St. Augustine to Flagler Beach, FL 20 - 60 NM Marine Forecast
| Today...South Winds 10 To 15 Knots, Becoming South Southwest 5 To 10 Knots This Afternoon. Seas Around 2 Feet. Wave Detail: Southwest 2 Feet At 3 Seconds And Northeast 2 Feet At 6 Seconds. |
| Tonight...South Southwest Winds Around 10 Knots, Becoming Northwest Around 15 Knots After Midnight. Seas 2 To 3 Feet. Wave Detail: Northwest 2 Feet At 3 Seconds And South 2 Feet At 3 Seconds. A Chance Of Showers After Midnight. |
| Sunday...Northwest Winds 20 To 25 Knots. Occasional Gusts To Gale Force Possible In The Afternoon. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: North 6 Feet At 5 Seconds And East 2 Feet At 9 Seconds. Showers. |
| Sunday Night...Northwest Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: North 5 Feet At 6 Seconds And East 2 Feet At 9 Seconds. |
| Monday And Monday Night...Northwest Winds 10 To 15 Knots, Increasing To 15 To 20 Knots After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: North 4 Feet At 6 Seconds And East 2 Feet At 9 Seconds. |
| Tuesday And Tuesday Night...North Winds 15 To 20 Knots, Becoming Northeast Around 15 Knots After Midnight. Seas 4 To 6 Feet, Occasionally To 8 Feet. |
| Wednesday And Wednesday Night...Northeast Winds 10 To 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. A Slight Chance Of Showers After Midnight. |
| Area Forecast Discussion National Weather Service Jacksonville FL 307am EST Sat Jan 17 2026 .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 - Freeze Warnings and Frost Advisories Early this Morning for Inland Locations. - Winter Weather Advisories on Sunday Morning for Coffee & Jeff Davis Counties in Southeast GA. Snow Accumulation Up to One Half Inch Possible on Grassy and Elevated Surfaces. Brief Period of Snow Flurries Possible for the Rest of Inland Southeast GA on Sunday Morning. - Small Craft Advisory Likely on Sunday. - Widespread Freezes from Sunday Night through Tuesday Night. Hard Freezes Possible for Inland Southeast GA, Light Freezes Elsewhere Inland. Frost Potential at Coastal Locations Sunday Night and Monday Night. Near Term - Through Tonight Clouds are beginning to stream across the area from west to east this evening. With the advancing clouds, temperatures should begin to level off as Lows remain in the 30s across inland locations and the 40s along the coast. Cloud coverage will increase through the rest of Today as high pressure continues to shift away from the FL peninsula ahead of an advancing cold front from the northwest. Light southerly-southwesterly flow will allow for warmer, moist air to filter into the region as the day progresses, with PWATs (Precipitable Waters) rising to 1+" for most locations by Saturday evening. With warmer air filtering into the region, temperatures will rise into the 60s across SE GA and the Suwannee Valley region of NE FL, while the rest of NE FL will warm to the 70s. With the front nearing the region, isolated to scattered showers will begin to move into the region by the late afternoon/early evening hours, with numerous to widespread showers across the area by Sunday morning. Overnight Lows in the lower to mid 30s across SE GA, with upper 30s to mid 40s across NE FL. Short Term - Sunday Through Monday Night The base of a reinforcing trough will pivot across the Deep South on Sunday, with this feature quickly accelerating northeastward by Sunday evening. A 170-knot jet streak at 250 millibars (around 35,000 feet) associated with this sharpening trough will take shape downstream of this approaching trough over the Mid-Atlantic and New England coasts during the predawn hours on Sunday, with this feature only slowly moving offshore during the afternoon and evening hours. The entrance region of this jet streak will gradually migrate across our area from around sunrise through around noon, developing a weak wave of surface low pressure along an Arctic cold front that will be traversing our region. This weather pattern will allow for strengthening isentropic lift / overrunning along and behind this Arctic cold front through early Sunday afternoon, with enough moisture available (PWATs (Precipitable Waters) of 1 - 1.3 inches) allowing for widespread beneficial rainfall to traverse our area, mainly late Saturday night through the mid-portions of Sunday afternoon. Model soundings continue to indicate a cooling atmospheric column in the wake of the Arctic cold frontal passage that will arrive in time for rain to change to light snow portions of inland southeast GA on Sunday morning, mainly for locations north and west of Waycross, as surface temperatures tumble through the 30s due to wet bulbing and dynamic cooling in this developing cold air advection pattern. A few hours of light snowfall may allow for accumulations of up to one half inch across Coffee and Jeff Davis Counties, mainly on grassy and elevated surfaces, as