Fernandina Beach to St. Augustine, FL 20 - 60 NM Marine Forecast
| Rest Of Tonight...East Winds 10 To 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 4 Feet At 9 Seconds And Northeast 3 Feet At 7 Seconds. Intracoastal Waters A Moderate Chop. A Slight Chance Of Showers This Evening. Patchy Dense Fog. |
| Tuesday...Northeast Winds Around 10 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 4 Feet At 9 Seconds And Northeast 3 Feet At 6 Seconds. Intracoastal Waters Light Chop. Patchy Dense Fog. |
| Tuesday Night...East Winds 5 To 10 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 4 Feet At 9 Seconds And Northeast 3 Feet At 7 Seconds. Intracoastal Waters Light Chop. A Slight Chance Of Showers In The Evening. |
| Wednesday...East Winds 5 To 10 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 4 Feet At 9 Seconds And Northeast 3 Feet At 7 Seconds. Intracoastal Waters Light Chop. A Slight Chance Of Showers In The Afternoon. |
| Wednesday Night...Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 9 Seconds And Northeast 2 Feet At 8 Seconds. Intracoastal Waters A Moderate Chop. |
| Thursday...Southeast Winds 5 To 10 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 9 Seconds And Northeast 2 Feet At 9 Seconds. Intracoastal Waters Light Chop. A Slight Chance Of Showers In The Afternoon. |
| Thursday Night...Southeast Winds 10 To 15 Knots, Diminishing To 5 To 10 Knots After Midnight. Seas 4 To 5 Feet, Occasionally To 6 Feet. Intracoastal Waters A Moderate Chop. |
| Friday...Southeast Winds 5 To 10 Knots, Increasing To 10 To 15 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Intracoastal Waters A Moderate Chop. A Slight Chance Of Showers In The Afternoon. |
| Saturday...Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Intracoastal Waters A Moderate Chop. |
| Area Forecast Discussion National Weather Service Jacksonville FL 709pm EST Monday Mar 2 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 - Areas of Dense Fog & Sea Fog Tonight and Early Tuesday Morning. Sea Fog expands onshore Tonight. Nightly Areas of Dense Fog Likely through the Week - Extended Period of Breezy Onshore Winds This Week. Elevated Surf and High Risk for Rip Currents Likely by Tuesday and Wednesday - Record High Temperatures Later This Week Dense sea fog has once again expanded onshore to coastal areas north of St. Augustine this evening lowering visibilities to less than a mile prompting Dense Fog Advisories. Fog/stratus will continue to expand inland through the night along the I-95 corridor and St. Johns river basin. Dense Fog Advisories will likely need to be expanded later tonight. .NEAR TERM /UNTIL 7am TUESDAY MORNING/... WEATHER CONCERNS THROUGH TONIGHT: - Dense fog near the Southeast Georgia coast this evening and inland north of I-10 overnight Temperatures will rise into the 70s to near 80 inland, with slightly cooler temperatures near the Atlantic coast as onshore winds continue. Cloud cover will increase overnight, especially over southeast Georgia, with low temps in the 50s areawide. Heavy cloud cover is currently making way southward down the Georgia coast, as onshore winds push clouds inland elsewhere. Fog will begin to develop near the southeast Georgia coast this evening, with coverage expanding southward and inland throughout the night. The highest chances for dense fog will be near the coast this evening then inland towards sunrise, generally north of I-10. Fog will begin to clear after sunrise. .SHORT TERM /7am TUESDAY MORNING THROUGH WEDNESDAY NIGHT/... Main Highligheights During the Period: - Nightly Fog, Possibly Locally Dense - Moderate to High Rip Currents Mid to upper level ridging will build over the region through this period, with the geopotential heigheights from 850 mb to 500 mb rising to the 90th percentile of climatology, telling us that the temps will be well above normal. The airmass remains largely dry with PWATs (Precipitable Waters) below 1 inch Tuesday but may rise to about 0.8 or 1 inch on Wednesday as the mean layer high center moves offshore of the southeast CONUS and provides a more moist southeasterly flow. At the surface, the ridge axis will remain to the north of the area over the Carolinas keeping an easterly and then southeasterly wind flow later on the period. Models gradually nudge up dewpoints which will be more favorable for some fog development at night and early morning. Not surprisingly, the NBM is suggesting more foggy conditions Tuesday night and Wednesday night. Dense fog is likely in some locations and primary areas of concern will be along the coastal counties and parts of southeast GA where boundary layer winds are lighter. However, certainly could see some dense fog over parts of northeast FL. A few showers possible over the coastal waters mainly offshore as a weak inverted surface forms Tue-Wed. Max temps lower 80s inland on Tuesday, go to the mid 80s by Wednesday. Coastal areas will be several degrees cooler due to onshore flow. Lows mild from about 50-55 inland around 60 coast. Long Term - Thursday Through Monday Main Weather Highlights: - Record High Temperatures possible Thursday through the Weekend - Isolated Thunderstorms possible over the Weekend Deep layer high pressure system will remain east of the area keeping a southeast and south 1000-500 mb flow for the area. PWATs (Precipitable Waters) may rise up to about 1.2 inches which may support a few showers during the peak heating, but t-storm chances are below 5-10 percent given the subsidence aloft. Best chance of showers will be near the I-75 corridor Thursday and Friday based on both the NBM and latest GFS. During the weekend and early next week, the ridge aloft becomes weaker and modest instability may develop to encourage an isolated storm or two during the afternoon hours. Periods of sea fog will also be possible due to the warm, moist air moving over the cool coastal waters. Otherwise, not much change to the forecast of above normal temps, probably near record or record temps from Thursday into the weekend. See the climate section for the current record information for the climate sites. Marine Dense sea fog across the nearshore waters will likely linger into mid-late Tuesday morning hours. High pressure will strengthen to the north northeast tonight, as a coastal trough develops over the waters. The high will move more toward the northeast Tuesday and Wednesday, with the coastal trough gradually weakening. The high will be centered to the east northeast Thursday into the weekend, with the ridge extending across forecast area. Rip Currents Moderate risk of rip currents expected at area beaches with some persistent onshore flow and surf height around 2 to 4 feet. Rip current risk increases later today into Tuesday as onshore flow strengthens. Fire Weather - Areas Of High Dispersions Inland Today A pattern shift with strong mid to upper level ridge building across the region this week and will lead to near record temperatures Thursday and Friday. Critical weather conditions don't appear to align through the next week, but the transition to moist, and mildly unstable, airmass later this week may lead to a moderate sea breeze. There is some potential for scattered showers and isolated thunderstorms for inland districts over the weekend. FOG POTENTIAL AND OTHER REMARKS: Areas of dense fog possible early Tuesday and Wednesday mornings. Patchy fog to areas of fog possible again Thursday morning. Climate Record High Temperatures: March 4: KAMG: 86/1961 March 5: KJAX: 87/2020 KGNV: 87/1997 KAMG: 87/1989 March 6: KGNV: 87/2023 KAMG: 86/1961 March 7: KGNV: 88/2023 KAMG: 86/1956 March 8: KJAX: 88/1945 KGNV: 88/1921 KAMG: 86/1974 Record High Minimum Temperatures: March 7: KGNV: 66/1935 March 8: KGNV: 65/1973. NOAA Jacksonville FL Office: Watches - Warnings - Advisories FL...Dense Fog Advisory until 8am EST Tuesday for FLZ124-125. GA...Dense Fog Advisory until 8am EST Tuesday for GAZ154-166. Marine Dense Fog Advisory until 8am EST Tuesday for AMZ450-452. |
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