Fernandina Beach to St. Augustine, FL Out 20 NM Marine Forecast
| Rest Of Today...Northeast Winds 20 To 25 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: Northeast 7 Feet At 8 Seconds. Intracoastal Waters Rough. Showers Likely With A Slight Chance Of Thunderstorms. |
| Tonight...Northeast Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Northeast 6 Feet At 8 Seconds. Intracoastal Waters Choppy. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Thursday...Northeast Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Northeast 5 Feet At 8 Seconds. Intracoastal Waters Choppy. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Thursday Night...East Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 8 Seconds. Intracoastal Waters Choppy. A Chance Of Showers. A Slight Chance Of Thunderstorms After Midnight. |
| Friday...East Winds 20 To 25 Knots, Increasing To 25 To 30 Knots In The Afternoon. Seas 4 To 6 Feet, Occasionally To 8 Feet, Building To 5 To 8 Feet, Occasionally To 10 Feet In The Afternoon. Wave Detail: East 6 Feet At 7 Seconds And East 3 Feet At 4 Seconds, Becoming East 7 Feet At 7 Seconds. Intracoastal Waters Very Rough. A Chance Of Thunderstorms. Showers. |
| Friday Night...East Winds 25 To 30 Knots, Diminishing To 20 To 25 Knots After Midnight. Seas 7 To 9 Feet, Occasionally To 11 Feet. Wave Detail: East 9 Feet At 7 Seconds. Intracoastal Waters Very Rough. Showers With A Chance Of Thunderstorms. |
| Saturday...Southeast Winds 20 To 25 Knots. Seas 5 To 8 Feet, Occasionally To 10 Feet. Intracoastal Waters Rough. Thunderstorms Likely Through The Day. Showers. A Chance Of Thunderstorms Through The Night. A Chance Of Showers After Midnight. |
| Sunday...South Winds 15 To 20 Knots, Becoming Southwest 10 To 15 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet, Subsiding To 3 To 4 Feet, Occasionally To 5 Feet After Midnight. Intracoastal Waters Choppy. A Chance Of Showers With A Slight Chance Of Thunderstorms In The Morning, Then Showers Likely With A Chance Of Thunderstorms In The Afternoon. A Slight Chance Of Showers And Thunderstorms Through The Night. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Jacksonville FL 208pm EDT Wednesday Oct 7 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 - Flooding Rainfall Risk Coastal Areas & St. Johns Basin Today - Tidal Flooding Impacts through Next Week. Coastal Flood Warning St. Johns River Downtown JAX to Welaka Inundation near 2 ft agl. Coastal Flood Advisory for Coast & ICW. Extended Duration Tidal Flood Expected for St. Johns River Basin - Hazardous Marine & Surf Zone Conditions through the Weekend. Small Craft Advisory through Tonight, again Friday and Saturday. High Rip Current Risk, Rough Surf, Elevated Tides and Beach Erosion - Heavy Rainfall Returns Friday & Saturday with Severe Storm Potential Near Term - Through Tonight Main HighligheightsToday And Tonight - Flood Threat from Heavy Downpours Continues Today for Coastal Northeast FL and Camden County, GA - Coastal and Marine Impacts Continue, Including Coastal Flood Warning for Upstream St. Johns River Nearly stationary boundary remains draped just south of our region, and has been generally nudging further southward throughout the day today as high pressure ridging is trying to make more of a push from our north. Main impact today will be more of a presence of drier air across southeast GA and to a small extent over northeast FL, which can already be seen on satellite imagery with breaks in the persistent low clouds. With onshore flow continuing just north of the front, showers with occasional heavy rainfall and perhaps a few rumbles of thunder will continue across a large portion of the area today similar to yesterday. The main difference being the highest PoPs and potential for heavy rainfall/flooding will shift slightly southward with the front, with generally from Saint Augustine to Gainesville and areas south being the primary impact zone. Showers will be more isolated near the I-10 corridor today, which is good news for Duval County where some areas have received 4-8+ inches of rain over the past 24 hours. Aside from rainfall and breezy onshore winds, the other primary impact continues to be coastal/marine/St. Johns River flooding, with Coastal Flood Advisories continuing for the entire coast and St. Johns River east