Mesepa, American Samoa experiences average highs of 27°C (81°F) and lows of 25°C (77°F) throughout the year. Rainfall is frequent, averaging about 22 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. High humidity combined with warm temperatures produces a tropical feel year-round. Average highs have stayed broadly stable across the available records.
Mesepa, American Samoa Weather & Climate 2026
Monthly climate averages for Mesepa, American Samoa. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: May–Nov 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.9/10
Best: June, July, August, September, October
UV Index
8
High
Temperature 27°C / 25°C
Feels Like 31°C / 28°C
Rainy Days 22
Rainfall 218 mm
Sunshine 10 h
Humidity 82%
Wind Speed 27 km/h
Dew Point 23°C
Hottest Month
28°C
March
Avg Low26°C
Rain24days
Coldest Month
25°C
August
Avg High26°C
Rain16days
Driest Month
16days
August
Avg High26°C
Avg Low25°C
Windiest Month
31 km/h
July (Gusts 42)
Sea Temperature
28°C – 30°C
Warmest water: March (
29.9°C
)
Worst Time to Visit
Consider avoiding January, February, November, December due to heavy rainfall, oppressive humidity.
Sun Position
Sunrise 06:46
Daylight 11.3h
Sunset 18:03
Live conditions—
Mesepa on the map · live conditions
Mesepa, American Samoa
- Continent
- Oceania
- Country
- American Samoa
- City
- Mesepa
- Population
- 552
- Elevation
- 47 m
- Coordinates
- -14.32°, -170.75°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 27°C
Avg Low 25°C
Rain 21 days/mo
2/3 best months
Summer
Dec–Feb
Avg High 27°C
Avg Low 26°C
Rain 26 days/mo
Autumn
Mar–May
Avg High 28°C
Avg Low 26°C
Rain 24 days/mo
Winter
Jun–Aug
Avg High 27°C
Avg Low 25°C
Rain 18 days/mo
3/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 28°C / 26°C . Feb: 27°C / 26°C . Mar: 28°C / 26°C . Apr: 28°C / 26°C . May: 27°C / 26°C . Jun: 27°C / 26°C . Jul: 26°C / 25°C . Aug: 26°C / 25°C . Sep: 26°C / 25°C . Oct: 27°C / 25°C . Nov: 27°C / 25°C . Dec: 27°C / 25°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 297 mm. Feb: 426 mm. Mar: 179 mm. Apr: 227 mm. May: 224 mm. Jun: 155 mm. Jul: 138 mm. Aug: 101 mm. Sep: 113 mm. Oct: 198 mm. Nov: 234 mm. Dec: 320 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 82%. Feb: 83%. Mar: 82%. Apr: 82%. May: 82%. Jun: 81%. Jul: 81%. Aug: 80%. Sep: 81%. Oct: 82%. Nov: 82%. Dec: 83%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 25 km/h . Feb: 28 km/h . Mar: 21 km/h . Apr: 24 km/h . May: 27 km/h . Jun: 30 km/h . Jul: 31 km/h . Aug: 30 km/h . Sep: 30 km/h . Oct: 30 km/h . Nov: 25 km/h . Dec: 25 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 9h. Mar: 10h. Apr: 10h. May: 10h. Jun: 10h. Jul: 10h. Aug: 10h. Sep: 11h. Oct: 11h. Nov: 11h. Dec: 10h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 30°C . Feb: 30°C . Mar: 30°C . Apr: 30°C . May: 29°C . Jun: 29°C . Jul: 28°C . Aug: 28°C . Sep: 28°C . Oct: 28°C . Nov: 29°C . Dec: 29°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 9. Feb: UV 8. Mar: UV 9. Apr: UV 8. May: UV 7. Jun: UV 6. Jul: UV 6. Aug: UV 7. Sep: UV 8. Oct: UV 9. Nov: UV 9. Dec: UV 9.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 69 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | — | Mar · 28°C |
| Coldest month | — | Aug · 25°C |
| Wettest month | Feb 2025 · 458 mm | Feb · 426 mm |
| Windiest month | Oct 2025 · 33 km/h | Jul · 31 km/h |
Month-by-Month Weather Table
January
Wet 
February
Wet March
Wet April
Wet May
Wet June best
Wet July best
Wet August best
Good September best
Wet October best
Wet November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 28°C / 26°C | 32°C / 29°C | 26days (297 mm) Wet | 9.9h Good | 82% Humid | 8.8 Very High | Wet | View Details |
| February | 27°C / 26°C | 32°C / 28°C | 24days (426 mm) Wet | 8.6h Good | 83% Humid | 8.3 Very High | Wet | View Details |
