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.

Overcast

70°F

21°C

Humidity 87%
Wind Speed SW 12 mph
Barometer 30.09 in (1018.8 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 14 Jul 5:54 am EDT
Extended Forecast for

Watertown MA

  • Today

    Today: A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 85. South wind 3 to 7 mph. Chance of precipitation is 30%.

    High: 85 °F

    Patchy Fog
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 72. Southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Chance
    T-storms then
    Slight Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 89. Heat index values as high as 95. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72. Southwest wind 3 to 5 mph.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 92. Southwest wind 3 to 7 mph.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 74. Southwest wind 5 to 7 mph.

    Low: 74 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after 11am. Partly sunny and hot, with a high near 90. Southwest wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 90 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers before 9pm. Mostly cloudy, with a low around 75. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: A chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. West wind around 7 mph. Chance of precipitation is 30%.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 85. South wind 3 to 7 mph. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 72. Southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A slight chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 89. Heat index values as high as 95. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 72. Southwest wind 3 to 5 mph.
Wednesday
Mostly sunny and hot, with a high near 92. Southwest wind 3 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 74. Southwest wind 5 to 7 mph.
Thursday
A chance of showers and thunderstorms after 11am. Partly sunny and hot, with a high near 90. Southwest wind 6 to 8 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 9pm. Mostly cloudy, with a low around 75. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.
Friday
A chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. West wind around 7 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 10pm. Mostly cloudy, with a low around 70. Northwest wind 3 to 5 mph. Chance of precipitation is 30%.
Saturday
Mostly 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. Southeast wind around 5 mph becoming light and variable in the evening.
Sunday
Partly sunny, with a high near 83. South wind 3 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown MA
 42.38°N 71.19°W (Elev. 98 ft)
Last Update:
2:05 am EDT Jul 14, 2025
Forecast Valid:
6am EDT Jul 14, 2025-6pm EDT Jul 20, 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