Altamaha Sound to Fernandina Beach FL Marine Forecast
| Rest Of Tonight...East Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast 4 Feet At 5 Seconds And Northeast 3 Feet At 8 Seconds. Intracoastal Waters Choppy. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Tuesday...East Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast 5 Feet At 6 Seconds. Intracoastal Waters Choppy. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Tuesday Night...East Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Northeast 5 Feet At 7 Seconds. Intracoastal Waters Choppy. A Chance Of Showers. A Chance Of Thunderstorms, Mainly In The Evening. |
| Wednesday...East Winds 10 To 15 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 8 Seconds. Intracoastal Waters A Moderate Chop. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Wednesday Night...Southeast Winds 10 To 15 Knots, Becoming South 5 To 10 Knots After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 8 Seconds. Intracoastal Waters A Moderate Chop. A Slight Chance Of Showers And Thunderstorms In The Evening, Then A Chance Of Showers After Midnight. |
| Thursday And Thursday Night...Southwest Winds 5 To 10 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: East 4 Feet At 8 Seconds. Intracoastal Waters Light Chop. A Chance Of Showers And Thunderstorms. |
| Friday...South Winds 5 To 10 Knots. Seas 2 To 3 Feet. Intracoastal Waters Light Chop. A Chance Of Showers And Thunderstorms. Winds And Waves Higher In And Near Thunderstorms. |
| Saturday...South Winds 5 To 10 Knots. Seas 2 To 3 Feet. Intracoastal Waters Light Chop. A Chance Of Showers And Thunderstorms. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Jacksonville FL 127am EDT Tuesday September 8 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 - High Rip Current Risk Today north of St. Johns County & Elevated Tides - Daily Afternoon & Evening Thunderstorms. Near Term - Through Tonight Highligheights Through Tonight: - Breezy onshore/easterly winds today - Passing gusty showers & inland mainly afternoon storms northeast Florida Taste of fall continues for southeast GA and northeast Florida today with waves of coastal showers and increasingly breezy northeast to east winds as a weak coastal trough develops over the adjacent coastal waters. Low chance (< 10%) of a morning coastal thunderstorm focused south of St. Augustine where deeper moisture resides near the departing surface front across north-central FL. Through the day, shower activity will expand inland with diurnal heating, but convective depth will be limited across much of southeast GA and and near and north of the FL Interstate 10 corridor as drier mid and upper level air from the north filters across the area. Thus, expected mostly diurnally driven showers into the afternoon for locations north of I-10 while the better coverage of afternoon showers and thunderstorms focuses across north-central FL, generally from St. Augustine toward Gainesville southward. This evening, inland showers fade while coastal showers and isolated thunderstorms continue as the coastal trough lingers offshore. After midnight, the coastal trough begins to break down and weaken as surface high pressure offshore of the mid-Atlantic region settles southward. Could see an influx of shower activity toward daybreak, shifting farther inland as the trough axis also shifts westward. High temperatures trend a little warmer into today nearing 90 toward the Interstate 75 corridor while breezy onshore winds keeps coastal areas cooler with highs in the mid 80s. Tonight, lows will continue to range in the 70s to near 80 toward the coast. Short Term - Wednesday Through Thursday Night Main Highligheights This Period: - Daily Thunderstorms Chances A cold front will sit over the FL peninsula through midweek, weakening and dissipating by Thursday evening. The overall flow will shift from easterly to southeasterly and eventually southwesterly by Thursday afternoon as mid level ridging sits off the Atlantic coast. With easterly-southeasterly onshore flow continuing on Wednesday, shower and storm activity will push towards inland locations by the afternoon hours. Wednesday highs will be in the upper 80s to lower 90s, with the coolest temperatures along the coast with the onshore flow. As ridging develops over the western Atlantic, deep southwesterly flow makes a return, bringing elevated moisture once again with PWATs (Precipitable Waters) rising to the 2.2" to 2.4" range. The overall flow will allow for the gulf breeze to push inland, which in turn will direct showers and storms from west to east. By the afternoon, mergers between the breezes will likely be along the eastern portion of the area near the I-95 corridor. Thursday highs will be a bit warmer as most locations will have temperatures in the lower 90s, with mid 80s to lower 90s along the coast. Long Term - Friday Through Monday Main Highligheights This Period: - Daily Thunderstorms Chances Southwesterly flow ahead of a frontal boundary as it begins to slow and stall over central GA this weekend. Chances of precipitation look to remain in the 60% range Friday/Saturday with the Weather Prediction Center having the entire area under a 'Marginal' risk of excessive rainfall both days. Chances begin to trend down to the 30% to 50% for a majority of the area with north central FL remaining in the 60% range on Sunday/Monday. Temperatures will predominantly be in the lower 90s through the upcoming weekend into next week. Marine A coastal trough develops today and persists through Wednesday morning with waves of gusty showers and isolated thunderstorms. The trough begins to weaken Wednesday night into Thursday as high pressure builds northeast of the region. The high will then extend across the Florida peninsula Friday into the weekend with a return of southwest winds and the afternoon east coast sea breeze. Rip Currents...Onshore ENE winds strengthen today with building surf. With elevated ENE wind surge over the waters, extended the high rip current risk southward from southeast GA to included northeast FL beaches down the St. Johns county coast. Flagler county remains under a Moderate rip current risk today. Surf heigheights increase to 2-4 ft through the evening. High rip current risk likely for all local beaches Wednesday due to persistent onshore flow and elevated surf. Fire Weather A cold front lingers across central Florida through midweek before weakening and dissipating by Thursday evening. Increased rain and storm chances are forecast each day as onshore winds brings morning coastal showers which will spread towards inland locations throughout the day and increase in coverage. There remains potential for locally heavy downpours through mid-week. Overall, dispersion will be fair to good Tuesday and Wednesday. Winds will shift to southerly/southwesterly Thursday through the weekend as ridging develops off the east coast. Fog Potential: Gusty and erratic winds will occur with thunderstorm activity. Patchy inland morning fog possible each day. Hydrology Coastal water levels are progressively increasing this week with the approach of the New Moon on Sept 11th and breezy onshore easterly winds late Tonight through Wednesday, with the peak winds across the local waters and coast Tuesday. At this time, guidance and observations show that water levels will be near and just above the action stage through Wednesday both along the local Atlantic coast and within the St. Johns River basin. NOAA Jacksonville FL Office: Watches - Warnings - Advisories FL...High Risk for Rip Currents from 8am EDT this morning through late tonight for FLZ124-125-233-333. GA...High Risk for Rip Currents from 8am EDT this morning through late tonight for GAZ154-166. Marine None. |
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