Marine Weather and Tide Forecast for Miramar Beach, FL

SHORT TERM
(Today and Tonight) Issued at 241 AM EDT Mon Aug 17 2026

We're still firmly locked into this unrelenting heat wave for much of this week. The main highlight for today is the Extreme Heat Warning for parts of the FL Panhandle and Central FL Big Bend where heat indices near or above 113 degrees are expected. A Heat Advisory is in place everywhere else for heat indices between 108 & 112 degrees. These hazards go into effect from 11AM EDT/10AM CDT to 8PM EDT/7PM CDT. Actual high temperatures are forecast to be in the mid to upper 90s (isolated 100 is possible). Upper 70s to around 80 degrees for overnight lows are hardly an improvement.
The only relief has to come from thunderstorms, for which coverage looks scattered at best, primarily focusing across the afternoon seabreeze around the I-10 corridor. Convection will be capable of strong-gusty winds, frequent lightning, and locally heavy rainfall.

LONG TERM
(Tuesday through Sunday) Issued at 241 AM EDT Mon Aug 17 2026

Expect additional heat products to be issued through before this weekend consisting of a likely mix between Heat Advisory and Excessive Heat Warning for widespread dangerously high heat indices in the 110s. High temperatures well above 90 degrees and lows no lower than mid 70s will continue to be common with readings around 100 degrees on Thursday. The latter appears to be accompanied by relatively lower dew points from drier NW flow which may confine hazardous heat mainly our FL counties.

By Friday, SW flow becomes re-established, which would allow dew points to rebound in SE AL & SW GA, and raise heat indices closer to advisory levels once again for perhaps the final time of this prolonged stretch. Overall, the large-scale pattern shifts in the second half of the long-term period as the heat wave ridge retrogrades westward in response to a digging northern stream upper trough across the Eastern US. This feature sends a frontal boundary our way this weekend and serve as a catch-22 by offering some heat relief, but also likely enhancing convection.

AVIATION
(18Z TAFS)
Issued at 129 PM EDT Mon Aug 17 2026

Isolated to scattered storms will develop this afternoon into early evening. Highest probs for TSRA will be TLH and VLD with lower probs elsewhere. VFR outside of convection and tempo MVFR in and near convection. Winds will generally be from the southwest, gusty near storms.

MARINE
Issued at 241 AM EDT Mon Aug 17 2026

Persistent high pressure maintains favorable boating conditions the next several days outside of thunderstorms and potentially fair- weather morning waterspouts. Prevailing gentle to moderate west winds are forecast with daily afternoon seabreezes across the immediate nearshore legs.

FIRE WEATHER
Issued at 241 AM EDT Mon Aug 17 2026

The main fire concerns continue to be hazardous heat conditions persisting through at least mid week, daily chances for afternoon thunderstorms, and high dispersions in SE AL and parts of SW GA both Tuesday and Wednesday afternoon.

High temperatures well into the 90s will be common with heat indices of 108 to 115+ degrees.

Thunderstorms will be capable of frequent lightning, gusty/erratic winds, and locally wetting rains are additional threats.

Prevailing west to NW winds are forecast outside of daily afternoon seabreezes.

HYDROLOGY
Issued at 241 AM EDT Mon Aug 17 2026

Thunderstorms will be capable of producing localized nuisance flooding in urban, poor-drainage, and low-lying areas. Otherwise, there are no significant hydrological concerns the next several days. All area rivers are currently running well below action stage.

SPOTTER INFORMATION STATEMENT

Spotter activation is not requested. However, spotters are always encouraged to safely report significant weather conditions when they occur by calling the office or tweeting us @NWSTallahassee.

PRELIMINARY POINT TEMPS/POPS
Tallahassee 97 78 98 78 / 50 10 60 10 Panama City 93 82 94 82 / 20 10 40 10 Dothan 98 77 97 75 / 30 10 20 10 Albany 99 77 98 75 / 20 10 10 10 Valdosta 97 77 98 76 / 30 10 40 10 Cross City 95 78 94 78 / 30 10 50 20 Apalachicola 93 81 93 82 / 20 10 40 10

TAE WATCHES/WARNINGS/ADVISORIES
FL...Heat Advisory until 8 PM EDT /7 PM CDT/ this evening for FLZ007>011-018-019-028-029-034-128-134.

Extreme Heat Warning until 8 PM EDT /7 PM CDT/ this evening for FLZ012>017-027-108-112-114-115-118-127-326-426.

High Rip Current Risk through late tonight for FLZ112-114.

GA...Heat Advisory until 8 PM EDT this evening for GAZ120>131-142>148- 155>161.

AL...Heat Advisory until 7 PM CDT this evening for ALZ065>069.

GM...None.