of Downtown JAX to Mayport, where about 1-1.5 feet of water above normally dry ground is expected at times of high tide. South of the JAX area, opted to upgrade to a Coastal Flood Warning based on trends and other ground truth, as water levels near or just above 2 feet above normally dry ground is forecast, and has already occurred in a few areas. This threat is expected to continue through at least Thursday Morning's high tide. Rip current risk also continues to be high at all area beaches. Drier air will only make it to about the FL/GA border tonight before a shift in the pattern is expected Thursday onward (more on that below), which will also suppress coastal showers just a bit overnight. Chances will mainly be confined to similar areas as during the day today, but overall around 10-20% less. With breaks in the sun today, especially across southeast GA, these areas will see temps a few degrees higher than average. Generally looking at low 80s over inland GA and the upper Suwannee Valley area, and mid 70s to around 80 elsewhere. Short Term - Thursday Through Friday Night Main Highligheights This Period: - Heavy rainfall potential Thursday in North-Central Florida, expanding northward through Friday - Onshore winds strengthening through Friday, increasing surf zone risk and continue tidal flooding within the St Johns River and along the Atlantic coast. An uneven stalled frontal zone will be situated across central FL through the end of the week. The position of the front and a wave of low pressure developing off the eastern FL coast will continue to bring gusty winds along the coast through the end of the week. Dry air will limit rain chances north of I-10 through Thursday before steering flow turns more southerly by Friday, allowing for deeper moisture to gradually lift northward with the developing warm front. Influence from Tropical Cyclone Isaias is expected for Friday while the pressure gradient tightens between the storm and an area of high pressure along the Mid Atlantic. Strengthening onshore flow will likely result in rough surf conditions, rip currents, and continue a 'reverse flow' with elevated tides in St Johns River and intracoastal waterway. After a slight "break" in the soggy conditions Thursday, the potential for training downpours off the Atlantic may result in the consideration of Flood Watches for coastal areas on Friday. Hurricane Isaias path is expected to make a turn to the north and push toward the northern Gulf Coast. At this time, the main impacts are expected to be additional heavy rain potential Friday where the Weather Prediction Center already has a "Marginal" (5%) risk of flash flooding. Not much change in the temperature ranges to end the week with abundant cloud cover keeping afternoon highs generally in the upper 70s to low 80s while overnight lows will be in the upper 60s and low 70s. Long Term - Saturday Through Tuesday Main Highligheights This Period: fri-mon - Flood risk and strong to severe thunderstorm risk on Saturday as Tropical Cyclone Isaias lifts north across the Gulf coast. Strong southerly flow in response to the fast-moving tropical storm moving northward into the lower Mississippi region this weekend will result in warming temperatures and destabilizing airmass this weekend as the pseudo warm front lifts across the region. As a result of the storm trajectory of Tropical Storm Isaias, it is possible that the pseudo warm front evolving with the passing system as it undergoes extratropical transition may hang up across the region on Saturday. Forecast soundings and hodographs do indicate low level veered flow, which may favor some organized thunderstorms embedded along the fringe bands of Isaias. Being in the dynamically favored quadrant, a few organized thunderstorms and potential tornadoes can develop Saturday afternoon. Additionally, the deep tropical moisture and heavy rain rates and wet antecedent conditions will likely yield a flood risk through the weekend as well. Next week, a trailing cold front behind the remnant tropical low will push across the area bringing dry weather, clearing skies, and warmer temperatures. Marine Small Craft Advisory conditions spread southward into the northeast Florida waters today. Prolonged onshore winds continue as weak low pressure off the east central Florida coast