Altamaha Sound, GA to Fernandina Beach, FL 20 - 60 NM Marine Forecast
| Rest Of Today...West Winds 10 To 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: West 4 Feet At 4 Seconds And East 3 Feet At 11 Seconds. |
| Tonight...West Winds 5 To 10 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Northeast 3 Feet At 11 Seconds And West 2 Feet At 4 Seconds. Areas Of Fog After Midnight. |
| Sunday...Northwest Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Northeast 3 Feet At 11 Seconds. Areas Of Fog In The Morning. |
| Sunday Night...South Winds 5 To 10 Knots, Becoming Southwest 10 To 15 Knots After Midnight. Seas 2 To 3 Feet, Building To 3 To 5 Feet, Occasionally To 6 Feet After Midnight. Wave Detail: East 3 Feet At 11 Seconds, Becoming East 4 Feet At 11 Seconds And Southwest 3 Feet At 3 Seconds. |
| Monday...Southwest Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Southwest 4 Feet At 4 Seconds And Northeast 4 Feet At 12 Seconds. A Slight Chance Of Showers In The Afternoon. |
| Monday Night...Northwest Winds 20 To 25 Knots With Gusts Up To 35 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: West 6 Feet At 5 Seconds And Northeast 3 Feet At 11 Seconds. A Slight Chance Of Showers In The Evening. |
| Tuesday...Northwest Winds 20 To 25 Knots, Diminishing To 15 To 20 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet, Subsiding To 3 To 5 Feet, Occasionally To 6 Feet. |
| Wednesday...Northwest Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. |
| Area Forecast Discussion National Weather Service Jacksonville FL 602am EST Sat Dec 27 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 - Widespread Dense Fog Potential Saturday Night and Sunday Morning. - Moderate Risk of Rip Currents at All Area Beaches through Monday. - Marine & Coastal Hazards Early Next Week. Small Craft Advisories Likely on Monday Night and Tuesday Morning. - Sharply Colder Weather Arrives Late Monday Night. Inland Freeze Likely on Tuesday Night with Low Wind Chills Possible. Additional Light Freezes Possible with Widespread Frost Potential for Inland Locations Wednesday Night through next Friday Night. Near Term - Through Tonight Overnight surface analysis depicts high pressure (1019 millibars) situated over the southeast Gulf. Meanwhile, weak low pressure (1009 millibars) was developing along a frontal boundary situated near North Carolina's Outer Banks. Aloft...ridging centered over the central and southern Gulf, while a potent shortwave trough was pivoting across New England. This weather pattern continues to create deep northwesterly flow aloft across our region. Latest GOES- East derived Total Precipitable Water imagery indicates that our air mass is slowly moistening from north to south, with PWAT (Precipitable Water) values now just above 1 inch for locations along and north of the Interstate 10 corridor, while values across north central Florida were closer to 0.75 inches. This moistening boundary layer has allowed for a deck of thickening stratocumulus cloud cover to overspread most of the state of Georgia, while lower stratus clouds and fog were progressing eastward from the Suwannee Valley across the U.S. Highway 301 corridor in northeast and north central Florida. Our local pressure gradient has tightened somewhat overnight due to developing low pressure well to the north of our area, and this was keeping a light west-southwesterly breeze in place at most locations. This breeze, in combination with increasing low and mid level cloud cover across our area, was keeping temperatures and dewpoints in the upper 50s to mid 60s throughout our region at 06Z. A rather stagnant weather pattern will prevail across our region through tonight, featuring stacked ridging over the eastern Gulf and the FL peninsula and a longwave trough digging southeastward from the northern Rockies towards the Plains states. The low and mid levels of the atmosphere will gradually moisten as deep northwesterly flow prevails. PWATs (Precipitable Waters) above 1 inch will make for a tricky cloud forecast today, as a climatologically low sun angle will likely allow for low stratus clouds and fog to linger this morning across northeast and north central FL, while mid-level stratocumulus cloud cover should also remain stubborn over the skies of southeast GA into the early afternoon hours. While a few sprinkles cannot be ruled out today beneath this cloud cover, a subsident weather pattern should prevent measurable rainfall. Breaks in the cloud cover during the mid to late afternoon hours should allow highs to climb to the mid to upper 70s, and a few locations where cloud cover breaks up earlier this afternoon could reach the lower 80s. Our local pressure gradient will likely remain tight enough to prevent the Atlantic sea breeze boundary from moving onshore along area beaches until the mid to late afternoon. Dewpoints rising into the low to mid 60s will add humidity to the ongoing warm spell. Another round of fog and low stratus clouds are expected to move onshore from the FL Big Bend and Nature Coasts later this evening, with these low clouds and likely dense fog expected to overspread our entire area from southwest to northeast overnight. Our local pressure gradient will also loosen overnight as high pressure becomes centered over the FL peninsula, with calm winds likely resulting in dense fog formation by the predawn and early morning hours that could extend into the near shore Atlantic waters. Lows will only fall to the 55-60 degree range area-wide tonight. Short Term - Sunday Through Monday Night Sunday, strong ridge axis shifts eastward and extends south along the east coast from Maine into northern FL. High pressure will descend south along the Mid Atlantic coast with a weak surface ridge axis extending SSW into the FL peninsula. Slight increase in heigheights aloft and light southwest flow will bring highs away from the coast to the upper 70s to around 80F degrees. Low level cumulus and high level cirrus will make for partly cloudy skies after fog slowly lifts