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Sunnyvale, CA Marine Weather Forecast

This Afternoon - 57°F
Dec 22, 2025
3 mph WNW
Chance Light Rain
A chance of rain. Mostly cloudy, with a high near 57. West northwest wind around 3 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Tonight - 54°F
Dec 22, 2025
1 to 6 mph SSW
Chance Light Rain
A chance of rain. Cloudy, with a low around 54. South southwest wind 1 to 6 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Tuesday - 58°F
Dec 23, 2025
7 to 22 mph SSE
Rain Likely
Rain likely. Cloudy, with a high near 58. South southeast wind 7 to 22 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night - 52°F
Dec 23, 2025
23 to 29 mph SSE
Rain
Rain. Cloudy, with a low around 52. South southeast wind 23 to 29 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday - 56°F
Dec 24, 2025
9 to 23 mph S
Light Rain then Showers And Thunderstorms
Rain before 4pm, then showers and thunderstorms. Cloudy, with a high near 56. South wind 9 to 23 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday Night - 51°F
Dec 24, 2025
20 to 28 mph SSE
Showers And Thunderstorms
Showers and thunderstorms before 7pm, then rain between 7pm and 4am, then showers and thunderstorms. Cloudy, with a low around 51. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Christmas Day - 54°F
Dec 25, 2025
22 to 35 mph S
Showers And Thunderstorms
Showers and thunderstorms before 7am, then rain between 7am and 1pm, then showers and thunderstorms. Cloudy, with a high near 54.
Thursday Night - 49°F
Dec 25, 2025
20 to 36 mph S
Showers And Thunderstorms
Showers and thunderstorms before 4am, then rain. Cloudy, with a low around 49.
Friday - 50°F
Dec 26, 2025
17 to 24 mph SSW
Light Rain
Rain. Mostly cloudy, with a high near 50.
Friday Night - 45°F
Dec 26, 2025
5 to 21 mph WNW
Light Rain Likely
Rain likely before 4am. Mostly cloudy, with a low around 45.
Saturday - 50°F
Dec 27, 2025
3 to 9 mph N
Mostly Sunny
Mostly sunny, with a high near 50.
Saturday Night - 41°F
Dec 27, 2025
3 to 9 mph NNE
Mostly Clear
Mostly clear, with a low around 41.
Sunday - 50°F
Dec 28, 2025
3 to 8 mph NNE
Sunny
Sunny, with a high near 50.
Sunday Night - 42°F
Dec 28, 2025
5 to 8 mph NE
Mostly Clear
Mostly clear, with a low around 42.

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