The High Seas Forecast for the South Pacific

High Seas Forecast Issued: 08/18/2025 12:57:08 PM UTC
                        
879
FZPS40 PHFO 180257
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC MON AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 18 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 19 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 20 2025.

.WARNINGS.


.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 25S167W 20S172W 14S178E MOVING SE 10 KT.
.24 HOUR FORECAST FRONT 25S165W 16S180W.
.48 HOUR FORECAST FRONT WEAKENED TO TROUGH 25S164W 15S178W.

.FRONT 25S131W 16S146W 14S153W 13S161W NEARLY STATIONARY.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH 25S133W 13S152W 11S166W.
.48 HOUR FORECAST TROUGH 25S134W 15S148W 10S160W.

.FRONT 25S139W 23S142W MOVING SE SLOWLY.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH 25S139W 22S144W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 15S143W 11S147W 07S152W MOVING NW SLOWLY.
.24 HOUR FORECAST DISSIPATED.

.TROUGH 14S167E 10S160E MOVING W 10 KT.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

.24 HOUR FORECAST NEW TROUGH 11S149W 04S161W.
.48 HOUR FORECAST TROUGH 11S150W 04S155W.

.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 21S TO 10S W OF 175W.

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

.SEAS 2.5 TO 3.5 M BETWEEN LINES 25S176W 00S166W AND 25S123W
16S130W 15S150W 00S150W. SEAS 2.5 TO 3 M E OF LINE 23S120W
10S133W 02S133W 02S120W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M S OF LINE 25S158W 14S170W 04S167W
00S157W 15S148W 15S137W 07S136W 04S120W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M S OF LINE 25S153W 13S171E 06S170E
04S167W 18S141W 03S129W 02S120W.

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

.ISOLATED MODERATE TSTMS WITHIN 120NM OF 03S168E.

$$

.FORECASTER M BALLARD. HONOLULU HI.