Sunday mid to late morning due to weak winds under high pressure. A weak seabreeze will bring in south to southeasterly winds to the coastal counties. Sunday night, a strong shortwave trough will dive southeast from the upper Midwest into the OH and TN valleys. This feature will support a strong cold front moving into the deep south with winds increasing from the southwest well ahead of the front. Some patchy fog may develop in the flow off the Gulf coast, but winds should keep most fog elevated into low stratus. Lows will be in the mid to upper 50s. Monday, the shortwave will move through the eastern Great Lakes and southwestward into the TN valley, carving a deeper trough a trough across the eastern half of the country through the day. The cold front will begin to be deprived of moisture from the Gulf and showers will wither in coverage as the near the SE GA coast with only very light rainfall amounts expected over the western half of the area. Breezy southwest winds 10-20 mph with gusts to 25-30 mph between the cold front and high pressure departing to the east will boost highs to near record levels in the lower 80s. Long Term - Tuesday Through Friday Tuesday, the front will exit south of the area while strong high pressure builds in from the west northwest with brisk northwesterly winds 10-15 mph with gusts to 25 mph under thinning mid to high level cloud cover. Strong cold air advection will push much colder temperatures into the region as an arctic airmass surges southward from the Midwest behind a strong occluded low over southeast Quebec bringing a chill to the air as highs struggle rise out of the 40s into the low 50s over SE GA and remain in the 50s over NE FL. By Tuesday night, the colder airmass and clear skies will usher in freezing temperatures to all almost all of the area except for the the immediate NE FL coast staying in the mid 30s with now a potential hard freeze for far inland SE GA where lows will fall to the mid 20s and mid to upper 20s NW of highway 301 over NE FL. Additionally, light winds 5-8 mph and cold freezing temperatures will create cold weather advisory conditions across the area, which may spare the immediate NE FL coast. However, conditions on Wednesday early morning will be very cold and warrant protecting yourself from the cold by wearing multiple warm layers, gloves, a warm hat, and scarf as well as keeping your pets indoors and plants protected. Wednesday through Friday, shortwaves will reinforce deep troughing over the eastern half of the country extending southward into our region with below normal 500mb heigheights through the week. This will promote below normal highs (upper 50s/low 60s) and low temperatures (low/mid 30s) with inland light freezes Thursday and Friday morning with brisk west to northwest flow as high pressure to the west is replaced by stronger high pressure building southeast across the upper Midwest as a dry cold front passes through the area late on Thursday night. Next weekend, there high uncertainty on the timing and placement of a wave of low pressure tracking east along the Gulf coast as well as the forecast low temperatures. A more northward track of the low and warm advection would support lows closer to normal while a more southward track would support lows below freezing for areas north and west of Jacksonville. For now have limited precipitation to 15-20 percent over NW portions of the area. Marine High pressure centered over the southeast Gulf will shift slowly eastward today, becoming positioned over the Florida peninsula by this evening. Breezy westerly winds early this morning offshore will diminish this afternoon and evening. High pressure will then weaken and slide southward on Sunday night ahead of a strong cold front, which may bring a few showers to our local waters on Monday afternoon and evening. Southwesterly winds will develop ahead of this approaching front on Sunday night, with speeds gradually strengthening on Monday before shifting to westerly on Monday evening as the front crosses our region. Speeds will increase to Caution levels early on Monday evening before strengthening to Small Craft Advisory levels towards midnight as winds shift to northwesterly following the passage of the front. Occasional Gale Force wind gusts will be possible late Monday night and early Tuesday morning. Small Craft Advisory conditions will likely continue through Tuesday morning, and breezy northwesterly winds will continue in the wake of this frontal passage for much of next week as high pressure builds eastward along the northern Gulf coast. Rip Currents SE GA Moderate Sunday NE FL Moderate Sunday Fire Weather High pressure just southwest of the area today will shift southeast across the FL peninsula into Monday with light west to northwest winds 8-12 mph today. As the high moves just south of the area, very light south to southwest winds 3-5 mph will become southerly due to a weak Atlantic seabreeze in the afternoon hours. The weak surface and transport winds will create low daytime dispersions Sunday area wide. Breezier southwesterly winds arrive Monday ahead of an approaching cold front elevating winds 10-20 mph gusting to 25-30 mph. Temperatures will remain above normal into Monday. But, a much colder and drier airmass arrives Tuesday as strong high pressure builds west of the region. The drier airmass will lower with minRH values to below critical for much of next week. FOG POTENTIAL AND OTHER REMARKS: Patchy to areas of fog is expected to develop each night across the Suwannee Valley and I-75 corridor into north central FL early this morning and each subsequent early morning through this weekend. The fog could be locally dense. Climate Ahead of a cold front on Monday 12/29 across northeast FL, record highs are possible with current records standing at: December 29th: KJAX: 83/2015 KGNV: 82/2021 KCRG: 82/2021 NOAA Jacksonville FL Office: Watches - Warnings - Advisories FL...None. GA...None. Marine None. |
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