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Weather in Mangilao - 14-day forecast

Detailed weather forecast for Mangilao, Guam: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Mangilao
today🌧️ 29°💧 5.2 mm
Sun🌧️ 28°💧 7.1 mm
Mon☁️ 28°💧 0.6 mm
Tue☁️ 29°💧 0.3 mm
Wed🌧️ 29°💧 0.5 mm
Thu🌧️ 29°💧 6 mm
Fri🌧️ 29°💧 3.5 mm
Sat🌧️ 28°💧 6.9 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

Monday 7 Sept in Mangilao, the forecast high is 28°C. Typical daytime temperatures at this time of year range from 28°C to 29°C, so it will be cooler than usual. It is cooler than 86% of similar days.

29°Cwarmer than usual
usually 28°C–29°C
warmer than 75% of similar days
night: exceptionally cool rain: typical rainfall wind: typical
28°Cnear normal
usually 28°C–29°C
night: exceptionally cool rain: typical rainfall wind: typical
28°Ccooler than usual
usually 28°C–29°C
cooler than 86% of similar days
night: exceptionally cool rain: exceptionally dry wind: typical
29°Cnear normal
usually 28°C–29°C
night: exceptionally cool rain: exceptionally dry wind: typical
29°Cnear normal
usually 28°C–29°C
night: exceptionally cool rain: exceptionally dry wind: typical
29°Cnear normal
usually 28°C–29°C
night: exceptionally cool rain: typical rainfall wind: typical
29°Cnear normal
usually 28°C–29°C
night: exceptionally cool rain: less rain than usual 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 →
25°30°35° 1981: 29°C1982: 28°C1983: 29°C1984: 28°C1985: 28°C1986: 28°C1987: 29°C1988: 29°C1989: 28°C1990: 28°C1991: 28°C1992: 28°C1993: 28°C1994: 29°C1995: 29°C1996: 28°C1997: 28°C1998: 29°C1999: 28°C2000: 28°C2001: 28°C2002: 29°C2003: 29°C2004: 28°C2005: 28°C2006: 29°C2007: 28°C2008: 29°C2009: 29°C2010: 29°C2011: 29°C2012: 29°C2013: 29°C2014: 29°C2015: 29°C2016: 29°C2017: 29°C2018: 29°C2019: 29°C2020: 29°C2021: 29°C2022: 30°C2023: 29°C2024: 30°C2025: 29°C 2026 forecast: 29°C current forecast 29°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 29°C by day. The coolest year was 2004 (28°C) and the warmest was 2024 (30°C). The current forecast averages 29°C - close to the historical median.

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 - Mangilao

Mangilao - 14-day weather forecast infographic

Day-by-day forecast for Mangilao

Saturday5 September 2026
🌧️29°moderate rain
sunrise 06:10 · sunset 18:30 · night 25° · evening 26° · rain 5.24 mm · humidity 77% · wind 4 m/s · clouds 70%
Sunday6 September 2026
🌧️28°moderate rain
sunrise 06:10 · sunset 18:29 · night 26° · evening 26° · rain 7.12 mm · humidity 76% · wind 5 m/s · clouds 100%
Monday7 September 2026
☁️28°overcast clouds
sunrise 06:10 · sunset 18:28 · night 27° · evening 27° · rain 0.56 mm · humidity 72% · wind 5 m/s · clouds 88%
Tuesday8 September 2026
☁️29°broken clouds
sunrise 06:10 · sunset 18:28 · night 27° · evening 27° · rain 0.31 mm · humidity 74% · wind 5 m/s · clouds 77%
Wednesday9 September 2026
🌧️29°light rain
sunrise 06:10 · sunset 18:27 · night 27° · evening 27° · rain 0.54 mm · humidity 75% · wind 5 m/s · clouds 91%
Thursday10 September 2026
🌧️29°light rain
sunrise 06:10 · sunset 18:26 · night 27° · evening 27° · rain 6 mm · humidity 78% · wind 5 m/s · clouds 77%
Friday11 September 2026
🌧️29°light rain
sunrise 06:10 · sunset 18:25 · night 26° · evening 27° · rain 3.48 mm · humidity 74% · wind 4 m/s · clouds 82%
Saturday12 September 2026
🌧️28°light rain
sunrise 06:10 · sunset 18:25 · night 27° · evening 27° · rain 6.93 mm · humidity 72% · wind 4 m/s · clouds 83%
Sunday13 September 2026
🌧️29°light rain
sunrise 06:10 · sunset 18:24 · night 27° · evening 28° · rain 2.1 mm · humidity 76% · wind 5 m/s · clouds 72%
Monday14 September 2026
🌧️29°light rain
sunrise 06:10 · sunset 18:23 · night 27° · evening 27° · rain 1.41 mm · humidity 77% · wind 6 m/s · clouds 100%
Tuesday15 September 2026
🌧️29°light rain
sunrise 06:10 · sunset 18:23 · night 27° · evening 27° · rain 0.21 mm · humidity 74% · wind 4 m/s · clouds 8%
Wednesday16 September 2026
🌧️29°light rain
sunrise 06:10 · sunset 18:22 · night 27° · evening 28° · rain 1.23 mm · humidity 70% · wind 2 m/s · clouds 23%
Thursday17 September 2026
🌧️29°light rain
sunrise 06:10 · sunset 18:21 · night 27° · evening 28° · rain 0.57 mm · humidity 71% · wind 2 m/s · clouds 71%
Friday18 September 2026
☀️29°clear sky
sunrise 06:10 · sunset 18:20 · night 26° · evening 27° · rain 5.97 mm · humidity 68% · wind 3 m/s · clouds 2%
Saturday19 September 2026
☀️28°clear sky
sunrise 06:10 · sunset 18:20 · night 27° · evening 27° · rain 2.19 mm · humidity 73% · wind 4 m/s · clouds 9%
Sunday20 September 2026
☀️29°clear sky
sunrise 06:10 · sunset 18:19 · night 27° · evening 27° · humidity 75% · wind 5 m/s · clouds 1%

UV index in Mangilao - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTMangilao03681111+9.3UV VERY HIGHtoday, daily maxSPF 50, long sleeves and shade between 10:00 and16:00.Unprotected fair skin may burn in about 20 min9Sat5.098Sun6.098Mon7.099Tue8.099Wed9.095Thu10.099Fri11.099Sat12.099Sun13.099Mon14.099Tue15.099Wed16.099Thu17.099Fri18.098Sat19.099Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Mangilao is 9 (very high) - unprotected fair skin can burn in about 20 minutes. SPF 50, long sleeves and shade between 10:00 and 16:00.

Sea temperature - Mangilao

Water today
29°C
Week avg
30°C
Waves today
1 m
How's the water?
very warm
16-day sea temperature forecast:
5.09 29°C6.09 30°C7.09 30°C8.09 30°C9.09 30°C10.09 30°C11.09 30°C12.09 30°C13.09 30°C
Average sea temperature through the year:
Jan 29°CFeb 28°CMar 28°CApr 29°CMay 29°CJun 30°CJul 30°CAug 30°CSep 30°COct 30°CNov 30°CDec 29°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Nearby and related places

TamuningDededoYigoSaipanWewakMount HagenGoroka

FAQ - Mangilao weather

What is the weather like in Mangilao today?
Today it is about 29° during the day and 25° at night, moderate rain.
How far ahead can I check the forecast for Mangilao?
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.