PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

6:55 PM EDT OCT 20, 2025
Broken Clouds
57°F
Feels Like: 56°F
Dewpoint: 54°F
Rel. Hum.: 90%
Visibility: 10 miles
Wind: SSE at 7 mph
Pressure: 29.66 inches
Last 72 hours

Local Area Snow Depth

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy. Lows in the upper 40s. Southwest winds 10 to 15 mph with gusts up to 30 mph.
TUESDAY
Mostly sunny. Highs in the mid 60s. Southwest winds 10 to 15 mph with gusts up to 25 mph.
TUESDAY NIGHT
Mostly clear with a slight chance of showers in the evening, then mostly cloudy with showers likely after midnight. Lows around 50. South winds around 10 mph. Chance of rain 70 percent.
WEDNESDAY
Showers. Highs in the lower 60s. South winds around 10 mph with gusts up to 20 mph. Chance of rain near 100 percent.
WEDNESDAY NIGHT
Partly cloudy with showers likely in the evening, then mostly clear after midnight. Lows in the lower 40s. Southwest winds around 10 mph in the evening, becoming light and variable. Chance of rain 60 percent.
THURSDAY
Mostly sunny. A chance of showers in the afternoon. Highs around 60. Chance of rain 30 percent.
THURSDAY NIGHT
Partly cloudy in the evening, then clearing. Lows around 40.
FRIDAY
Mostly sunny. Highs in the upper 50s.
FRIDAY NIGHT
Partly cloudy. Lows in the upper 30s.
SATURDAY
Partly sunny. Highs in the upper 50s.
SATURDAY NIGHT
Partly cloudy. Lows in the mid 30s.
SUNDAY
Partly sunny. Highs in the mid 50s.
SUNDAY NIGHT
Partly cloudy. Lows in the upper 30s.

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 AM EDT 10/20/2025
Monday
20 OCT 2025
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 62° 60° Overcast 88%
RAIN
***
0% Thunder
( 12% severe)
SSE   17 87% 58°
High 63° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 60° 58° Mostly Cloudy SSE   14 84% 55°
Mostly Cloudy

Rain Likely

PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 55° 52° Partly Cloudy 25%
RAIN
.01–.1 in
0% Thunder
( 2% severe)
S   9 93% 53°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 54° 52° Mostly Cloudy SSW   8 86% 50°
Tuesday
21 OCT 2025
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 52° 49° Mostly Cloudy 19%
RAIN
<.01 in
0% Thunder
( 3% severe)
SW   8 86% 48°
Low 48° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 50° 46° Partly Cloudy SW   9 86% 46°
High 66° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 51° 48° Partly Cloudy 4%

0% Thunder
( 0% severe)
SW   9 83% 46°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 60° 58° Clear WSW   12 58% 45°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 64° 63° Clear 1%

0% Thunder
( 0% severe)
SW   12 46% 43°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 62° 61° Clear SW   9 52% 44°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 54° 52° Partly Cloudy 14%
RAIN
<.01 in
0% Thunder
( 1% severe)
SSW   7 74% 46°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 53° 51° Partly Cloudy SSW   6 80% 47°
Wednesday
22 OCT 2025
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 2 AM 52° 51° Mostly Cloudy 68%
RAIN
***
0% Thunder
( 5% severe)
S   5 89% 49°
Low 49° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 5 AM 52° 50° Mostly Cloudy SSE   6 96% 51°
High 66° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 8 AM 54° 52° Mostly Cloudy 84%
RAIN
***
0% Thunder
( 14% severe)
SSE   7 96% 53°

Mostly Cloudy

Rain Likely

PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 11 AM 60° 58° Mostly Cloudy S   10 81% 54°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 2 PM 63° 62° Partly Cloudy 54%
RAIN
1–2 in
0% Thunder
( 5% severe)
SSW   12 65% 51°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 5 PM 61° 60° Partly Cloudy SSW   10 62% 48°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 8 PM 53° 50° Partly Cloudy     SW   8 80% 47°

PORTSMOUTH, NH extended weather forecast

Thursday
23 OCT 2025
Friday
24 OCT 2025
Saturday
25 OCT 2025
Sunday
26 OCT 2025
Monday
27 OCT 2025
Low 44° Low 40° Low 39° Low 36° Low 37°
High 59° High 57° High 54° High 54° High 52°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
29% Rain
Partly Cloudy
18% Rain
Partly Cloudy
22% Rain
Partly Cloudy
15% Rain
Partly Cloudy
30% Rain
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