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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

Lat: 37.66083°NLon: 122.11833°WElev: 46.0ft.

Overcast

62°F

17°C

Humidity 83%
Wind Speed WSW 9 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 17 Aug 02:54 AM PDT
Extended Forecast for

San Lorenzo CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 60. Southwest wind around 8 mph.

    Low: 60 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 67. West wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 67 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 58. West wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 69. West southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 69 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. Southwest wind 5 to 13 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 60. Southwest wind around 8 mph.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 67. West wind 8 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly cloudy, with a low around 58. West wind 7 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 69. West southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 57. Southwest wind 5 to 13 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Lorenzo CA
 37.68°N 122.16°W (Elev. 13 ft)
Last Update:
2:33 am PDT Aug 17, 2025
Forecast Valid:
3am PDT Aug 17, 2025-6pm PDT Aug 23, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation