Mazatlan to Banderas Bay Forecast
August 27, 2026, 2:00 am (UTC: -05:00)
Subject: Mazatlan to Banderas Bay Forecast
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This forecast has not been reviewed. It was generated from an automatic model.
WARNINGS
.NONE.
POST-TROPICAL CYCLONE ISELLE IS WELL BEYOND THE OFFSHORE WATERS
OF BAJA CALIFORNIA. OUTER ASSOCIATED SWELLS OF 7 TO 8 FT ARE
IMPACTING THE FAR BAJA CALIFORNIA NORTE WATERS NEAR THE OUTER
OFFSHORE BOUNDARY. MEANWHILE, FRESH TO STRONG NORTHERLY GAP WINDS
CONTINUE TO BLOW IN THE GULF OF TEHUANTEPEC WITH SEAS TO 8 FT.
WINDS ARE MODERATE OR WEAKER ELSEWHERE WITH MAINLY MODERATE SEAS,
EXCEPT SLIGHT IN THE GULF OF CALIFORNIA. ACTIVE SHOWERS AND
THUNDERSTORMS ARE PRESENT OVER THE OUTER OFFSHORE WATERS AREAS OF
SOUTHERN AND SOUTHWESTERN MEXICO AS DESCRIBED WITH INVEST EP93
IN THE SPECIAL FEATURES SECTION ABOVE WITH LOCALLY HIGHER WINDS
AND SEAS POSSIBLE THERE.
FOR THE FORECAST, THE AREA OF LOW PRESSURE, INVEST EP93, CENTERED WELL
SOUTHWEST OF SOUTHERN MEXICO HAS A CHANCE FOR TROPICAL CYCLONE
FORMATION, BUT STAY OUTSIDE OF THE OFFSHORE WATERS AS IT MOVES
WES-NORTHWESTWARD AT 10 TO 15 KT SUN. THE CENTER OF THE LOW
PRESSURE WILL MAKE ITS CLOSEST POINT OF APPROACH WITHIN 120 NM TO
THE SOUTHWEST OF CLARION ISLAND FRI NIGHT INTO SAT. MEANWHILE,
OUTER ROUGH SWELLS ASSOCIATED WITH TROPICAL STORM ISELLE WILL
CONTINUE TO SUBSIDE THROUGH TONIGHT AS THE SYSTEM CONTINUES TO
PULL AWAY FROM THE OFFSHORE WATERS OF BAJA CALIFORNIA WHILE
WEAKENING. FRESH TO STRONG NORTHERLY GAP WINDS WILL CONTINUE TO
PULSE IN THE GULF OF TEHUANTEPEC THROUGH EARLY SUN WITH LOCALLY
ROUGH SEAS THERE AT TIMES. A SURGE OF FRESH TO STRONG
SOUTHEASTERLY WINDS LIKELY ASSOCIATED WITH CONVECTIVE COMPLEXES
MAY MOVE UP THE CENTRAL AND NORTHERN GULF OF CALIFORNIA BOTH FRI
AND SAT NIGHTS. LOOKING AHEAD, ANOTHER AREA OF LOW PRESSURE COULD
FORM THIS WEEKEND WELL TO THE SOUTH OF SOUTHWESTERN MEXICO.
ENVIRONMENTAL CONDITIONS APPEAR FAVORABLE FOR SOME GRADUAL
DEVELOPMENT OF THIS SYSTEM, AND A TROPICAL DEPRESSION COULD FORM
BY EARLY NEXT WEEK WHILE IT MOVES WESTWARD TO WEST-NORTHWESTWARD
AT 10 TO 15 KT.
POST-TROPICAL CYCLONE ISELLE IS CENTERED NEAR 23.0N 125.9W AT
27/0300 UTC, MOVING WEST-NORTHWEST AT 8 KT. ESTIMATED MINIMUM
CENTRAL PRESSURE IS 1002 MB. MAXIMUM SUSTAINED WIND SPEED IS 30
KT WITH GUSTS TO 40 KT. PEAK SEAS ARE CURRENTLY AROUND 14 FT
(4.5 M). NO SIGNIFICANT CONVECTION IS NOTED NEAR THE CENTER OF
ISELLE. ISELLE SHOULD CONTINUE TO MOVE WEST-NORTHWESTWARD OVER THE NEXT
COUPLE OF DAYS, STEERED BY A MID-LEVEL RIDGE TO THE NORTH OF THE
CYCLONE. INCREASING WIND SHEAR, COOLER SEA SURFACE TEMPERATURES, AND
A DRIER AIR MASS WILL CONTINUE TO WEAKEN THE SYSTEM. THE
POST-TROPICAL REMNANT LOW IS EXPECTED TO GRADUALLY SPIN DOWN
AND OPEN INTO A TROUGH IN ABOUT 2 TO 3 DAYS. SWELLS GENERATED BY
ISELLE WILL CONTINUE TO AFFECT THE WEST COAST OF THE BAJA
CALIFORNIA PENINSULA FOR A COUPLE MORE DAYS. THESE SWELLS ARE
LIKELY TO CAUSE LIFE- THREATENING SURF AND RIP CURRENT
CONDITIONS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER
OFFICE. PLEASE READ THE LATEST HIGH SEAS FORECAST ISSUED BY THE
NATIONAL HURRICANE CENTER AT WEBSITE -
HTTPS://WWW.NHC.NOAA.GOV/TEXT/MIAHSFEP2.SHTML AND THE LATEST
ISELLE NHC FORECAST/ADVISORY AND PUBLIC ADVISORY AT
WWW.HURRICANES.GOV FOR MORE DETAILS.
SHORT-TERM MAZATLAN TO BAHIA BANDERAS
TODAY - N 10-12, Seas SSW 0-3 ft @ 18sec
TONITE - SW 6-7, Seas SSW 0-3.4 ft @ 17sec
FRIDAY - WSW 9-11, Seas SSW 0-4.2 ft @ 18sec
FRIDAY NIGHT - WSW 4-5, Seas SSW 0-5.3 ft @ 17sec
LONG-TERM MAZATLAN TO BAHIA BANDERAS
SATURDAY - NE 7-9, Seas SSW 0-5.8 ft @ 16sec
SUNDAY - N 8-10, Seas SSW 0-5.3 ft @ 15sec
MONDAY - NNE 9-11, Seas SSW 0-4.2 ft @ 14sec
TUESDAY - NNW 7-9, Seas SSW 0-4 ft @ 13sec
WEDNESDAY - WSW 7-9, Seas SSW 0-3.3 ft @ 16sec