Measurements:
°C
°F
CURRENT WEATHER
18:15
San Antonio
54°F
NE 7 mph
Feels like: 52°F
Precip: 15%
World Resorts Chile San Antonio Weather

7 Day Weather Forecast

09.08
tue
DAY
52°F
NE 9 mph
precip
6%
NIGHT
52°F
N 7 mph
precip
22%
09.09
wed
DAY
54°F
NE 9 mph
precip
8%
NIGHT
52°F
N 9 mph
precip
27%
09.10
thu
DAY
56°F
NE 9 mph
precip
24%
NIGHT
54°F
N 9 mph
precip
24%
09.11
fri
DAY
56°F
N 7 mph
precip
18%
NIGHT
52°F
N 13 mph
precip
15%
09.12
sat
DAY
52°F
NE 6 mph
precip
24%
NIGHT
52°F
N 5 mph
precip
7%
09.13
sun
DAY
58°F
NE 5 mph
precip
4%
NIGHT
54°F
N 8 mph
precip
6%
09.14
mon
DAY
58°F
N 13 mph
precip
6%
NIGHT
58°F
N 8 mph
precip
13%

San Antonio Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for San Antonio was 12.9°F. The maximum and minimum values were 12.2°F and 13.4°F respectively.

San Antonio on the Weather Map

Best Time to Visit San Antonio
The most sunny months:
January 29 days
March 28 days
December 28 days
The most warm months:
February 70.1 °F
January 69.1 °F
March 68.7 °F
Warmest sea temperature:
February 63.1 °F
January 61.9 °F
March 61.3 °F
The most cold months:
August 57.3 °F
July 57.3 °F
June 58.4 °F
The most rainy months:
June 3 days
July 2 days
August 1 day
The most windy months:
October 8 mph
September 8 mph
December 8 mph
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