The High Seas Forecast for the South Pacific

High Seas Forecast Issued: 11/21/2025 01:13:35 AM UTC
                        
652
FZPS40 PHFO 201513
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC THU NOV 20 2025

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT
OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE MORE THAN
TWICE THE SIGNIFICANT WAVE HEIGHT.

THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE
HIGHER THAN 10-MINUTE AVERAGE WINDS.

SECURITE

SOUTH PACIFIC EQUATOR TO 25S BETWEEN 120W AND 160E

SYNOPSIS VALID 1200 UTC NOV 20 2025.
24 HOUR FORECAST VALID 1200 UTC NOV 21 2025.
48 HOUR FORECAST VALID 1200 UTC NOV 22 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 25S123W 19S128W 15S137W 14S155W 13S161W MOVING SE SLOWLY
S OF 20S AND NEARLY STATIONARY ELSEWHERE. SCATTERED MODERATE TSTMS
WITHIN 240 NM OF TROUGH W OF 152W. ISOLATED MODERATE TSTMS WITHIN
300 NM OF TROUGH ELSEWHERE.
.24 HOUR TROUGH STRENGTHENED TO FRONT 25S120W 21S125W THENCE
TROUGH 16S137W 16S163W.
.48 HOUR FORECAST FRONT MOVED S OF AREA. TROUGH 25S121W 15S135W
17S154W.

.TROUGH 16S177W 13S167W 08S162W MOVING W SLOWLY. SCATTERED
MODERATE TSTMS WITHIN 150 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 25S175W 10S172W.
.48 HOUR FORECAST TROUGH 25S173E 15S176W.

.TROUGH 25S179E 19S179E NEARLY STATIONARY. ISOLATED MODERATE
TSTMS WITHIN 270 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED ABOVE.

.TROUGH 17S169E 09S160E MOVING NEARLY STATIONARY. ISOLATED
MODERATE TSTMS WITHIN 270 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 15S171E 08S160E.
.48 HOUR FORECAST TROUGH 18S170E 10S160E.

.WINDS 20 TO 30 KT S OF 15S BETWEEN 178W AND 150W.
.24 HOUR FORECAST WINDS 20 TO 25 KT S OF 17S BETWEEN 179E AND
147W.
.48 HOUR FORECAST WINDS 20 TO 30 KT S OF 19S BETWEEN 175E AND
150W.

.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 2.5 TO 4 M S OF LINE 25S177E 15S176W 14S158W 24S135W
22S126W 25S120W.
.24 HOUR FORECAST SEAS 2.5 TO 4 M S OF LINE 25S169E 15S178W
13S169W 18S145W 24S134W 24S120W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M S OF LINE 25S167E 17S177W
18S160W 16S172W 17S146W 25S154W.

.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.

.SCATTERED MODERATE TSTMS FROM 07S TO 04S BETWEEN 170E AND 175W.


$$

.FORECASTER PIERCE. HONOLULU HI.