SAN YSIDRO, CA 92143 Weather Forecast & Current Conditions

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SAN DIEGO/BROWN, CA
Current Weather

5:53 PM PDT AUG 31, 2026
Clear
75°F
Feels Like: 75°F
Dewpoint: 63°F
Rel. Hum.: 66%
Visibility: 10 miles
Wind: Variable at 7 mph
Pressure: 29.91 inches
Last 72 hours

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SAN YSIDRO, CA 92143
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear this evening...becoming partly cloudy. Lows 60 to 66. Areas of winds west to 10 mph this evening becoming light.
TUESDAY
Mostly sunny. Highs 75 to 79 near the coast to 80 to 84 inland. Areas of winds northwest to 10 mph becoming west with gusts to 25 mph in the afternoon.
TUESDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 59 to 66. Areas of winds north to 10 mph.
WEDNESDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 74 to 79 near the coast to 79 to 83 inland. Areas of winds north to 10 mph becoming west in the afternoon.
WEDNESDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 59 to 65. Areas of winds northwest 10 mph in the evening becoming light.
THURSDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 74 to 78 near the coast to 78 to 82 inland.
THURSDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 60 to 65.
FRIDAY
Partly cloudy. Highs 74 to 79 near the coast to 79 to 83 inland.
FRIDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 62 to 67.
SATURDAY
Partly cloudy with a slight chance of showers. Highs 75 to 80 near the coast to 80 to 84 inland.
SATURDAY NIGHT
Mostly cloudy with a slight chance of showers. Lows 65 to 69.
SUNDAY
Mostly cloudy in the morning...becoming partly cloudy. A slight chance of showers. Highs 77 to 82 near the coast to 84 to 88 inland.
SUNDAY NIGHT
Partly cloudy with a slight chance of showers. Lows around 70.

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 AM MDT  8/31/2026
Monday
31 AUG 2026
SAN YSIDRO, CA 92143 weather forecast Day 1, 12 hours 11 AM 78° 80° Clear 0%

0% Thunder
( 0% severe)
W   8 64% 65°
High 80° SAN YSIDRO, CA 92143 weather forecast Day 1, 15 hours 2 PM 79° 81° Clear W   12 62% 65°
Clear



SAN YSIDRO, CA 92143 weather forecast Day 1, 18 hours 5 PM 76° 78° Clear 0%

0% Thunder
( 0% severe)
W   12 66% 64°
SAN YSIDRO, CA 92143 weather forecast Day 1, 21 hours 8 PM 70° 70° Clear WNW   7 78% 63°
Tuesday
1 SEP 2026
SAN YSIDRO, CA 92143 weather forecast Day 2, 0 hours 11 PM 68° 68° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   6 84% 63°
Low 66° SAN YSIDRO, CA 92143 weather forecast Day 2, 3 hours 2 AM 67° 67° Partly Cloudy N   5 87% 63°
High 79° SAN YSIDRO, CA 92143 weather forecast Day 2, 6 hours 5 AM 66° 66° Partly Cloudy 1%

0% Thunder
( 0% severe)
NNE   3 93% 64°

Partly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 2, 9 hours 8 AM 67° 67° Partly Cloudy N   5 90% 64°
SAN YSIDRO, CA 92143 weather forecast Day 2, 12 hours 11 AM 76° 78° Clear 2%

0% Thunder
( 0% severe)
WNW   8 64% 63°
SAN YSIDRO, CA 92143 weather forecast Day 2, 15 hours 2 PM 78° 80° Partly Cloudy W   13 58% 62°
SAN YSIDRO, CA 92143 weather forecast Day 2, 18 hours 5 PM 75° 75° Clear 0%

0% Thunder
( 0% severe)
WNW   12 66% 63°
SAN YSIDRO, CA 92143 weather forecast Day 2, 21 hours 8 PM 69° 69° Clear WNW   10 78% 62°
Wednesday
2 SEP 2026
SAN YSIDRO, CA 92143 weather forecast Day 3, 0 hours 11 PM 68° 68° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   9 81% 62°
Low 65° SAN YSIDRO, CA 92143 weather forecast Day 3, 3 hours 2 AM 66° 66° Partly Cloudy NNW   6 87% 62°
High 79° SAN YSIDRO, CA 92143 weather forecast Day 3, 6 hours 5 AM 65° 65° Partly Cloudy 0%

0% Thunder
( 0% severe)
N   5 90% 62°

Partly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 3, 9 hours 8 AM 66° 66° Partly Cloudy N   6 87% 62°
SAN YSIDRO, CA 92143 weather forecast Day 3, 15 hours 11 AM 76° 78° Clear 0%

0% Thunder
( 0% severe)
WNW   8 60% 61°
SAN YSIDRO, CA 92143 weather forecast Day 3, 18 hours 2 PM 78° 80° Clear WNW   12 56% 61°
SAN YSIDRO, CA 92143 weather forecast Day 3, 21 hours 5 PM 75° 75° Clear     WNW   12 62% 61°

SAN DIEGO/BROWN, CA extended weather forecast

Thursday
3 SEP 2026
Friday
4 SEP 2026
Saturday
5 SEP 2026
Sunday
6 SEP 2026
Monday
7 SEP 2026
Low 61° Low 61° Low 63° Low 69° Low 65°
High 78° High 77° High 80° High 82° High 81°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
3% Rain
Partly Cloudy
3% Rain
Mostly Cloudy
23% Rain
Mostly Cloudy
71% Rain
Overcast
51% Rain
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