antecedent rainfall likely keeps most road surfaces wet rather than icy. This event will NOT be similar to accumulating snowfall events that were experienced in southeast GA in January 2025 and 2018, as only a brief window 1-3 hour window exists for some accumulating snowfall. In coordination with surrounding WFOs in Tallahassee and Peachtree City (GA), we have issued a Winter Weather Advisory for Coffee and Jeff Davis Counties in southeast GA on Sunday morning for the possibility of light snowfall accumulations that should be around or less than one half inch. Beneficial rainfall amounts of one half to three quarters of an inch can be expected from Saturday night through around noon on Sunday for locations north of the Interstate 10 corridor, with amounts south of I-10 forecast to be closer to one quarter of an inch. Skies will gradually clear from west to east from the mid-afternoon hours through sunset, with a chilly northwesterly breeze keeping highs in the 40s for most locations on Sunday, except lower 50s for north central and portions of coastal northeast FL. The weak wave of surface low pressure traversing our region on Sunday will strengthen as it accelerates northeastward off the Mid-Atlantic coast on Sunday evening. Our local pressure gradient will gradually loosen on Sunday night as this storm system quickly moves away from our region, but a light northwesterly breeze will likely continue at coastal locations overnight, as high pressure builds eastward along the northern Gulf coast. Lows will fall to the mid and upper 20s inland, ranging to the low or mid 30s at coastal locations. Wind chill values should be near Cold Weather Advisory (25 degrees or lower) for northeast and north central FL by the predawn and early morning hours on Monday. Freeze Watches have already been posted for our entire area for late Sunday night and early Monday morning. A reinforcing Arctic dome of high pressure will build southeastward through the Plains states on Monday, settling over the lower Mississippi Valley and the Deep South towards sunrise on Tuesday. Despite sunny skies, cold air advection will keep highs generally in the 50-55 degree range, except upper 50s for north central FL. A potent shortwave trough pivoting across the Ohio Valley and the Great Lakes states on Monday night will strengthen the southern branch of the jet stream across the northern Gulf coast, likely advecting a veil of cirrus across our skies towards the predawn and early morning hours on Tuesday. However, cold air advection will continue across our area as our local pressure gradient tightens a little due to the upstream Arctic high pressure dome building into our region, which could drop wind chill values down to near Cold Weather Advisory criteria across much of our area. Another hard freeze is likely across inland southeast GA, with a light freeze expected elsewhere inland and also for coastal southeast GA, with lows likely remaining in the mid to upper 30s for coastal northeast FL due to a strengthening northwesterly breeze overnight. .LONG TERM /TUESDAY THROUGH NEXT SATURDAY/... Deep troughing over the eastern two-thirds of the nation on Tuesday will flatten somewhat by midweek as a reinforcing trough pivots across the Upper Midwest, allowing for a southern stream trough to progress eastward along the northern Gulf coast from Wednesday night through Thursday, with this feature then pushing across our area on Thursday and Thursday night. A zonal flow pattern will then prevail in the wake of this southern stream trough late this week and into next weekend. Arctic high pressure will continue to weaken over the southeastern states on Wednesday, pushing offshore on Wednesday evening. Mid and high altitude cloudiness will increase from west to east on Wednesday afternoon, with coastal troughing developing towards the evening hours across our near shore Atlantic waters helping to increase marine stratocumulus by Wednesday evening. Inland highs on Wednesday will range from the upper 50s for most of southeast GA to the upper 60s for inland northeast FL, with breezy onshore winds keeping coastal locations in the upper 50s to lower 60s. Thickening cloud cover on Wednesday night will keep temperatures above freezing area- wide, with a developing warm air advection pattern and a light northerly breeze resulting in lows in the upper 30s for inland southeast GA and the 40s elsewhere, except lower 50s for coastal northeast FL. The southern stream shortwave that will be traversing the northern Gulf should develop a weak wave of low pressure along a frontal boundary that will be stalled across the Gulf and the FL peninsula. Strengthening isentropic lift / overrunning to the north of this frontal boundary and wave over our area should develop a few waves of showers that will migrate across our region on Thursday and Thursday night, with higher