American Samoa's Tropical Cyclone Outlook 2025-26

Below Normal to Near Normal Tropical Cyclone (TC) Activity anticipated for American Samoa in the 2025-26 TC Season Read More >

581
FXZS60 NSTU 150121
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
221 PM SST Sat Mar 14 2026

.Short term...

A low pressure system continues to move to the south of American
Samoa today. Most places along the territory had rain between 9
and 10 this morning, which resulted in over an inch of rain at the
WSO Pago Pago office. Otherwise, all other weather stations
recorded a half an inch or less. A mix of sun and clouds are now
over the islands this afternoon and clouds are forecast to
decrease tonight. If a showers occur, it would be in the passing
form and flash flooding is not expected. The easterly trades
increase slightly reaching up to 15 mph, but well below the Wind
Advisory levels. By tomorrow, more sun than clouds are forecast
with only isolated to scattered (20 to 30% chance) showers. Benign
weather is expected to continue until Monday. Temperatures are
forecast to be above normal on Sunday.

.Long term...

A mid-level high pressure system is to form to the south of
American Samoa on Monday night through Wednesday. During this
time, this high may drag low to mid level moisture over the
territory to increase the risk of rain in the region. Even though
flash flooding is not expected, the chance of rain increases to
scattered to numerous (50 to 60% chance) throughout this time.
Winds are to remain a light easterly wind. More clouds than sun is
forecast with temperature back to normal.

This high moves away from the territory in the middle of the week.
A light easterly tradewind breeze is anticipated with only
scattered showers, at best, for late in the week.

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

&&

.Marine...

A southerly swell began to move through the American Samoa coastal
waters this morning to elevate seas throughout the western,
eastern, and southern waters along with surf along the southern
shores. A High Surf Advisory is now in effect for southern shores
through Sunday. A Small Craft Advisory will likely remain in
effect throughout the day on Sunday and may expire as early as the
evening hours. Both seas and surf are forecast to subside below
advisory conditions by Monday morning. We will monitor another
round of southerly swell on Tuesday night and Wednesday, but may
not be strong enough to reach advisory levels. For Monday, early
Tuesday, and late next week, benign sea conditions are forecast.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...

A High Surf Advisory is in effect.
A Small Craft Advisory is in effect.

&&

$$

LaPlante