National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Boston, Logan International Airport (KBOS)

Lat: 42.36°NLon: 71.01°WElev: 20ft.

A Few Clouds

70°F

21°C

Humidity 71%
Wind Speed SW 6 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 5 Aug 2:54 am EDT
Extended Forecast for

Watertown MA

  • Overnight

    Overnight: Partly cloudy, with a low around 64. Light southwest wind.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88. Southwest wind 3 to 7 mph.

    High: 88 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 70. Southwest wind around 6 mph.

    Low: 70 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers, mainly after 5pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 97. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.

    High: 91 °F

    Sunny then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 73. Southwest wind around 6 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms, mainly after 3pm. Sunny and hot, with a high near 92. West wind 5 to 7 mph. Chance of precipitation is 30%.

    High: 92 °F

    Sunny then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before 10pm. Partly cloudy, with a low around 72. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 91. Southwest wind 5 to 9 mph. Chance of precipitation is 30%.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Southwest wind around 6 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 64. Light southwest wind.
Wednesday
Mostly sunny, with a high near 88. Southwest wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 70. Southwest wind around 6 mph.
Thursday
A chance of showers, mainly after 5pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 97. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 73. Southwest wind around 6 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms, mainly after 3pm. Sunny and hot, with a high near 92. West wind 5 to 7 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers before 10pm. Partly cloudy, with a low around 72. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 91. Southwest wind 5 to 9 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Southwest wind around 6 mph. Chance of precipitation is 30%.
Sunday
Sunny and hot, with a high near 91. West wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 71. West wind 5 to 7 mph.
Monday
Sunny and hot, with a high near 91. West wind 5 to 11 mph.
Monday Night
Partly cloudy, with a low around 70. West wind 5 to 8 mph.
Tuesday
A chance of showers. Partly sunny, with a high near 87. West wind 7 to 11 mph. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown MA
 42.37°N 71.16°W (Elev. 46 ft)
Last Update:
1:06 am EDT Aug 5, 2026
Forecast Valid:
3am EDT Aug 5, 2026-6pm EDT Aug 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation