Special Marine Warning Issued for Coastal Waters from Fernandina Beach to St. Augustine FL
This alert is no longer in effect.
NOAA issued it on August 20, 2026, 3 days ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Jacksonville has issued a Special Marine Warning for coastal waters from Fernandina Beach to St. Augustine FL out 20 NM until 1:15 AM EDT due to a strong thunderstorm producing wind gusts of 34 knots or greater.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Northeast Florida Coastal Waters
- Issued
- August 20, 2026
- Issuing authority
- NWS Jacksonville FL
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: historical. It was issued 3 days ago; use the issuing agency's live warning service for current conditions in Northeast Florida Coastal Waters.
Alert Details
A Special Marine Warning has been issued by the National Weather Service in Jacksonville FL. The alert is effective from August 20, 2026 at 12:10 AM EDT until August 20, 2026 at 1:15 AM EDT.
Affected Areas
Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM. Locations impacted include Guana River State Park and Palm Valley.
What You Should Do
Move to safe harbor until hazardous weather passes. If your vessel is caught offshore, immediately secure for heavy weather. Ensure all crew members are wearing USCG approved Type I life jackets and nonessential crew are below decks. Deploy jack lines and harnesses if available. Check life saving equipment, including batteries on handheld radios, for readiness.
Expected Conditions
At 12:10 AM EDT, a strong thunderstorm was located near Jacksonville Beach, or 21 nm north of Saint Augustine, moving east at 5 knots. Hazard includes wind gusts 34 knots or greater. Small craft could be damaged in briefly higher winds and suddenly higher waves.
Timeline
The warning is in effect from August 20, 2026 at 12:10 AM EDT until August 20, 2026 at 1:15 AM EDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,148 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 20, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.