744
FXZS60 NSTU 160058
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
158 PM SST Sun Mar 15 2026

.Short term...

Drier air at the low to mid levels of the atmosphere has led to a
mostly sunny day over American Samoa. This led to temperatures
above average throughout the islands. WSO Pago Pago recorded 90
degrees and the ASPA/UH weather station at Aunu`u also recorded
90 degrees.

Overall, rainfall is projected to be below average through the
middle of the week. Easterly flow is forecast to generate winds up
to 15 mph, but decreasing to around 10 by early to mid-week. If
showers occur through Tuesday, it will be in the passing form. A
mid-level high may steer moisture from a disorganized trough from
the south over the territory by Tuesday night and Wednesday. The
chance of rainfall increases from isolated to scattered showers
(20 to 30% chance from tonight through Monday night) to scattered
showers (40 to 50% chance) on Tuesday and Wednesday. If showers
develop, flash flooding is not expected. Temperatures forecast on
Monday are, once again, above average.

.Long term...

There are no major weather systems projected to move over the
territory for late next week and into the new weekend. Easterly
flow remains over the territory to maintain below average
rainfall and winds around 10 mph.

There is no risk of tropical development along the American Samoa
islands for the next 7 days.

&&

.Marine...

A long period southerly swell began moving through the American
Samoa coastal waters overnight last night. This led to seas
building to 8 to 9 feet, which was recorded by both PacIOOS buoys
to the east of Aunu`u and to the west of Tutuila. As southerly
swell continues to weaken for the rest of the day today and
tonight, the High Surf Advisory for the southern shores will
likely be canceled by late tonight and the Small Craft Advisory by
early Monday morning. Seas are anticipated to ease to around 4 to
6 feet for Monday and Tuesday with benign conditions expected with
a gentle easterly breeze and no significant swell.

By late Tuesday and Wednesday, another round of southerly swell is
anticipated to move through the coastal waters. Seas are not
expected to be choppy, but surf is anticipated to build
throughout this time to at least near High Surf Advisory levels
mainly for the southern coasts of Tutuila, Aunu`u and the Manu`a
islands. Seas ease on Wednesday night and benign conditions are
anticipated for the rest of the week.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...

A High Surf Advisory remains in effect through Sunday night.
A Small Craft Advisory remains in effect.

&&

$$

LaPlante