Fernandina Beach to St. Augustine, FL 20 - 60 NM Marine Forecast
| Rest Of Today...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 7 Seconds. A Slight Chance Of Showers And Thunderstorms. |
| Tonight...Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 7 Seconds. A Slight Chance Of Showers And Thunderstorms In The Evening. |
| Friday...East Winds 10 To 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Southeast 4 Feet At 7 Seconds. A Chance Of Showers And Thunderstorms. |
| Friday Night...Southeast Winds 10 To 15 Knots, Diminishing To 5 To 10 Knots After Midnight. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Southeast 5 Feet At 8 Seconds. A Slight Chance Of Showers And Thunderstorms In The Evening, Then Showers Likely With A Chance Of Thunderstorms After Midnight. |
| Saturday...Southeast Winds 5 To 10 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 8 Seconds. A Chance Of Thunderstorms. Showers Likely, Mainly In The Morning. |
| Saturday Night...South Winds 5 To 10 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: East 4 Feet At 8 Seconds. A Slight Chance Of Thunderstorms. A Slight Chance Of Showers In The Evening, Then A Chance Of Showers After Midnight. |
| Sunday...South Winds 5 To 10 Knots. Seas Around 3 Feet. A Chance Of Showers And Thunderstorms In The Morning. A Slight Chance Of Showers And Thunderstorms Through The Night. |
| Monday...South Winds 5 To 10 Knots. Seas 2 To 3 Feet. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Jacksonville FL 136pm EDT Thu August 6 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 - Scattered Thunderstorms Each Day Through the Weekend. Strong Storm Potential Each Afternoon and Evening. Daily Rounds of Heavy Downpours May Cause Localized Flooding. - Increasing Rip Current Potential Friday Through the Weekend Near Term - Through Tonight Main Highligheights through Tonight: - Isolated strong storms possible this afternoon into evening A pattern shift is ongoing, with onshore winds keeping coastal high temperatures below 90 today and shifting focus for storms further inland as the Atlantic sea breeze pushes west this afternoon. Over most inland areas, scattered to numerous showers and storms are expected this afternoon and evening, with potential as well for a few isolated strong storms. DCAPE is not super impressive, but there is plenty of surface instability present. The primary hazard would be gusty winds around 40-50 mph, however with higher PWATs (Precipitable Waters) any training/slow moving storms may pose a localized flooding risk, especially over typical flood prone areas. Convection will wane off after sunset, with some lingering activity possible over north central Florida. Tonight, some patchy inland fog will be possible near locations that receive heavy rainfall today. Short Term - Friday Through Saturday Night Main Highligheights This Period: - Daily Thunderstorms with Locally Heavy Rainfall - High Risk for Rip Currents Northeast FL Beaches Friday An inverted trough with above average precipitable water over 2.2" sweeps over the FL peninsula Friday and extends northward across southeast GA into Saturday. Southeast steering flow 10-15 kts Friday will bring morning coastal showers and isolated storms with coverage expanding inland into the afternoon. Greater storm coverage will be across northeast FL where moisture will be increasing from the south. Inland showers and storm fade Friday evening, but coastal convection will continue through the night as the trough axis approaches. Saturday, steering flow shifts more to the south but weakens to less than 10 kts with high moisture lingering over northeast FL and also expanding across southeast GA. The deep moisture, weak storm motion, lingering low level inverted trough and diurnal instability will bring the risk of localized heavy rainfall as afternoon and evening showers and storms increase in coverage. At this time, the Weather Prediction Center has the local area highlighted under a Marginal Risk (level 1 out of 4) of flash flooding rainfall on Saturday. High temperatures will trend average in the lower 90s inland the upper 80s to near 90 coast with daily peak heat index values near 100. Muggy and mild overnight lows will range in the 70s. Long Term - Sunday Through Wednesday Main Highligheights This Period: - Daily Thunderstorms - Heat Advisory Potential Returns Next Week High pressure builds across the FL peninsula early next week with extended models diverging mid to late week regarding how fast the ridge breaks down and yields to troughing trying to carve southward down the southeast Atlantic sea board. Extended consensus favors a local warming trend in temperatures and increasing dew pts with southwest low level flow off of the Gulf of America increasing local heat index values Monday to Wednesday to near local Heat Advisory criteria with heat index values 108-110 deg possible. Daily thunderstorm chances will trend lower than average given the upper ridge bringing increased subsidence and drier mid/upper level air Monday to Wednesday. Even given isolated storms, they could be strong given high DCAPE and capable of strong wet downbursts. Marine High pressure centered over Bermuda will build westward toward the United States east coast through the weekend shifting flow from east and southeast today to more east late this week and into the upcoming weekend. A trough of low pressure will move into the area on Friday, which will increase east winds up to 15 knots with seas building to near 5 feet from Friday into Saturday. Daily rounds of showers and thunderstorms will also continue, some of which will produce strong gusty winds, heavy rain, and frequent lightning strikes. Rip Currents A wind shift to a more southeast/onshore flow along with some increase in wind waves will build surf/breakers to 2-3 feet today with a Moderate rip current risk expected. Friday into the weekend sees potential surf/breakers of 3-4 feet and corresponding increased rip current risk. Fire Weather Prevailing southeast winds Friday with morning showers and isolated coastal storms shifting inland through the afternoon and early evening expanding in coverage especially across northeast Florida. Breezy southeast winds will impact coastal areas Friday. There will be an increase in shower and storms Saturday with a weak front lingering over the area under light southerly winds. Daytime dispersion will be generally good Friday then generally good to fair Saturday with increased rainfall across the area. Humidity will remain above critical values. Fog Potential: Significant fog development is not expected, with shallow, patchy fog late overnight limited to areas that receive locally heavy rainfall. NOAA Jacksonville FL Office: Watches - Warnings - Advisories FL...None. GA...None. Marine None. |
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