SAN YSIDRO, CA 92143 Weather Forecast & Current Conditions

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SAN DIEGO/BROWN, CA
Current Weather

8:53 AM PDT MAY 18, 2026
Overcast
Mist
63°F
Feels Like: 63°F
Dewpoint: 52°F
Rel. Hum.: 67%
Visibility: 5 miles
Wind: Calm
Pressure: 29.88 inches
Last 72 hours

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SAN YSIDRO, CA 92143
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly cloudy this morning...becoming partly cloudy. Highs 69 to 74. Areas of winds south 10 mph.
TONIGHT
Partly cloudy. Patchy fog overnight. Lows 51 to 57. Areas of winds west to 10 mph in the evening becoming light.
TUESDAY
Patchy fog in the morning. Partly cloudy. Highs 69 to 73 near the coast to 73 to 78 inland. Areas of winds west to 10 mph...becoming 10 to 15 mph in the afternoon.
TUESDAY NIGHT
Partly cloudy in the evening...becoming cloudy overnight with patchy fog. Lows 54 to 58. Areas of winds southwest 10 mph in the evening becoming light.
WEDNESDAY
Cloudy with patchy fog in the morning...becoming mostly sunny. Highs around 70 near the coast to 72 to 75 inland. Areas of winds southwest to 10 mph.
WEDNESDAY NIGHT
Mostly clear in the evening...becoming mostly cloudy. Lows 54 to 59.
THURSDAY
Mostly cloudy in the morning...becoming mostly sunny. Highs 68 to 72 near the coast to 73 to 76 inland.
THURSDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 54 to 59.
FRIDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 68 to 72 near the coast to 75 inland.
FRIDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 54 to 58.
SATURDAY
Partly cloudy. Highs 68 to 72 near the coast to 73 to 76 inland.
SATURDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 54 to 58.
SUNDAY
Partly cloudy in the morning...becoming mostly sunny. Highs around 70 near the coast to 74 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  5/17/2026
Monday
18 MAY 2026
SAN YSIDRO, CA 92143 weather forecast Day 1, 0 hours 11 PM 60° 58° Mostly Cloudy 1%

0% Thunder
( 2% severe)
S   13 84% 55°
Low 57° SAN YSIDRO, CA 92143 weather forecast Day 1, 3 hours 2 AM 59° 58° Mostly Cloudy S   8 83% 54°
High 70° SAN YSIDRO, CA 92143 weather forecast Day 1, 6 hours 5 AM 58° 58° Mostly Cloudy 1%

0% Thunder
( 0% severe)
SSE   5 83% 53°

Decreasing Clouds



SAN YSIDRO, CA 92143 weather forecast Day 1, 9 hours 8 AM 60° 61° Partly Cloudy SSE   3 78% 53°
SAN YSIDRO, CA 92143 weather forecast Day 1, 12 hours 11 AM 68° 68° Clear 0%

0% Thunder
( 0% severe)
WSW   8 59% 53°
SAN YSIDRO, CA 92143 weather forecast Day 1, 15 hours 2 PM 69° 69° Clear WSW   14 61% 55°
SAN YSIDRO, CA 92143 weather forecast Day 1, 18 hours 5 PM 67° 67° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   10 65% 55°
SAN YSIDRO, CA 92143 weather forecast Day 1, 21 hours 8 PM 62° 62° Partly Cloudy W   7 75% 54°
Tuesday
19 MAY 2026
SAN YSIDRO, CA 92143 weather forecast Day 2, 0 hours 11 PM 60° 61° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   3 81% 54°
Low 56° SAN YSIDRO, CA 92143 weather forecast Day 2, 3 hours 2 AM 58° 59° Partly Cloudy NNE   1 87% 54°
High 73° SAN YSIDRO, CA 92143 weather forecast Day 2, 6 hours 5 AM 57° 58° Partly Cloudy 0%

0% Thunder
( 0% severe)
E   2 86% 53°

Partly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 2, 9 hours 8 AM 61° 62° Partly Cloudy WNW   2 75% 53°
SAN YSIDRO, CA 92143 weather forecast Day 2, 12 hours 11 AM 71° 71° Partly Cloudy 5%

0% Thunder
( 0% severe)
W   9 55% 54°
SAN YSIDRO, CA 92143 weather forecast Day 2, 15 hours 2 PM 72° 72° Partly Cloudy W   13 59% 57°
SAN YSIDRO, CA 92143 weather forecast Day 2, 18 hours 5 PM 69° 69° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   10 66% 57°
SAN YSIDRO, CA 92143 weather forecast Day 2, 21 hours 8 PM 64° 64° Partly Cloudy W   7 78% 57°

SAN DIEGO/BROWN, CA extended weather forecast

Wednesday
20 MAY 2026
Thursday
21 MAY 2026
Friday
22 MAY 2026
Saturday
23 MAY 2026
Sunday
24 MAY 2026
Low 57° Low 57° Low 57° Low 58° Low 59°
High 75° High 72° High 72° High 71° High 72°
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
Partly Cloudy
1% Rain
Overcast
1% Rain
Overcast
Overcast
2% Rain
Overcast
4% Rain
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