Marine Weather and Tide Forecast for St. Augustine, FL

NEAR TERM
Issued at 225 PM EDT Fri May 16 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

Hot and dry conditions remain ongoing this afternoon within stacked high pressure in control across the area. High pressure ridge to our south and east has allowed a modest southwesterly flow to develop, resulting in temperatures soaring above average into the 90s essentially all the way to the coast with a sea breeze pinned just offshore. Below normal PWATs in the 1 inch range are not only curtailing any convective chances for the area today, but also limiting any sort of cloud cover as the drier air aloft mixes down diurnally. Temps top out generally in the low to mid 90s under the mostly sunny skies and offshore breezes around 10 mph. Mild lows tonight with upper 60s and low 70s common. Some patchy fog and low stratus will be possible inland with southwesterly flow advecting moisture off the gulf tonight, though given the drier than normal airmass and a bit of a breeze keeping up overnight, not confident enough to include any fog in the forecast at this time.

SHORT TERM
(Saturday through Sunday night)
Issued at 225 PM EDT Fri May 16 2025

Mostly dry weather conditions will continue on Saturday and into Sunday as high pressure ridging extends across the Florida peninsula with a potential for showers forming over southeast Georgia during the weekend, dependent on the positioning of a frontal boundary to the north and if a few weak upper level waves along with moist air extends southward into the forecast area.
High temperatures for the weekend will be in the lower to mid 90s with overnight low temperatures dropping down into the mid to upper 60s and lower 70s.

LONG TERM
(Monday through next Friday)
Issued at 225 PM EDT Fri May 16 2025

Predominantly dry weather is anticipated for Monday and Tuesday with chances for showers and storms increasing on Wednesday and Thursday as a frontal boundary presses in from out of the northwest. Drier weather conditions are expected to return by the end of the week as drier air and high pressure ridging extends over the forecast area. High temperatures for next week will start off well above the seasonal average, with max temps reaching into the mid to upper 90s, with temps experiencing a slight cooling trend after midweek and becoming closer to the seasonal average by the end of the week.

AVIATION
(00Z TAFS)
Issued at 727 PM EDT Fri May 16 2025

Mainly VFR conditions with WSW winds prevail through the period.
Patchy fog and low stratus will be possible at VQQ and GNV between 08-12Z lowering VSBYs to MVFR. Brief IFR/LIFR ceilings will be possible with the stratus. WSW winds increase to around 10 kts after 15Z.

MARINE
Issued at 225 PM EDT Fri May 16 2025

High pressure will remain in control across local waters through the weekend and into the start of next week as ridging over the Florida Peninsula moves very little. A weakening cold front will approach GA waters Sunday afternoon, though stall north of all waters with very little chances for showers and/or thunderstorms continuing. High pressure looks to hold across the area through early next week before our next front approaches mid week.

Rip Currents: Rip current risk is low at area beaches at time through Saturday.

FIRE WEATHER
Issued at 344 AM EDT Fri May 16 2025

A dry and increasingly hot air mass will result in minimum relative humidity values falling to the 30-35 percent range at most locations today and again on Saturday. Breezy westerly transport winds will create good daytime dispersion values this afternoon. Westerly transport winds will strengthen even further on Saturday and will combine with elevated mixing heights to create high to very high daytime dispersion values on Saturday and Sunday. The Atlantic sea breeze should remain pinned to the east of I-95 through the mid to late afternoon hours today and again on Saturday, with this boundary expected to push further inland on Sunday afternoon.

CLIMATE
Issued at 225 PM EDT Fri May 16 2025

Daily record high temperatures were broken today (5/16) at Jacksonville and Craig.

Record High Temperatures at climate sites through early next week:

Saturday May 17: KJAX: 96/1995 KCRG: 93/2001 KAMG: 94/2001 KGNV: 96/1915

Sunday May 18: KJAX: 96/1899 KCRG: 93/2001 KAMG: 95/2001 KGNV: 97/1930

Monday May 19: KJAX: 97/1960 KCRG: 95/2022 KAMG: 97/1960 KGNV: 99/1899

PRELIMINARY POINT TEMPS/POPS
AMG 69 92 70 92 / 0 10 20 20 SSI 71 91 74 89 / 0 10 10 10 JAX 68 96 69 96 / 0 10 0 10 SGJ 70 95 69 93 / 0 10 0 0 GNV 67 94 67 95 / 0 10 0 0 OCF 67 93 67 94 / 0 10 0 0

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