Marine Weather Net

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


REST OF TONIGHT

NE
WINDS
5 - 10
KNOTS

SUNDAY

N
WINDS
5 - 10
KNOTS

SUNDAY NIGHT

N
WINDS
5 - 10
KNOTS

MONDAY

NW
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
AMZ472 Forecast Issued: 836 PM EST Sat Jan 25 2025

Rest Of Tonight...Northeast Winds 5 To 10 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Northeast 4 Feet At 8 Seconds.
Sunday...North Winds 5 To 10 Knots. Seas Around 3 Feet. Wave Detail: Northeast 3 Feet At 8 Seconds.
Sunday Night...North Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: East 3 Feet At 9 Seconds.
Monday...Northwest Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: East 3 Feet At 9 Seconds.
Monday Night...West Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: West 2 Feet At 3 Seconds And East 2 Feet At 9 Seconds.
Tuesday...West Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: West 2 Feet At 3 Seconds And East 2 Feet At 9 Seconds.
Wednesday...Northeast Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Northeast 4 Feet At 6 Seconds And West 3 Feet At 4 Seconds.
Thursday...Northeast Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Northeast 4 Feet At 6 Seconds And West 3 Feet At 4 Seconds.
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Area Forecast Discussion
National Weather Service Jacksonville FL
1204am EST Sunday Jan 26 2025

Near Term
Issued at 216pm EST Sat Jan 25 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

High pressure will continue to weaken as it settles southward towards our area tonight. Fast zonal flow aloft will transport an increasing coverage of high altitude cirrus cloud cover across our area after midnight, with slightly thicker cirrus possible towards sunrise across southeast GA. Otherwise, winds will become calm inland early this evening, with a light northwesterly cold air drainage flow expected to develop overnight at coastal locations. Excellent radiational cooling this evening will likely result in one final night of widespread sub-freezing temperatures throughout southeast GA and the Suwannee Valley, where Freeze Warnings have been continued for tonight, with an expansion of this Freeze Warning into portions of north central and inland northeast FL, where with widespread frost and lows around freezing are forecast. Lows will likely flirt with Hard Freeze criteria across portions of inland southeast GA and the Suwannee Valley, but calm winds will preclude the need for a Cold Weather Advisory. A Frost Advisory has been issued for portions of north central and coastal northeast FL, where temperatures will likely plummet to the mid 30s towards midnight before holding steady during the predawn and early morning hours.

.SHORT TERM... (Sunday through Monday night) Issued at 216pm EST Sat Jan 25 2025

Broad and weakening high pressure will remain over the area on Sunday and into Sunday Night as a weak cold front approaches from the north. Mostly zonal flow aloft will keep the front and associated upper level shortwave from making much progress south and packing much of a punch as it moves into the area. Only limited chances for showers will be expected for interior southeast GA overnight Sunday Night and into Monday, with just some cloud cover otherwise moving in for Sunday Night and Monday. A moderating trend is expected to continue for both daytime highs and overnight lows area wide: Most areas will rise into the 60s Sunday except over far interior GA and the immediate coast where a weak sea breeze will likely develop. Monday will feature a bit stronger of a temperature gradient from north to south due to thicker cloud cover and some rain chances north, though still well into the 60s to near or just above 70 south and upper 50s to low 60s generally north of I-10. Some patchy frost is possible Monday Morning over the far interior, but otherwise not expecting any cold weather hazards over the short term at this time.

Long Term
(Tuesday through next Saturday) Issued at 216pm EST Sat Jan 25 2025

The aforementioned front essentially fizzles across the area by Tuesday, with generally weak high pressure dominating the pattern through Tuesday Night. Another front, looking to be mainly a dry front, pushes southward and across our region Wednesday Night and Thursday. This front doesn't look to have a particularly strong temperature gradient with it, but will certainly bring a stronger pressure gradient as high pressure builds from the north and quickly shifts towards the Mid Atlantic states by the end of the week. Temps start the long term generally above average for Tuesday and Wednesday, falling towards closer to normal to end the week behind the frontal passage on Wednesday Night/Thursday.

Marine
Issued at 1205pm EST Sat Jan 25 2025

High pressure building over the southeastern states today will shift southward and will be positioned directly over our local waters tonight and Sunday while gradually weakening. Otherwise, a frontal boundary entering the southeastern states on Monday will stall and dissipate near the Georgia waters by Tuesday. Seas of 3 to 5 feet will prevail offshore through Sunday, with 2 to 4 foot seas expected near shore. Seas will then subside to around 2 feet near shore from Monday through Wednesday, with 2-3 foot seas expected offshore.

Another weak frontal boundary will then cross our local waters on Wednesday night and Thursday morning, followed by stronger high pressure building over the Tennessee Valley and the Carolinas late this week, potentially resulting in strengthening onshore winds as this high pressure center wedges down the southeastern seaboard.

Rip Currents
A gradually fading northeasterly ocean swell will keep a lower-end moderate rip current risk in place at the northeast FL beaches this weekend. A low risk is anticipated at the southeast GA beaches.

Fire Weather
Issued at 1205pm EST Sat Jan 25 2025

Surface and transport winds will become northeasterly this afternoon, with slightly higher transport speeds expected for locations south of the Interstate 10 corridor, resulting in fair to good daytime dispersion values. Meanwhile, light and variable surface and transport winds across southeast GA this afternoon will create low daytime dispersion values, with poor values extending across the Interstate 10 corridor. A dry air mass persisting across our region will drop minimum relative humidity values to the 30-35 percent range at most inland locations this afternoon. Light westerly surface and transport winds will develop across inland southeast GA on Sunday, while light northeasterly surface and transport winds prevail across north central FL. These light winds will yield low daytime dispersion values throughout southeast GA and most of northeast FL, with poor values forecast for north central FL. Surface and transport winds will then shift to west-southwesterly on Monday, with gradually increasing transport speeds for locations along and south of the I-10 corridor, resulting in fair to good daytime dispersion values. Lighter speeds for locations north of I-10 will likely result in in another day of low daytime dispersion values for southeast GA and far northern portions of the Suwannee Valley.

NOAA Jacksonville FL Office: Watches - Warnings - Advisories
FL...Freeze Warning until 9am EST this morning for FLZ021-023-024- 030-031-035-120-136-220-225-232-236-322-422-425-522.

Frost Advisory until 8am EST this morning for FLZ033-038-124- 125-132-137-140-237-240-325-340.

GA...Freeze Warning until 9am EST this morning for GAZ132>136-149- 151>154-162-163-165-166-250-264-350-364.

AM...None.