Weather in American Samoa - today, tomorrow and 14-day forecast

Right now temperatures across American Samoa range from 26° to 26°. Below: today's conditions city by city, a live weather map, the 14-day outlook and month-by-month climate to help you pick the best time to travel.

Country values are the median of forecasts from 1 cities; the range shows local differences. Methodology.

Next days in American Samoa

today🌧️ 26°💧 0.2 mm

Sun🌧️ 26°💧 0.3 mm

Mon🌧️ 26°💧 0.6 mm

Tue☁️ 26°💧 0.5 mm

Wed🌧️ 26°💧 0.4 mm

Thu🌧️ 26°💧 0.6 mm

Fri🌧️ 26°💧 0.6 mm

Sat☁️ 25°💧 2.7 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Sunday 6 Sept in American Samoa, the forecast high is 26°C. Typical daytime temperatures at this time of year range from 27°C to 28°C, so it will be exceptionally cool. It is cooler than 97% of similar days.

Friday 4 Sept

26°Cexceptionally cool

usually 27°C–28°C

cooler than 95% of similar days

night: cooler than usual rain: less rain than usual wind: typical

Saturday 5 Sept

26°Cexceptionally cool

usually 27°C–28°C

cooler than 94% of similar days

night: cooler than usual rain: less rain than usual wind: typical

Sunday 6 Sept

26°Cexceptionally cool

usually 27°C–28°C

cooler than 97% of similar days

night: exceptionally cool rain: typical rainfall wind: stronger than usual

Monday 7 Sept

26°Cexceptionally cool

usually 27°C–28°C

cooler than 96% of similar days

night: cooler than usual rain: typical rainfall wind: stronger than usual

Tuesday 8 Sept

26°Cexceptionally cool

usually 27°C–28°C

cooler than 92% of similar days

night: cooler than usual rain: less rain than usual wind: typical

Wednesday 9 Sept

26°Cexceptionally cool

usually 27°C–28°C

cooler than 92% of similar days

night: cooler than usual rain: typical rainfall wind: typical

Thursday 10 Sept

26°Cexceptionally cool

usually 27°C–28°C

cooler than 94% of similar days

night: cooler than usual rain: typical rainfall wind: lighter than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 4-10 Sept period averaged 27°C by day. The coolest year was 1987 (25°C) and the warmest was 2003 (28°C). The current forecast averages 26°C - lower than in 91% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - American Samoa

American Samoa - 14-day weather forecast infographic

American Samoa 30 & 45-day weather - long-range outlook

Next 16 days · forecast

26°

around 26° at night · days with rain: 6

Weeks 3-4 · avg for September

30°

around 24° at night · rain chance 22%

Weeks 5-7 · avg for October

30°

around 24° at night · rain chance 17%

The 30 & 45-day outlook for American Samoa: the next 16 days are a numerical forecast updated daily - on average 26° by day and 26° at night. Further out we rely on multi-year climate averages: around 30° in September, and about 30° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for American Samoa

Saturday5 September 2026

🌧️26°light rain

night 26° · evening 26° · rain 0.22 mm · humidity 78% · wind 8 m/s · clouds 72%

Sunday6 September 2026

🌧️26°light rain

night 26° · evening 26° · rain 0.29 mm · humidity 72% · wind 8 m/s · clouds 16%

Monday7 September 2026

🌧️26°light rain

night 25° · evening 25° · rain 0.61 mm · humidity 77% · wind 10 m/s · clouds 17%

Tuesday8 September 2026

☁️26°overcast clouds

night 26° · evening 26° · rain 0.53 mm · humidity 76% · wind 9 m/s · clouds 95%

Wednesday9 September 2026

🌧️26°light rain

night 26° · evening 26° · rain 0.38 mm · humidity 79% · wind 9 m/s · clouds 61%

Thursday10 September 2026

🌧️26°light rain

night 26° · evening 26° · rain 0.61 mm · humidity 82% · wind 8 m/s · clouds 49%

Friday11 September 2026

🌧️26°light rain

night 26° · evening 26° · rain 0.58 mm · humidity 81% · wind 6 m/s · clouds 17%

Saturday12 September 2026

☁️25°broken clouds

night 25° · evening 25° · rain 2.69 mm · humidity 74% · wind 6 m/s · clouds 76%

Sunday13 September 2026

☁️26°broken clouds

night 26° · evening 26° · rain 0.1 mm · humidity 69% · wind 6 m/s · clouds 78%

Monday14 September 2026

☁️26°overcast clouds

night 26° · evening 26° · rain 5.16 mm · humidity 72% · wind 7 m/s · clouds 89%

Tuesday15 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 3.36 mm · humidity 83% · wind 10 m/s · clouds 100%

Wednesday16 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.58 mm · humidity 79% · wind 9 m/s · clouds 93%

Thursday17 September 2026

🌧️25°light rain

night 26° · evening 25° · rain 0.38 mm · humidity 78% · wind 8 m/s · clouds 69%

Friday18 September 2026

🌧️25°light rain

night 26° · evening 25° · rain 2.07 mm · humidity 81% · wind 9 m/s · clouds 97%

Saturday19 September 2026

🌧️26°light rain

night 26° · evening 26° · rain 7.38 mm · humidity 83% · wind 10 m/s · clouds 87%

Sunday20 September 2026

🌧️25°moderate rain

night 25° · evening 24° · rain 23.16 mm · humidity 84% · wind 10 m/s · clouds 98%

Sea temperature - American Samoa

Water today

27°C

Week avg

27°C

Waves today

2.4 m

How's the water?

warm

16-day sea temperature forecast:

5.09 27°C6.09 27°C7.09 27°C8.09 27°C9.09 27°C10.09 27°C11.09 27°C12.09 27°C13.09 27°C

Average sea temperature through the year:

Jan 30°CFeb 30°CMar 30°CApr 30°CMay 30°CJun 29°CJul 28°CAug 28°CSep 28°COct 28°CNov 29°CDec 30°C

Beach	Water today	Water week avg	Waves	How's the water?
Pago Pago	27℃	27℃	2.2 m	very warm

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

American Samoa weather through the year

American Samoa weather month by month - when is the best time to go?

January (27°)February (27°)March (28°)April (28°)May (28°)June (29°)July (29°)August (30°)September (30°)October (30°)November (29°)December (28°)

Weather in other countries in Oceania

AustraliaWallis and FutunaChristmas IslandVanuatuCocosTuvalu

FAQ - American Samoa weather

What is the weather like in American Samoa today?

Today it is about 26° during the day and 26° at night, light rain.

How far ahead can I check the forecast for American Samoa?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.