St. Augustine Beach Weather Forecast
- 79
- 86
Slight Chance Thunderstorms
- 79
- 85
Rain Showers Likely
- 78
- 83
Rain Showers Likely
- 77
- 82
Rain Showers Likely
- 76
- 84
Chance Thunderstorms
- 76
- 85
Chance Thunderstorms
Today 14 Sep Southeast Coastal St. Johns
Sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs around 90. Northwest Winds around 5 Mph, becoming northeast this afternoon. Chance of rain 20 percent. Heat index Values up to 105.
Tonight 14 Sep Southeast Coastal St. Johns
Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 70s. Southeast Winds around 5 Mph, becoming northeast after midnight.
St. Augustine Beach Temperature Statistics
September Temperature
Northeast Florida Regional Airport (8.1 miles)
Lowest 7 September, 2026
73.9 °FAverage September
80.9 °FHighest 6 September, 2026
89.1 °F
Climate (2021–2026)
Northeast Florida Regional Airport (8.1 miles)
Average Low 2021–2026
63.7 °FAverage 2021–2026
70.8 °FAverage High 2021–2026
78.1 °F