SAN YSIDRO, CA 92143 Weather Forecast & Current Conditions

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SAN DIEGO/BROWN, CA
Current Weather

2:53 AM PDT SEP 29, 2026
Broken Clouds
61°F
Feels Like: 61°F
Dewpoint: 57°F
Rel. Hum.: 87%
Visibility: 10 miles
Wind: NE at 5 mph
Pressure: 29.74 inches
Last 72 hours

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SAN YSIDRO, CA 92143
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly sunny. Highs 76 to 81 near the coast to 80 to 84 inland. Light winds becoming west 10 to 15 mph with gusts to 25 mph this afternoon.
TONIGHT
Mostly clear in the evening...becoming mostly cloudy overnight with patchy fog. Lows 62 to 67. Areas of winds south 10 mph with gusts to 25 mph in the evening becoming light.
WEDNESDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 76 to 80 near the coast to 81 to 84 inland. Areas of winds southeast 10 mph becoming southwest in the afternoon.
WEDNESDAY NIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 62 to 66. Light winds.
THURSDAY
Partly cloudy with patchy fog in the morning... Becoming mostly sunny. Highs 77 to 82 near the coast to 84 to 87 inland. Light winds becoming west 10 mph in the afternoon.
THURSDAY NIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 65 to 68.
FRIDAY
Partly cloudy with patchy fog in the morning...becoming mostly sunny. Highs 82 to 87 near the coast to 90 to 94 inland.
FRIDAY NIGHT
Mostly clear. Lows around 70.
SATURDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 85 to 90 near the coast to 94 to 97 inland.
SATURDAY NIGHT
Mostly clear. Lows around 72.
SUNDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 87 to 92 near the coast to 97 inland.
SUNDAY NIGHT
Mostly clear. Lows around 73.
MONDAY
Mostly sunny. Highs 86 to 91 near the coast to 95 to 98 inland.

Visible Weather Satellite
SAN YSIDRO, CA 92143
Infrared Weather Satellite
SAN YSIDRO, CA 92143
NEXRAD Weather Radar
SAN YSIDRO, CA 92143

SAN DIEGO/BROWN, CA 3 hourly weather forecast

weather forecast created  6:00 PM MDT  9/28/2026
Tuesday
29 SEP 2026
SAN YSIDRO, CA 92143 weather forecast Day 1, 0 hours 11 PM 64° 64° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   6 90% 61°
Low 63° SAN YSIDRO, CA 92143 weather forecast Day 1, 3 hours 2 AM 64° 64° Partly Cloudy SE   6 87% 60°
High 78° SAN YSIDRO, CA 92143 weather forecast Day 1, 6 hours 5 AM 64° 65° Clear 0%

0% Thunder
( 0% severe)
E   5 81% 58°

Clear



SAN YSIDRO, CA 92143 weather forecast Day 1, 9 hours 8 AM 64° 64° Clear E   6 78% 57°
SAN YSIDRO, CA 92143 weather forecast Day 1, 12 hours 11 AM 75° 75° Clear 0%

0% Thunder
( 0% severe)
WNW   6 55% 58°
SAN YSIDRO, CA 92143 weather forecast Day 1, 15 hours 2 PM 77° 79° Clear W   12 54% 59°
SAN YSIDRO, CA 92143 weather forecast Day 1, 18 hours 5 PM 75° 75° Clear 0%

0% Thunder
( 0% severe)
W   9 60% 60°
SAN YSIDRO, CA 92143 weather forecast Day 1, 21 hours 8 PM 69° 69° Clear WSW   1 76% 61°
Wednesday
30 SEP 2026
SAN YSIDRO, CA 92143 weather forecast Day 2, 0 hours 11 PM 67° 67° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   9 78% 60°
Low 65° SAN YSIDRO, CA 92143 weather forecast Day 2, 3 hours 2 AM 66° 66° Partly Cloudy SSE   7 78% 59°
High 81° SAN YSIDRO, CA 92143 weather forecast Day 2, 6 hours 5 AM 66° 66° Partly Cloudy 0%

0% Thunder
( 0% severe)
SE   5 75% 58°

Partly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 2, 9 hours 8 AM 67° 67° Partly Cloudy SE   7 70% 57°
SAN YSIDRO, CA 92143 weather forecast Day 2, 12 hours 11 AM 78° 79° Clear 0%

0% Thunder
( 0% severe)
WSW   3 52% 59°
SAN YSIDRO, CA 92143 weather forecast Day 2, 15 hours 2 PM 80° 81° Clear W   10 56% 63°
SAN YSIDRO, CA 92143 weather forecast Day 2, 18 hours 5 PM 76° 78° Clear 0%

0% Thunder
( 0% severe)
W   8 64% 63°
SAN YSIDRO, CA 92143 weather forecast Day 2, 21 hours 8 PM 69° 69° Clear WNW   1 84% 64°

SAN DIEGO/BROWN, CA extended weather forecast

Thursday
1 OCT 2026
Friday
2 OCT 2026
Saturday
3 OCT 2026
Sunday
4 OCT 2026
Monday
5 OCT 2026
Low 60° Low 61° Low 61° Low 63° Low 65°
High 81° High 86° High 94° High 93° High 95°
SAN YSIDRO, CA 92143 weather forecast Day 3 SAN YSIDRO, CA 92143 weather forecast Day 4 SAN YSIDRO, CA 92143 weather forecast Day 5 SAN YSIDRO, CA 92143 weather forecast Day 6 SAN YSIDRO, CA 92143 weather forecast Day 7
Mostly Cloudy
Partly Cloudy
Clear
Clear
Clear
3% Rain
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