National Weather Service Forecast for: Waltham MA
Issued by: National Weather Service Norton, MA
Updated: 3:27 pm EDT Jul 28, 2026
 
Tonight

Tonight: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 65. Southeast wind 5 to 9 mph. Chance of precipitation is 20%.
Slight Chance
T-storms

 Wednesday

Wednesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. High near 76. Southeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Chance
Showers then
Heavy Rain
 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm. Low around 61. Northeast wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Showers

 Thursday

Thursday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 72. North wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Showers

 Thursday
Night
Thursday Night: Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 60. North wind 5 to 7 mph. Chance of precipitation is 60%.
Showers
Likely then
Slight Chance
T-storms
 Friday

Friday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 79. North wind around 7 mph. Chance of precipitation is 20%.
Partly Sunny
then Slight
Chance
T-storms
 Friday
Night
Friday Night: Mostly clear, with a low around 62. Calm wind.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 83. Calm wind becoming east around 6 mph in the afternoon.
Sunny

 Saturday
Night
Saturday Night: Partly cloudy, with a low around 65. Southwest wind 3 to 5 mph.
Partly Cloudy
Lo 65 °F Hi 76 °F Lo 61 °F Hi 72 °F Lo 60 °F Hi 79 °F Lo 62 °F Hi 83 °F Lo 65 °F

 

Tonight
 
 A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 65. Southeast wind 5 to 9 mph. Chance of precipitation is 20%.
Wednesday
 
 A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. High near 76. Southeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
 
 Showers and possibly a thunderstorm. Low around 61. Northeast wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
 
 Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 72. North wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
 Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 60. North wind 5 to 7 mph. Chance of precipitation is 60%.
Friday
 
 A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 79. North wind around 7 mph. Chance of precipitation is 20%.
Friday Night
 
 Mostly clear, with a low around 62. Calm wind.
Saturday
 
 Sunny, with a high near 83. Calm wind becoming east around 6 mph in the afternoon.
Saturday Night
 
 Partly cloudy, with a low around 65. Southwest wind 3 to 5 mph.
Sunday
 
 Partly sunny, with a high near 84. South wind 3 to 8 mph.
Sunday Night
 
 A chance of showers. Mostly cloudy, with a low around 66. South wind 3 to 6 mph. Chance of precipitation is 30%.
Monday
 
 A chance of showers. Partly sunny, with a high near 82. Southwest wind 5 to 7 mph. Chance of precipitation is 40%.
Monday Night
 
 A chance of showers. Mostly cloudy, with a low around 65. Light northwest wind. Chance of precipitation is 30%.
Tuesday
 
 Mostly sunny, with a high near 84. Northeast wind 5 to 7 mph.

 

Forecast from NOAA-NWS for Waltham MA.