Tehuantepec Forecast

April 21, 2026, 3:01 am (UTC: -04:00)
Subject: Tehuantepec Forecast

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This forecast has not been reviewed. It was generated from an automatic model.

WARNINGS
.NONE.

.WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO 15N95W TO 15N94W
TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 30
KT. SEAS 2.5 TO 3.0 M. ELSEWHERE WITHIN 16N94W TO 14N98W TO
12N99W TO 11N96W TO 13N94W TO 16N94W WINDS 20 KT OR LESS. SEAS
2.5 M IN NE TO E SWELL.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

THE TIGHT PRESSURE GRADIENT BETWEEN A 1025 MB HIGH PRESSURE
SYSTEM OVER THE SOUTHERN UNITED STATES AND LOWER PRESSURES IN
THE DEEP TROPICS SUPPORT FRESH TO NEAR GALE-FORCE NORTHERLY WINDS
AND ROUGH SEAS TO 10 FT IN THE GULF OF TEHUANTEPEC. THE FRESH
WINDS AND ROUGH SEAS EXTENDS DOWNSTREAM TO 12N99W.
FOR THE FORECAST, HIGH PRESSURE WILL SUPPORT FRESH TO STRONG N WINDS
AND ROUGH SEAS IN THE GULF OF TEHUANTEPEC THROUGH TUE AFTERNOON.
ELSEWHERE, A SET OF NORTHWEST SWELL WILL MOVE THROUGH THE WATERS
WEST OF BAJA CALIFORNIA NORTE TUE NIGHT INTO WED, BUT WILL BE
SUBSIDING AS IT DOES. SEAS ARE EXPECTED TO PEAK TO AROUND 8 FT WITH
THIS SWELL. FRESH TO LOCALLY STRONG NORTHWEST WINDS ARE FORECAST
OVER THE PACIFIC WATERS OF BAJA CALIFORNIA BEGINNING WED NIGHT.
NORTHWEST WINDS WILL PULSE TO MODERATE TO FRESH SPEEDS AT NIGHT
OFFSHORE SOUTHWESTERN MEXICO TUE THROUGH FRI. ELSEWHERE, MOSTLY
LIGHT TO GENTLE WEST TO NORTHWEST WINDS ARE EXPECTED THROUGH THE END
OF THE WEEK.

SHORT-TERM TEHUANTEPEC
TODAY - N 19-24, Seas SSW 4.1-6.1 ft @ 18sec
TONITE - N 16-20, Seas SSW --? ft @ 18sec
WEDNESDAY - Not available yet
WEDNESDAY NIGHT - Not available yet

LONG-TERM TEHUANTEPEC
THURSDAY - SSW 9-11, Seas SSW 1.6-4.3 ft @ 14sec
FRIDAY - SSW 9-11, Seas SSW 2.3-4.1 ft @ 13sec
SATURDAY - Not available yet
SUNDAY - SW 8-10, Seas N/A ?-? ft @ ?
MONDAY - SW 9-11, Seas N/A ?-? ft @ ?