St. Augustine weather in August
August in St. Augustine: sweltering, rainy, with clean air — a gamble, with 37°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#12 of 12 months in St. Augustine · #1092 of 1413 destinations to visit in August · comfort 60/100 (tier C)
- Days
- 31°C
- Nights
- 25°C
- Wet days
- 16
- Sun
- 10.9 h
- Humidity
- 83%
- Daylight
- 13 h

Traveller notes on St. Augustine in August
Other months in St. Augustine
Regulars describe a genuine day-to-night split as typical this month - shorts and beach weather comfortable right up until sundown, then long pants, a sweater or light jacket needed once temperatures drop after dark. Our row backs that mild, still-dry read, 23.5C over 15.4C nights, with rain light at 58.3mm across 6.4 days and humidity at 76 percent. Regulars are consistent this counts among the most comfortable stretches of the year here, crowds noticeably thinner than peak season with the beach itself often close to empty, ideal for long walks. The sea sits at 21.5C, still comfortably swimmable for many despite the cooling air. The record: 8.3 hours of sun, a 20.1 kph wind and AQI 45.
St. Augustine-forum threads on January weather describe a genuinely mixed bag day to day, a run of 70-degree, t-shirt afternoons entirely plausible right alongside a cold snap that drops nights into the 30s and demands a real winter jacket. Posters are consistent this is the dry season locally, plenty of sun overall even when a cold front rolls through, and that packing layers rather than betting on one type of weather is the only reliable strategy. Swimming is firmly off the table for all but the hardiest visitors, the water itself far colder than it looks on a sunny day. The historic district and its walkable streets stay comfortable for sightseeing regardless of which version of January weather shows up. Regulars call it a genuinely good value month, thin winter crowds without the true depths of a northern winter. The record: 18.9C days feeling like 17C, 9.3C nights, a 18.2C sea, 73 percent humidity and 7.7 hours of sun.
St. Augustine-forum threads on July weather confirm it's hot and humid, daytime highs regularly near 90 Fahrenheit with afternoon thunderstorms a near-daily fixture. Posters describe the rain as heavy but brief rather than an all-day event, typically a hard downpour that clears within an hour or so. The standing local strategy repeated across threads is to front-load sightseeing for the morning, then treat the beach as an afternoon activity starting around 3 or 4pm, deliberately avoiding the 2-to-3pm window widely called the hottest stretch of the day. The historic district's narrow streets offer some shade, but posters still recommend frequent water breaks and pacing walking tours around the heat rather than pushing through midday. The record: 31C days feeling like a punishing 38C, 24.4C nights, 123mm across 13.1 days, a 29.3C sea, 83 percent humidity and 11.7 hours of sun.
February in St Augustine runs from the 40s to the 70s Fahrenheit with little rain, and the shape of the day is the useful part: cool mornings, especially early in the month, warming enough that a windbreaker at nine can become shorts by the afternoon. Regulars give averages of 69F and 48F against our row's 21.1C and 11.3C, with 42mm across 4.7 days. It is also one of the quieter months - schools are in session and the Christmas crowds are long gone - which is the main reason they recommend it. The ocean sits at 64 to 72F, our row saying 18.8C, and the wind takes the edge off that further. The record: humidity 79 percent, 8.7 hours of sun and a 19.9 kph wind.
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St. Augustine climate normals — August
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in St. Augustine in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer break in United States, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for St. Augustine's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherSt. Augustine's weather peaks February–April, best around March.
August coincides with Hurricane season.
Best weatherFair weatherToughest weather
What's on in St. Augustine in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Sea turtle nesting
1 May – 31 OctLoggerheads nest along the county's beaches from May, with hatchlings running into October. Beach driving is restricted and the dune-line lighting rules are enforced through the whole season. Source ↗
- Hazard
Hurricane season
1 Jun – 30 NovThe Atlantic season runs June to November. The old town sits barely above the Matanzas and has flooded to the doorsteps twice in the last decade, from storms that never made landfall here. Source ↗
- Hazard
Summer heat
15 Jun – 10 Sep · usuallyExtreme heatHot and heavy with an afternoon storm most days, and the narrow old streets hold it. The fort and the walking tours are morning things in these months, whatever the schedule says. Source ↗
Nearby, and something's on
Within 300 km of St. Augustine — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is St. Augustine?
St. Augustine in August — FAQ
- Is August a good time to visit St. Augustine?
- August in St. Augustine: sweltering, rainy, with clean air — a gamble, with 37°C afternoons. It ranks #12 of 12 months for St. Augustine on SeasonMap's comfort score (60/100).
- What is the weather like in St. Augustine in August?
- In August, St. Augustine averages a daily high of 30.7°C and a low of 24.6°C, with about 141.1 mm of rain over roughly 15.5 rainy days.
- What is the air quality in St. Augustine in August?
- St. Augustine has a mean US Air Quality Index of about 49 in August.
Within 300 km: Jacksonville's Loggerhead nesting on 1 May – 31 Oct, and Clearwater's Sea turtle nesting on 1 May – 31 Oct.