| March | 28°C / 26°C | 33°C / 29°C | 24days (179 mm) Wet | 10.4h Excellent | 82% Humid | 8.9 Very High | Wet | View Details |
| April | 28°C / 26°C | 32°C / 29°C | 24days (227 mm) Wet | 9.6h Good | 82% Humid | 7.9 Very High | Wet | View Details |
| May | 27°C / 26°C | 31°C / 28°C | 23days (224 mm) Wet | 9.6h Good | 82% Humid | 6.5 High | Wet | View Details |
| June best | 27°C / 26°C | 29°C / 27°C | 19days (155 mm) Wet | 9.9h Good | 81% Humid | 6.2 High | Wet | View Details |
| July best | 26°C / 25°C | 29°C / 26°C | 20days (138 mm) Wet | 9.9h Good | 81% Humid | 6.3 High | Wet | View Details |
| August best | 26°C / 25°C | 29°C / 26°C | 16days (101 mm) Wet | 10.4h Excellent | 80% Humid | 7.2 Very High | Good | View Details |
| September best | 26°C / 25°C | 29°C / 26°C | 18days (113 mm) Wet | 10.8h Excellent | 81% Humid | 8.4 Very High | Wet | View Details |
| October best | 27°C / 25°C | 30°C / 27°C | 22days (198 mm) Wet | 10.7h Excellent | 82% Humid | 8.8 Very High | Wet | View Details |
| November | 27°C / 25°C | 31°C / 28°C | 23days (234 mm) Wet | 10.7h Excellent | 82% Humid | 8.9 Very High | Wet | View Details |
| December | 27°C / 25°C | 32°C / 28°C | 27days (320 mm) Wet | 10.3h Excellent | 83% Humid | 9 Very High | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Mesepa are June, July, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Mesepa, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Mesepa is March, with average daytime highs of 28°C (82°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Mesepa is August, with average overnight lows of 25°C (77°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Mesepa is February, averaging 426mm of precipitation across 24 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Mesepa runs through December, January, February, March, with the heaviest rainfall in December. Based on 10-year averages for Mesepa.
Mesepa receives approximately 121 sunshine hours per year. The sunniest month is September with around 11 hours. Based on climate data for Mesepa.
The least favorable months to visit Mesepa are January, February, November, December, primarily due to heavy rainfall, oppressive humidity. For the best conditions, consider June, July, August, September, October instead.
The annual average UV index in Mesepa is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Mesepa is 82%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes — sea temperatures in January, February, March, April, May, June, July, August, September, October, November, December average 29°C (84°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Mesepa are 27 km/h (17 mph). The windiest month is July with peak winds reaching 31 km/h (19 mph) (gusts up to 42 km/h / 26 mph).
Mesepa averages 2 clear-sky days per month with overall cloud cover around 61%. The clearest skies occur in September.
The annual average dew point in Mesepa is 23°C (73°F), which feels muggy and uncomfortable. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Mesepa has a Tropical Rainforest climate, classified as Af under the Köppen system. Tropical climates are warm year-round with high rainfall and temperatures rarely dropping below 18°C (64°F).
The 'feels like' temperature in Mesepa ranges from 28°C (82°F) to 31°C (88°F) on average. Humidity and radiant heat mean it often feels warmer than the thermometer reads, especially in summer months.
June is not the best time to visit Mesepa, with a climate score of 7/10. Consider visiting during June, July, August, September, October instead for better conditions.
For June in Mesepa, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 27°C (80°F) and 19 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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