Marine Weather and Tide Forecast for St. Augustine Beach, FL

NEAR TERM
(Through Tonight)
Issued at 220 PM EDT Tue Apr 22 2025

For the latest NE FL and SE GA Daily Key Messages please visit: https:// www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf

A weak surface ridge axis will be across the north FL peninsula and flow aloft remains southwesterly. A shortwave will approach the area through tonight but airmass and moisture are generally not supportive of mentioning precip. However, a shower or two (about 10 percent chances) will be possible over southeast GA this evening. Highs today will reach into the mid and upper 80s, with lower 80s at the coast. Meanwhile, scattered cumulus will dissipate this evening but high clouds are likely to continue tonight. Some patchy fog is forecast late tonight for inland areas. Lows tonight in the 60s expected.

SHORT TERM
(Wednesday through Thursday night)
Issued at 220 PM EDT Tue Apr 22 2025

Hot temperatures continue Wednesday and Thursday, with inland highs reaching the mid 80s to lower 90s, with the Atlantic sea breeze keeping the coast a few degrees cooler both days. Low temperatures will be mild in the 60s, with near 70 degrees along the coast and St. Johns river basin.

Precipitation chances will be mainly north of I-10 both Wednesday and Thursday as a front remains stalled north of the forecast area. With solid daytime heating and a sea breeze formation, isolated thunderstorms are likely in the afternoons and evenings.
Wednesday looks like a better opportunity for stronger to isolated severe storm formation, with CAMs highlighting southeast Georgia, as well as north central Florida (west of the St. Johns river basin) through the evening. Strong winds and hail will be the primary threats with any strong or isolated severe thunderstorm development due to relatively steep mid level lapse rates.

LONG TERM
(Friday through next Tuesday)
Issued at 220 PM EDT Tue Apr 22 2025

Above average temperatures will continue through the weekend, again with the Atlantic sea breeze keeping the coast a little bit cooler than inland locations. Showers and isolated thunderstorms will be possible over southeast Georgia on Friday and Saturday as a cold front approaches. The front will move through the area on Sunday, bringing rain chances of 20-30% across NE FL and SE GA along with isolated thunderstorms. Behind the front, temperatures will return to near normal for the start of next week.

AVIATION
(06Z TAFS)
Issued at 148 AM EDT Wed Apr 23 2025

MVFR fog developing after 07-08Z at VQQ and GNV with restrictions for IFR fog at GNV 08Z-11Z. VFR conditions will prevail after 12Z as the region will be between weak high pressure in the Atlantic and a stalled cold front to the north. Strong heating and weak pressure pattern will allow the Atlantic seabreeze to move onshore by midday and through the duval TAF sites through the early afternoon before encountering Gulf coast seabreeze just west of GNV.

Isolated to scattered T'storms will remain northwest of the sites this afternoon where additional lift, moisture across GA and instability from a disturbance aloft combine, but probability much too low near KSSI for any VCSH or VCTS. Strongest winds along SSI/SGJ 10-12 knots and 8-10 knots inland this afternoon behind seabreeze passage turning winds easterly. A few debris clouds may drift over SSI to end the period with winds diminishing to 5-8 knots from the southeast.

MARINE
Issued at 220 PM EDT Tue Apr 22 2025

Little change in the ongoing marine forecast with southeast to south winds up to 10-15 kt and seas of about 2-4 ft much of the week. There is a slight increase in the combined sea heights by Thu night into Friday, but for most part seas stay in the 2-4 ft/2-3 ft range with dominant periods of 5 to 9 seconds. A further increase in winds and seas will be possible over the weekend as a backdoor front moves into the region.

Rip Currents: A moderate risk of rip currents is in effect for Northeast Florida and Southeast Georgia beaches rest of today and Wednesday due to the onshore winds and surf 2-3 feet. Stronger rip currents can form near piers and jetties. Always swim near a lifeguard.

CLIMATE
Issued at 220 PM EDT Tue Apr 22 2025

DAILY RECORD HIGHS

WED 4/23 THU 4/24 FRI 4/25

JAX 92 (1970) 93 (1999) 92 (1958)

GNV 92 (1970) 94 (1999) 93 (1896)

AMG 94 (1968) 93 (1999) 91 (1958)

CRG 89 (2020) 92 (1999) 91 (2006)

PRELIMINARY POINT TEMPS/POPS
AMG 87 62 85 62 / 50 30 40 10 SSI 79 68 79 68 / 10 20 10 10 JAX 86 65 85 63 / 10 10 10 0 SGJ 82 66 82 65 / 0 10 0 0 GNV 90 62 89 61 / 20 10 10 0 OCF 91 63 90 61 / 10 10 0 0

JAX WATCHES/WARNINGS/ADVISORIES
FL...None.
GA...None.
AM...None.