CALM

90%

54°

Low 56°

5 AM

60°

60°

Partly Cloudy

SW 5

87%

56°

High 92°

8 AM

70°

70°

Partly Cloudy

4%

0% Thunder
( 2% severe)

WSW 6

73%

61°

Partly Cloudy

Chance of Rain

11 AM

85°

86°

Clear

WSW 9

50%

64°

2 PM

90°

90°

Partly Cloudy

22%
RAIN
<.01 in

0% Thunder
( 20% severe)

WSW 14

38%

61°

5 PM

88°

89°

Partly Cloudy

W 12

43%

63°

8 PM

80°

81°

Partly Cloudy

9%

0% Thunder
( 11% severe)

SW 8

56%

63°

11 PM

74°

74°

Partly Cloudy

WSW 8

69%

63°

Wednesday
20 MAY 2026

2 AM

72°

72°

Partly Cloudy

5%

0% Thunder
( 2% severe)

WSW 8

71%

62°

Low 71°

5 AM

71°

71°

Partly Cloudy

SW 9

71%

61°

High 88°

8 AM

75°

75°

Partly Cloudy

9%

0% Thunder
( 8% severe)

WSW 10

66%

63°

Partly Cloudy

Chance of Rain

11 AM

84°

85°

Partly Cloudy

WSW 14

49%

63°

2 PM

85°

86°

Partly Cloudy

25%
RAIN
<.01 in

0% Thunder
( 13% severe)

W 15

46%

62°

5 PM

82°

82°

Partly Cloudy

W 14

47%

60°

8 PM

73°

73°

Mostly Cloudy

1%

0% Thunder
( 1% severe)

WNW 9

51%

54°

11 PM

64°

63°

Partly Cloudy

NW 10

54%

47°


PORTSMOUTH, NH extended weather forecast
Thursday 21 MAY 2026	Friday 22 MAY 2026	Saturday 23 MAY 2026	Sunday 24 MAY 2026	Monday 25 MAY 2026
Low 51°	Low 42°	Low 48°	Low 45°	Low 46°
High 63°	High 67°	High 66°	High 64°	High 65°

Partly Cloudy 7% Rain	Partly Cloudy 5% Rain	Partly Cloudy 7% Rain	Partly Cloudy 10% Rain	Overcast 50% Rain

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