rainfall totals likely for locations south of I-10. Despite clouds and increasing rainfall chances, warm air advection should allow highs to climb into the 60s on Thursday, except around 70 for north central FL. Lows from Thursday night through next week should remain in the 40s, except low and mid 50s for north central and coastal northeast FL. Zonal flow aloft should then bring a more Pacific type of air mass instead of Arctic to our area from late week into next week, as high pressure builds along the southeastern seaboard in the wake of the departing southern stream shortwave / weak frontal wave. Highs on Friday should climb to the mid and upper 60s for locations north of I-10, with low to mid 70s forecast for inland locations south of I-10. Marine High pressure will shift eastward through the overnight hours, with winds shifting to come from the south to southeast. Another Arctic cold front will enter the southeastern states this afternoon, crossing our local waters on Sunday morning. This front will be accompanied by showers this evening through the early afternoon hours on Sunday. Northwesterly winds will strengthen by early Sunday morning, with Small Craft Advisory conditions likely through Sunday evening throughout our local waters. Arctic high pressure will remain centered to the west or northwest of our region early next week, keeping breezy northwest to northerly winds and elevated seas in place. High pressure will then start to position north of our waters towards midweek. Rip Currents Southeast GA Beaches: Low Today and Sunday Northeast FL Beaches: Moderate Today and Sunday Fire Weather - Low Daytime Dispersions Today For Coastal Southeast Georgia A few showers may move across inland locations west of Waycross in southeast Georgia late this afternoon and early this evening. Rainfall will then overspread southeast Georgia and the Suwannee Valley, mainly after midnight tonight. Rainfall will then overspread the rest of our area shortly after sunrise on Sunday, with rain likely changing to a period of light snowfall during the mid to late morning hours across inland portions of southeast Georgia, with accumulation of up to one half inch possible on grassy and elevated surfaces. Rainfall elsewhere will move offshore by the mid-afternoon hours, with another Arctic blast of cold and dry air then pushing into our region from Sunday night through the mid portion of next week. Breezy southerly transport winds this morning will shift to southwesterly this afternoon, with speeds gradually diminishing as the day progresses. Increasing cloud cover and surface wind speeds sustained at only 5-10 mph will result in poor daytime dispersion values across southeast Georgia and the northern Suwannee Valley, with marginally low values for coastal southeast Georgia, while fair values are generally forecast elsewhere. Breezy northwesterly transport winds will then overspread our area early on Sunday morning, with these breezy winds countering widespread morning cloud cover to create generally fair daytime dispersion values. Good values are forecast for locations north and west of Waycross, where clearing skies are forecast by late afternoon. Breezy northwesterly transport winds will continue on Monday, resulting in generally fair daytime dispersion values despite low mixing heights. A much drier air mass will plunge into our region, dropping afternoon humidity values to near or just above critical thresholds. Long durations of critically low humidity values are forecast on Tuesday for inland southeast Georgia. FOG POTENTIAL AND OTHER REMARKS: A light inland freeze and areas of frost are forecast for inland locations west of the Interstate 95 corridor early this morning. Hard inland freezes are likely for inland southeast Georgia early on Monday, Tuesday, and Wednesday mornings, with a hard freeze possible early on Monday morning for inland locations along the Interstate 10 corridor. Light freezes and frost potentially may extend to coastal locations early next week. NOAA Jacksonville FL Office: Watches - Warnings - Advisories FL...Frost Advisory until 8am EST this morning for FLZ021-120-220. Freeze Watch from late Sunday night through Monday morning for FLZ021-023-024-030-031-035-038-120-124-125-132-136>138- 140-220-225-232-233-236-237-240-322-325-333-340-422-425- 433-522-533-633. Freeze Warning until 7am EST this morning for FLZ023-024-030- 031-035-136-137-140-225-232-236-237-240-322-340-422-425- 522. GA...Frost Advisory until 8am EST this morning for GAZ132-133-149- 162-163. Freeze Watch from late Sunday night through Monday morning for GAZ132>136-149-151>154-162-163-165-166-250-264-350-364. Freeze Warning until 7am EST this morning for GAZ134>136- 151>153-165-250-264-350-364. Winter Weather Advisory from 7am to noon EST Sunday for GAZ132-133. Marine None. |
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