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

Hazardous Weather Conditions

Current conditions at

Boston, Logan International Airport (KBOS)

Lat: 42.36°NLon: 71.01°WElev: 20ft.

A Few Clouds

83°F

28°C

Humidity 70%
Wind Speed S 7 mph
Barometer 30.05 in (1017.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 15 Jul 10:54 am EDT
Extended Forecast for

Watertown MA

Heat Advisory until July 17, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until July 17, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • This Afternoon

    High: 91 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 72. South wind 3 to 6 mph.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 93. Heat index values as high as 99. Southwest wind 3 to 7 mph.

    High: 93 °F

    Hot

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 75. Southwest wind around 7 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Partly sunny and hot, with a high near 91. Southwest wind 6 to 10 mph. Chance of precipitation is 50%.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 77. Southwest wind around 7 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 89. West wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66. North wind 3 to 5 mph.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 91. Heat index values as high as 96. South wind around 6 mph.
Tonight
Mostly clear, with a low around 72. South wind 3 to 6 mph.
Wednesday
Mostly sunny and hot, with a high near 93. Heat index values as high as 99. Southwest wind 3 to 7 mph.
Wednesday Night
A slight chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 75. Southwest wind around 7 mph. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms. Partly sunny and hot, with a high near 91. Southwest wind 6 to 10 mph. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 77. Southwest wind around 7 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 89. West wind 6 to 8 mph. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 66. North wind 3 to 5 mph.
Saturday
Sunny, with a high near 82. North wind 5 to 7 mph becoming east in the afternoon.
Saturday Night
Partly cloudy, with a low around 66. Southwest wind 3 to 6 mph.
Sunday
A chance of showers. Partly sunny, with a high near 83. Light southwest wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 68. West wind around 6 mph. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 82. West wind 6 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Watertown MA
 42.37°N 71.16°W (Elev. 46 ft)
Last Update:
7:45 am EDT Jul 15, 2025
Forecast Valid:
12pm EDT Jul 15, 2025-6pm EDT Jul 21, 2025
 
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