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| Heat Advisory issued August 20 at 1:08AM EDT until August 20 at 6:00PM EDT by NWS Miami FL | ||
| NWS Miami FL | ||
| Category | Certainty | Severity |
| Met | Likely | Moderate |
| Status | Urgency | Category |
| Actual | Expected | Met |
| Effective | Ends | Expires |
| 08/20/2026 01:08 AM | 08/20/2026 06:00 PM | 08/20/2026 06:00 PM |
* WHAT...Heat index values up to 110 expected.
* WHERE...Portions of southeast, southern, and southwest Florida.
* WHEN...From 11 AM this morning to 6 PM EDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
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Hourly Forecast
Thu, 02:00 AM
Partly CloudyWinds: 1 mph SW
Thu, 03:00 AM
Partly CloudyWinds: 1 mph SW
Thu, 04:00 AM
Partly CloudyWinds: 1 mph W
Thu, 05:00 AM
Mostly ClearWinds: 1 mph W
Thu, 06:00 AM
SunnyWinds: 1 mph W
Thu, 07:00 AM
SunnyWinds: 1 mph W
Thu, 08:00 AM
SunnyWinds: 1 mph W
Thu, 09:00 AM
SunnyWinds: 1 mph W
Thu, 10:00 AM
SunnyWinds: 1 mph W
Thu, 11:00 AM
SunnyWinds: 2 mph S
Thu, 12:00 PM
SunnyWinds: 5 mph SE
Thu, 01:00 PM
Slight Chance Showers And ThunderstormsWinds: 6 mph E
Thu, 02:00 PM
Chance Showers And ThunderstormsWinds: 7 mph E
Thu, 03:00 PM
Chance Showers And ThunderstormsWinds: 7 mph SE
Thu, 04:00 PM
Chance Showers And ThunderstormsWinds: 7 mph SE
Thu, 05:00 PM
Chance Showers And ThunderstormsWinds: 7 mph SE
Thu, 06:00 PM
Chance Showers And ThunderstormsWinds: 6 mph S
Thu, 07:00 PM
Chance Showers And ThunderstormsWinds: 5 mph S
Thu, 08:00 PM
Slight Chance Showers And ThunderstormsWinds: 5 mph SW
Thu, 09:00 PM
Slight Chance Showers And ThunderstormsWinds: 3 mph S
Thu, 10:00 PM
Mostly CloudyWinds: 2 mph S
Thu, 11:00 PM
Mostly CloudyWinds: 2 mph S
Fri, 12:00 AM
Mostly CloudyWinds: 2 mph S
Fri, 01:00 AM
Partly CloudyWinds: 2 mph S
Coastal Waters Forecast for Florida
National Weather Service Miami FL
for Jupiter Inlet to Ocean Reef FL out to 60 nm and for East Cape Sable to Bonita Beach FL out to 60 nm.
Atlantic coastal waters from Jupiter Inlet to Ocean Reef out to 60 nm and Gulf coastal waters from East Cape Sable to Chokoloskee out 20 nm and Chokoloskee to Bonita Beach out 60 nm.including the waters of Biscayne Bay and Lake Okeechobee. Seas are provided as a range of the average height of the highest 1/3 of the waves.along with the occasional height of the average highest 10 percent of the waves. A moderate west to northwest breeze will continue across the Gulf waters before becoming gentle on Thursday, while gentle southerly winds prevail across the Atlantic waters through the end of the week. Isolated showers and thunderstorms are possible each morning across the Gulf waters, increasing in coverage in the seabreeze zones each evening. These storms may result in locally hazardous winds and seas. Gulf Stream Hazards: None The approximate location of the west wall of the Gulf Stream as of Aug 17, 2026. 57 nautical miles north northeast of Fowey Rocks. 25 nautical miles northeast of Port Everglades. 9 nautical miles north northeast of Lake Worth. 6 nautical miles east northeast of Jupiter Inlet. This data courtesy of the Naval Oceanographic Office.