Mazatlan to Banderas Bay Forecast
September 20, 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.
...STORM WARNING...
.WITHIN 12N103W TO 14N106W TO 12N105W TO 08N107W TO 06N106W TO
08N104W TO 12N103W S WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST LOW PRESSURE...POSSIBLE TROPICAL
CYCLONE...NEAR 15N106W. WITHIN 16N105W TO 16N106W TO 15N107W TO
15N106W TO 15N105W TO 16N105W W WINDS 25 TO 35 KT. SEAS 2.5 TO
4.5 M. WITHIN 16N104W TO 17N106W TO 15N108W TO 12N107W TO 12N104W
TO 13N103W TO 16N104W SW WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.
.45 HOUR FORECAST WITHIN 16N103W TO 16N104W TO 15N104W TO 16N103W
NW TO N WINDS 40 TO 50 KT. SEAS 4.0 TO 5.5 M. WITHIN 15.5N103W
TO 15.5N103.5W TO 15N104W TO 15N103.5W TO 15.5N103W SW WINDS 30
TO 40 KT. SEAS 4.0 TO 5.5 M. WITHIN 15N102W TO 17N103W TO 17N105W
TO 15N107W TO 12N106W TO 12N103W TO 15N102W W WINDS 20 TO 30 KT.
SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST LOW PRESSURE...POSSIBLE TROPICAL CYCLONE...NEAR
15N103W. LITTLE CHANGE.
MODERATE TO FRESH NW WINDS AND MODERATE SEAS PREVAIL ACROSS THE
BAJA CALIFORNIA OFFSHORES N OF CABO SAN LAZARO. OTHERWISE, EXCEPT
FOR THE GUERRERO AND MICHOACAN OUTER OFFSHORES WHERE WINDS AND
SEAS ARE STARTING TO DETERIORATE DUE TO INVEST EP99, MODERATE OR
WEAKER WINDS ARE ELSEWHERE ALONG WITH MODERATE SEAS. SLIGHT SEAS
PREVAIL ALONG THE GULF OF CALIFORNIA.
WESTERN EAST PACIFIC (EP98): SHOWERS AND THUNDERSTORMS
ASSOCIATED WITH AN AREA OF LOW PRESSURE LOCATED WELL SOUTHWEST OF
THE BAJA CALIFORNIA PENINSULA ARE BECOMING BETTER ORGANIZED.
ENVIRONMENTAL CONDITIONS ARE CONDUCIVE FOR DEVELOPMENT, AND A
TROPICAL DEPRESSION IS EXPECTED TO FORM OVER THE NEXT DAY OR SO
AS IT MOVES WESTWARD TO WEST-NORTHWESTWARD AT 10 TO 15 KT ACROSS
THE WESTERN EAST PACIFIC. THERE IS A HIGH CHANCE OF TROPICAL
CYCLONE FORMATION IN THE NEXT 48 HOURS.
FOR THE FORECAST, ASIDE FROM CONDITIONS ASSOCIATED WITH INVEST
EP99, MODERATE TO LOCALLY FRESH NW WINDS WILL PREVAIL ACROSS THE
OFFSHORE BAJA CALIFORNIA WATERS THROUGH EARLY FRI MORNING WHEN
CONDITIONS IN BAJA CALAIFORNIA SUR OFFSHORES WILL START TO
DETERIORATE DUE TO THE PROXIMITY OF INVEST EP99.
SHORT-TERM MAZATLAN TO BAHIA BANDERAS
TODAY - SSW 6-7, Seas SSW 0-1.9 ft @ 7sec
TONITE - W 2-3, Seas SSW 0-1.3 ft @ 7sec
MONDAY - WNW 6-8, Seas S 0.7-2.1 ft @ 9sec
MONDAY NIGHT - NNE 2-3, Seas S 0-2.3 ft @ 8sec
LONG-TERM MAZATLAN TO BAHIA BANDERAS
TUESDAY - W 4-5, Seas S 0-2.3 ft @ 8sec
WEDNESDAY - SW 5-6, Seas S 0.9-2.3 ft @ 12sec
THURSDAY - WNW 9-11, Seas S 0-3.5 ft @ 13sec
FRIDAY - W 7-9, Seas SW 0-3.3 ft @ 13sec
SATURDAY - WSW 6-7, Seas SSW 0-5.4 ft @ 12sec