National Weather Service Forecast for: Topsham ME
Issued by: National Weather Service Gray/Portland, ME
Updated: 2:26 am EDT Jun 30, 2026
 
Today

Today: Mostly sunny, with a high near 83. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Mostly Sunny

 Tonight

Tonight: A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 62. South wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Showers
Likely
 Wednesday

Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly sunny and hot, with a high near 91. Heat index values as high as 101. Southwest wind around 5 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Mostly Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 70. South wind around 5 mph becoming calm.
Partly Cloudy

 Thursday

Thursday: Mostly sunny and hot, with a high near 97. Calm wind becoming southwest around 5 mph in the afternoon.
Hot

 Thursday
Night
Thursday Night: Mostly clear, with a low around 73.
Mostly Clear

 Friday

Friday: Sunny and hot, with a high near 99.
Hot

 Friday
Night
Friday Night: Mostly clear, with a low around 69.
Mostly Clear

 Independence
Day
Independence Day: A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89.
Mostly Sunny
then Chance
T-storms
Hi 83 °F Lo 62 °F Hi 91 °F Lo 70 °F Hi 97 °F Lo 73 °F Hi 99 °F Lo 69 °F Hi 89 °F

Extreme Heat Watch
 

Today
 
 Mostly sunny, with a high near 83. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tonight
 
 A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 62. South wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly sunny and hot, with a high near 91. Heat index values as high as 101. Southwest wind around 5 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 Partly cloudy, with a low around 70. South wind around 5 mph becoming calm.
Thursday
 
 Mostly sunny and hot, with a high near 97. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 73.
Friday
 
 Sunny and hot, with a high near 99.
Friday Night
 
 Mostly clear, with a low around 69.
Independence Day
 
 A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66.
Sunday
 
 Mostly sunny, with a high near 87.
Sunday Night
 
 Partly cloudy, with a low around 63.
Monday
 
 Partly sunny, with a high near 83.

 

Forecast from NOAA-NWS for Topsham ME.