Fernandina Beach to St. Augustine, FL 20 - 60 NM Marine Forecast
| Rest Of Today...North Winds 25 To 30 Knots With Gusts Up To 40 Knots. Seas 12 To 15 Feet, Occasionally To 19 Feet. Wave Detail: Northeast 11 Feet At 8 Seconds And East 10 Feet At 13 Seconds. A Slight Chance Of Thunderstorms. A Chance Of Showers Late This Morning, Then Showers Likely This Afternoon. |
| Tonight...North Winds 20 To 25 Knots. Gusts Up To 35 Knots In The Evening. Seas 12 To 15 Feet, Occasionally To 19 Feet, Subsiding To 10 To 13 Feet, Occasionally To 17 Feet After Midnight. Wave Detail: Northeast 11 Feet At 9 Seconds And East 10 Feet At 15 Seconds, Becoming East 10 Feet At 14 Seconds And Northeast 9 Feet At 9 Seconds. A Chance Of Showers, Mainly In The Evening. |
| Wednesday...Northeast Winds Around 20 Knots. Seas 9 To 11 Feet, Occasionally To 14 Feet, Subsiding To 8 To 9 Feet, Occasionally To 11 Feet In The Afternoon. Wave Detail: Northeast 10 Feet At 11 Seconds And Northeast 8 Feet At 9 Seconds, Becoming Northeast 9 Feet At 10 Seconds. A Slight Chance Of Showers In The Afternoon. |
| Wednesday Night...Northeast Winds 20 To 25 Knots With Gusts Up To 35 Knots. Seas 8 To 10 Feet, Occasionally To 13 Feet. Wave Detail: Northeast 10 Feet At 11 Seconds And Northeast 2 Feet At 5 Seconds. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Thursday And Thursday Night...Northeast Winds 20 To 25 Knots With Gusts Up To 35 Knots. Seas 9 To 11 Feet, Occasionally To 14 Feet. Wave Detail: Northeast 11 Feet At 12 Seconds And Northeast 4 Feet At 7 Seconds. Showers Likely With A Chance Of Thunderstorms. |
| Friday...East Winds 20 To 25 Knots. Seas 8 To 11 Feet, Occasionally To 14 Feet. Wave Detail: Northeast 10 Feet At 13 Seconds And East 9 Feet At 8 Seconds. Showers Likely With A Chance Of Thunderstorms. Winds And Seas Higher In And Near Thunderstorms. |
| Saturday...East Winds 20 To 25 Knots. Seas 8 To 11 Feet, Occasionally To 14 Feet. Wave Detail: Northeast 10 Feet At 13 Seconds And East 9 Feet At 8 Seconds. Showers Likely With A Chance Of Thunderstorms. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Jacksonville FL 141pm EDT Tuesday September 30 2025 Near Term Issued at 1216pm EDT Tuesday September 30 2025 Breezy to Windy North to Northeast flow between Hurricane Imelda off the FL East Coast and High Pressure ridge to the North and Northwest will continue through tonight. Sustained wind speeds of 15-25G35 mph along the Atlantic Coastal areas this afternoon will weaken to 10-20G30 mph tonight, while breezy winds of 15G25 mph over inland areas will fade to 5-10 mph by the overnight hours later tonight. The abundant cloud cover today and scattered showers along the Atlantic Coastal areas will hold Max temps into the upper 70s/near 80F this afternoon, while some sunny breaks over inland areas should allow for some Max temps into the 80-85F range. Scattered Rainfall chances along the Atlantic Coastal areas this evening will become more isolated during the overnight hours as Imelda continues to slowly pull away, while inland areas remain dry with some partial clearing during the overnight hours. The decreasing winds and some clearing skies over inland areas, will allow for Min temps to fall into the lower 60s across inland SE GA and the mid/upper 60s across inland NE FL, while the elevated winds along the Atlantic Coast will only allow for temps to fall into the lower/middle 70s. Likely too much wind for any significant fog formation tonight, except for maybe some patchy fog across far inland SE GA around sunrise Wednesday morning. .SHORT TERM... (Wednesday through Thursday night) Issued at 1216pm EDT Tuesday September 30 2025 Strong high pressure will be located to the north Wednesday, with an inverted trough along the coastal Atlantic waters. An enhance pressure gradient between these two features will result in elevated onshore flow. With the ridge in place inland areas will be dry, with greatest chances for showers along the NE FL coast due to convergence associated with coastal trough. Highs Wednesday will range from the lower 80s at the coast, to the mid 80s inland. For Wednesday night through Thursday the high will become stronger, and centered more toward the northeast. The troughing will remain along the coastal Atlantic waters. The best chances for showers Wednesday night, will remain along the coast of NE FL. The best chances for showers Thursday will generally be east of a line from Gainesville to Brunswick. The chances will spread across all coastal areas of SE GA and NE FL Thursday night. There is a slight chance for a few thunderstorms to be embedded with showers Wednesday through Thursday night. Temperatures will trend near to a little below normal this period. With the onshore flow, the coolest day time readings will be near the coast, with the coolest night time readings inland. Long Term (Friday through next Tuesday) Issued at 1216pm EDT Tuesday September 30 2025 High pressure will remain centered to the northeast Friday and Saturday, with inverted troughing over the coastal waters. Precipitation chances will increase Friday into Saturday, with greatest chances along the coast. The high will move further away to the northeast Sunday through Tuesday. The moist onshore flow will continue, with precipitation chances spreading across area. Daytime temperatures are expected to be near normal inland, and near to below near the coast. Overnight lows will trend above normal this period, especially near the coast. Marine Issued at 1216pm EDT Tuesday September 30 2025 Small Craft Advisory conditions with breezy north-northeasterly winds and high seas will persist across the coastal waters through the week and into the upcoming weekend, along with occasional wind gusts to gale force at times. The local area will be between Tropical Storm Imelda lifting away from the Florida east coast and strong high pressure building down the eastern US. Winds slowly shift to easterly Friday into the weekend as the strong high pressure shifts further down the eastern seaboard. Hydrology Issued at 1216pm EDT Tuesday September 30 2025 A few spots may push close to Minor Flood levels along the St. Johns River Basin and NE FL Atlantic beachfront to the south of Jacksonville today and Wednesday, but likely not widespread enough to warrant Coastal Flood Advisories at this time. A more significant push of NE winds and the approach of the full moon later this week will likely bring more widespread Minor coastal and tidal flooding on Thursday/Friday and expect Coastal Flood Advisories to be posted sometime on Wednesday. The latest PETSS guidance is suggesting potential for Moderate (Coastal Flood Watch and/or Warning) water levels Friday Night into the upcoming weekend, with the best chances for the St. Johns River Basin as potential heavy rainfall could fall into the basin and bring higher confidence in Moderate Coastal Flooding with water levels reaching 2 ft above MHHW in the St. Johns River Basin, and into the 2 to 2.5 ft above MHHW along the Atlantic beach front locations. NOAA Jacksonville FL Office: Watches - Warnings - Advisories FL...High Rip Current Risk through late Friday night for FLZ124-125- 138-233-333. High Surf Advisory until 5am EDT Saturday for FLZ124-125-138- 233-333. GA...High Rip Current Risk through late Friday night for GAZ154-166. High Surf Advisory until 5am EDT Saturday for GAZ154-166. AM...Small Craft Advisory until 5am EDT Sunday for AMZ450-452-454- 470-472-474. |
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