Water temperature · Florida
St. Augustine Beach water temperature
74°F23°C
No reading from the sensor in the last 12 hours: see the satellite reading.
Read Oct 30, 11:26 AM EDT at St. Augustine, FL (194), 15 mi NE
The sea is 5°F cooler than usual for late October.
- Comfortable for most swimmers
The last 35 days
Daily satellite sea-surface temperature (NASA MUR, 1 km) at the nearest ocean point, 0.3 mi from town. Satellites read the top millimeter of water; a sensor a few feet down can differ by a degree or two.
St. Augustine Beach water temperature by month
Warmest in August (83°F on average), coolest in February (61°F). The water averages 75°F or more from May to October.
Bars: the 2016–2025 average of each month (outlined: this month). Lines: the coolest and warmest year’s monthly average.
Month-by-month numbers and what to wear
| Month | Average | In the water |
|---|---|---|
| January | 61°F 16°C | Cold: a 3/2 mm full wetsuit |
| February | 61°F 16°C | Cold: a 3/2 mm full wetsuit |
| March | 64°F 18°C | Cold: a 3/2 mm full wetsuit |
| April | 70°F 21°C | Cool: a 2 mm shorty or spring suit |
| May | 76°F 25°C | Comfortable for most swimmers |
| June | 81°F 27°C | Warm: a swimsuit is plenty |
| July | 83°F 28°C | Warm: a swimsuit is plenty |
| August | 83°F 28°C | Warm: a swimsuit is plenty |
| September | 83°F 28°C | Warm: a swimsuit is plenty |
| October | 78°F 26°C | Comfortable for most swimmers |
| November | 71°F 22°C | Cool: a 2 mm shorty or spring suit |
| December | 65°F 18°C | Cold: a 3/2 mm full wetsuit |
Tides at St. Augustine Beach
Low tide leaves more beach; the water near shore warms fastest on a sunny incoming tide over the flats.
Questions
What is the water temperature in St. Augustine Beach today?
The nearest sensor, St. Augustine, FL (194) (15 mi away), read 74°F at Oct 30, 11:26 AM EDT. This page updates every hour.
Is the water warmer or colder than usual?
The satellite reading on Oct 28 was 71°F, 5°F cooler than usual for late October (75°F is the 2016–2025 average for the date).
When is the water warmest in St. Augustine Beach?
August, at about 83°F on average (2016–2025).
Is the water warm enough to swim in October?
The October average is 78°F: comfortable for most swimmers.
Where the readings come from
The live reading is from St. Augustine, FL (194) (NOAA NDBC buoy 41117), 15 mi NE of St. Augustine Beach, checked every hour. The daily and monthly figures are NASA JPL’s Multi-scale Ultra-high Resolution (MUR) sea-surface temperature, a 1 km satellite analysis, read through NOAA CoastWatch. All sources