National Weather Service Forecast for: Portsmouth NH
Issued by: National Weather Service Gray/Portland, ME
Updated: 9:13 am EDT Jun 2, 2025
 
Today

Today: Mostly sunny, with a high near 70. Southwest wind around 10 mph.
Mostly Sunny

 Tonight

Tonight: Partly cloudy, with a low around 49. South wind around 5 mph becoming calm in the evening.
Partly Cloudy

 Tuesday

Tuesday: Sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the afternoon.
Sunny

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 52. South wind around 5 mph becoming calm.
Mostly Clear

 Wednesday

Wednesday: Mostly sunny, with a high near 78. Calm wind becoming south around 5 mph in the afternoon.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 60.
Mostly Clear

 Thursday

Thursday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 82.
Sunny then
Chance
Showers
 Thursday
Night
Thursday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 63.
Chance
Showers then
Partly Cloudy
 Friday

Friday: A 40 percent chance of showers after 2pm. Partly sunny, with a high near 78.
Partly Sunny
then Chance
Showers
Hi 70 °F Lo 49 °F Hi 72 °F Lo 52 °F Hi 78 °F Lo 60 °F Hi 82 °F Lo 63 °F Hi 78 °F

 

Today
 
 Mostly sunny, with a high near 70. Southwest wind around 10 mph.
Tonight
 
 Partly cloudy, with a low around 49. South wind around 5 mph becoming calm in the evening.
Tuesday
 
 Sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
 
 Mostly clear, with a low around 52. South wind around 5 mph becoming calm.
Wednesday
 
 Mostly sunny, with a high near 78. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 60.
Thursday
 
 A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 82.
Thursday Night
 
 A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 63.
Friday
 
 A 40 percent chance of showers after 2pm. Partly sunny, with a high near 78.
Friday Night
 
 Showers likely, mainly after 8pm. Cloudy, with a low around 60. Chance of precipitation is 60%.
Saturday
 
 Showers likely. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
Saturday Night
 
 A 40 percent chance of showers. Partly cloudy, with a low around 57.
Sunday
 
 Sunny, with a high near 73.

 

Forecast from NOAA-NWS for Portsmouth NH.