Marine Weather Net

Fernandina Beach to St. Augustine, FL 20 - 60 NM Marine Forecast


TONIGHT

W
WINDS
15
KNOTS

THURSDAY

W
WINDS
20
KNOTS

THURSDAY NIGHT

W
WINDS
10 - 15
KNOTS

FRIDAY

WSW
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
AMZ472 Forecast Issued: 125 PM EST Wed Dec 31 2025

SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 10 PM TO 11 PM EST THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EST THIS EVENING THROUGH THURSDAY MORNING
Tonight...West Winds Around 15 Knots, Increasing To Around 20 Knots Towards Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northwest 5 Feet At 5 Seconds And Northeast 2 Feet At 8 Seconds.
Thursday...West Winds Around 20 Knots, Diminishing To Around 15 Knots During The Afternoon. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northwest 5 Feet At 5 Seconds And Northeast 2 Feet At 8 Seconds.
Thursday Night...West Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: West 3 Feet At 4 Seconds.
Friday...West Southwest Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: West 2 Feet At 4 Seconds.
Friday Night...Southwest Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: Southwest 3 Feet At 4 Seconds.
Saturday...Southwest Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Southwest 5 Feet At 5 Seconds. Showers Likely With A Slight Chance Of Thunderstorms In The Afternoon.
Saturday Night...West Winds 20 To 25 Knots, Becoming Northwest After Midnight. Seas 4 To 6 Feet, Occasionally ...Small Craft Exercise Caution In Effect From Thursday Morning Through Thursday Evening... To 8 Feet. Showers With A Slight Chance Of Thunderstorms.
Sunday...North Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. A Chance Of Showers In The Morning.
Sunday Night And Monday...North Northeast Winds Around 15 Knots, Decreasing To Around 10 Knots During The Afternoon. Seas 3 To 4 Feet, Occasionally To 5 Feet. Winds And Seas Higher In And Near Thunderstorms.
SHARE THIS PAGE:           
Area Forecast Discussion
National Weather Service Jacksonville FL
648pm EST Wednesday Dec 31 2025

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

- Light Freeze and Widespread Frost Late Tonight through Early Thursday. Freeze Warning for Inland Southeast GA, Northeast & North Central FL. Frost Advisory for Coastal Southeast GA, Locations Along & West of I-95 in Northeast FL

- Small Craft Advisory Tonight for the Offshore Coastal Waters

- Isolated TStorms & Beneficial Rainfall Saturday and Saturday Night

.NEAR TERM /UNTIL 7am THURSDAY MORNING/... Clear skies are expected for Tonight. Light west winds are expected, with temperatures once again well below average. A widespread inland freeze with frost are expected, with frost potential along coastal counties.

.SHORT TERM /7am THURSDAY MORNING THROUGH FRIDAY NIGHT/... Early morning frost developments will continue through the end of the week with freezing conditions lessening on Friday as high pressure moves further east and prevailing flow shifts to become more out of the southwest ahead of an advancing cold front pressing in from out of the northwest, with chances for convection increase over inland southeast Georgia during the overnight hours on Friday. Temperatures will warm to the seasonal average with daily max temps rising into the mid to upper 60s by Friday with overnight low temperatures similarly rising into the upper 40s and lower 50s before the weekend.

Long Term - Saturday Through Wednesday
Showers with embedded thunderstorms and breezy southwesterly winds will develop across the forecast area on Saturday with dry weather conditions settling in over the region by Sunday, following the frontal passage, with dry weather expected to persist into next week. Temperatures will drop by Sunday, following the frontal passage, with daily high temps and overnight min temps rising to be above the seasonal average by the middle of next week.

Marine
High pressure will slowly weaken as it pushes eastward across the Gulf tonight and Thursday, becoming centered over south Florida by Friday. Gusty west-northwesterly winds today will briefly increase tonight for portions of our local offshore waters, where a Small Craft Advisory will be in effect through Thursday morning. Winds will shift to southwesterly while briefly diminishing from Thursday afternoon through Friday. Weak low pressure developing over the lower Mississippi Valley on Friday will shift eastward across the southeastern states on Saturday, moving offshore on Saturday night. This storm system will bring showers and a few embedded thunderstorms to our area on Saturday and Saturday night, along with Small Craft Advisory conditions for the offshore waters. Breezy northerly winds are forecast in the wake of this storm system on Sunday and Sunday night. Winds will shift to north-northeasterly by Monday as high pressure builds over the Mid-Atlantic states.

Rip Currents
SE GA Low Rest Of Today NE FL Low Rest Of Today

Fire Weather
...ELEVATED FIRE DANGER CONDITIONS THIS AFTERNOON... West to northwesterly winds continue today, with cold and dry air remaining over the region. The dry air will bring Min RH values into the 20s area-wide again today. The driest air will be over inland southeast Georgia with RH values in the lower 20s, a bit higher over northeast Florida where min RH values will be in the mid to upper 20s. With winds 10-15 mph with higher gusts up to 20-25 mph and ongoing drought, elevated fire danger conditions expected over inland areas (both Southeast GA and Northeast FL). Fair to good dispersions continue through midweek. A gradual increase in low level moisture expected by Friday. A low pressure system will bring a wetting rainfall to the area Saturday into Saturday night. Dry conditions arrive by midday Sunday into early next week.

FOG POTENTIAL AND OTHER REMARKS: Widespread frost and freeze over inland locations tonight and into early Thursday morning. Isolated thunderstorms possible Friday night into Saturday.

NOAA Jacksonville FL Office: Watches - Warnings - Advisories
FL...Freeze Warning from 1am to 8am EST Thursday for FLZ021-023- 024-030-031-035-120-136-137-140-220-232-236-237-240-322- 340-422-425-522. Frost Advisory from 3am to 8am EST Thursday for FLZ038-124- 125-132-225-325-433-533-633. GA...Freeze Warning from 1am to 8am EST Thursday for GAZ132>136- 149-151>153-162-163-165-250-264-350-364. Frost Advisory from 3am to 8am EST Thursday for GAZ154-166.

Marine
Small Craft Advisory from 11pm this evening to 10am EST Thursday for AMZ470-472.