moves slowly eastward today and Thursday maintaining breezy northeasterly winds. Onshore winds may briefly decrease Thursday before strengthening back to Small Craft Advisory levels by late Friday as high pressure builds over the Mid-Atlantic states and wedges down the southeastern seaboard. The National Hurricane Center is monitoring Tropical Storm Isaias in the southwestern Gulf. This system is expected to move northward towards the central Gulf coast region Friday into Saturday. Showers and thunderstorms will increase in coverage throughout our local waters during the weekend as tropical moisture surges northward on the eastern periphery of this tropical system. Rip Currents A northeasterly wind surge persisting along the Georgia and northeast FL coast through today will result in strong rip currents and rough surf. High Risk for Rip Currents will likely continue through this weekend with continued breezy onshore flow. Fire Weather - Areas Of Low Daytime Dispersions Inland Ne Fl Today Soggy conditions will limit fire weather concerns. Strong northeast winds will persist and gradually shift easterly through the end of the week with gusts strongest at the coast, up to 35 mph at times. Limited mixing due to thick overcast will keep smoke dispersion low to poor through the rest of the week and likely into the weekend. Due to elevated coastal winds, high overnight dispersions are expected. Waves of heavy rain will become focus south of I-10 Thursday, expand northward into southeast GA Friday. Increasing potential for thunderstorms this weekend as Hurricane Isaias tracks northward into the Gulf coast. Fog Potential: Heavy rainfall combined with saturated soils will likely produce localized flash flooding along the coast today. Dense fog formation is not expected over the next few days. Hydrology Flood Watch has been cancelled for coastal areas accordingly, as coverage generally shifts southward towards areas that have received significantly less rainfall so far. Waves of convergent bands could continue to bring moderate to heavy rainfall at times for Northeast Florida coastal areas, which may result in localized flooding from rainfall continuing at times. These areas have received 2-6+ inches in the past 24 hours. Portions of the St Marys, Satilla, Santa Fe and Alapaha Rivers have risen into flood stage in response to widespread 4 to 8 inch rainfall over the last several days. Most locations are not expected to rise into flood over the next several days due to the dry conditions and low water levels prior to this recent bout of heavy rain. However, portions of the Satilla and St Marys have reached Minor Flood stage but are generally beginning to peak. With a break in the heavy rain over the next few days, river levels are expected to gradually lower below flood. Tides / Coastal Flooding A Coastal Flood Advisory remains in effect through Thursday Morning for the Atlantic Coast and St. Johns River east of Jacksonville. Advisory has been upgraded to a Coastal Flood Warning for the St. Johns River south of Jacksonville, as observations and forecasts have trended towards "moderate" flood potential at peak high tides (tidal levels about 1.75 to 2.25 feet above normally dry ground at times of high tide in these areas) through the end of the week. Given the freshwater rainfall over the last 24 hours, it's possible that runoff will exacerbate tidal flooding with high tide. NOAA Jacksonville FL Office: Watches - Warnings - Advisories FL...Flood Watch until 6pm EDT this evening for FLZ024-038-124-125- 132-137-138-225-233-325-333-425-433-533-633. Coastal Flood Advisory until 5pm EDT Thursday for FLZ124-138- 233-333. High Risk for Rip Currents through late Saturday night for FLZ124- 125-138-233-333. Coastal Flood Advisory until 2pm EDT Saturday for FLZ125-225. Coastal Flood Warning until 5pm EDT Thursday for FLZ132-137- 325-633. Coastal Flood Advisory from 5pm Thursday to 2pm EDT Saturday for FLZ132-137-325-633. GA...Flood Watch until 6pm EDT this evening for GAZ165-166. Coastal Flood Advisory until 5pm EDT Thursday for GAZ154-166. High Risk for Rip Currents through late Saturday night for GAZ154- 166. Marine Small Craft Advisory until 2am EDT Thursday for AMZ450-452- 470-472. Small Craft Advisory until 2am EDT Thursday for AMZ454-474.. |
Jacksonville Radar
Southeast Radar