Agana Heights, Guam Weather Conditions

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Current Conditions

  • 84°
  • Mostly Cloudy
  • Wind: SSE 6 mph
  • Humidity: 76%
  • Visibility: 10.0 miles
  • Dew Point: 76°
  • Pressure: 29.78 in. -
  • Heat Index: 93

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Next 12 Hours

2  pm
5  pm
8  pm
11  pm
2  am
Mostly Cloudy
Mostly Cloudy
Chance of a Thunderstorm
Chance of T-storms
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Thunderstorm
  • High: 86 °
  • Low: 76 °
  • T-Storms
  • Saturday
  • Thunderstorm
  • High: 84 °
  • Low: 77 °
  • T-Storms
  • Sunday
  • Chance of a Thunderstorm
  • High: 86 °
  • Low: 76 °
  • Chance of T-Storms
  • Monday
  • Thunderstorm
  • High: 85 °
  • Low: 76 °
  • T-Storms
  • Tuesday
  • Thunderstorm
  • High: 85 °
  • Low: 77 °
  • T-Storms

Forecast for Agana Heights, Guam

Updated: 3:49 am CHST on September 4, 2015

  • Today

    Partly sunny with isolated showers and thunderstorms. Variable winds 5 to 10 mph on Guam and Rota. East winds around 10 mph on Tinian and Saipan. Highs around 87.

  • Tonight

    Mostly cloudy with isolated showers and thunderstorms. Southwest winds 5 to 10 mph Guam and Rota. Light and variable winds Tinian and Saipan. Lows around 77.

  • Saturday through Sunday

    Mostly cloudy with isolated showers and thunderstorms. Light and variable winds. Highs around 87. Lows around 77.

  • Sunday Night through Tuesday Night

    Mostly cloudy with isolated showers and thunderstorms. Lows in the upper 70s. Highs in the upper 80s.

  • Wednesday through Thursday

    Partly cloudy with isolated showers. Highs in the upper 80s. Lows in the upper 70s.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Maite, Maite, GU

Updated: 1:46 PM ChST

Temperature: 78.3 °F Dew Point: 76 °F Humidity: 94% Wind: West at 1.0 mph Pressure: 29.78 in Hourly Precipitation: 0.23 in Heat Index: 81 °F Graphs

Location: Jose Leon Guerrero Street, Asan

Updated: 1:45 PM ChST

Temperature: 80.8 °F Dew Point: 77 °F Humidity: 88% Wind: North at - Pressure: 29.26 in Hourly Precipitation: 0.15 in Heat Index: 87 °F Graphs

Location: Ordot Dump, Chalan Pago Ordot

Updated: 1:46 PM ChST

Temperature: 77.0 °F Dew Point: 74 °F Humidity: 91% Wind: Calm Pressure: 29.76 in Hourly Precipitation: 0.17 in Heat Index: 78 °F Graphs

Location: Perezville, Tamuning, Guam

Updated: 1:45 PM ChST

Temperature: 77.4 °F Dew Point: 74 °F Humidity: 91% Wind: WSW at 6.0 mph Pressure: 29.65 in Hourly Precipitation: 0.28 in Heat Index: 79 °F Graphs

Location: Mangilao, Mangilao, GU

Updated: 1:46 PM ChST

Temperature: 81.3 °F Dew Point: 75 °F Humidity: 82% Wind: SW at 5.0 mph Pressure: 29.75 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Santa Rita, Guam

Updated: 1:46 PM ChST

Temperature: 76.5 °F Dew Point: 73 °F Humidity: 89% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Jeffs Pirates Cove, Guam, Ipan Talofofo, GU

Updated: 1:46 PM ChST

Temperature: 82.3 °F Dew Point: 79 °F Humidity: 89% Wind: WNW at 2.0 mph Pressure: 29.69 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Ypaopao Estates, Dededo

Updated: 1:38 PM ChST

Temperature: 85.5 °F Dew Point: 69 °F Humidity: 58% Wind: Calm Pressure: 29.33 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Paradise Estates, Dededo, Guam, Guam

Updated: 1:46 PM ChST

Temperature: 82.9 °F Dew Point: 76 °F Humidity: 80% Wind: SSW at 5.1 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion

Area forecast discussion 
National Weather Service tiyan GU 
621 am chst Friday Sep 4 2015 

latest ascat analysis reveals a circulation centered just 
southeast of Guam. VAD wind profile indicates this system is 
undergoing strong wind shear above 25k feet. Radar scan shows an mesoscale convective system 
associated with the circulation approaching the Guam and Rota 
marine zones from the east. Otherwise...the monsoon trough between 
130e and 160e looks relatively quiet. 


short term forecast is made with low confidence. Radar trends 
suggest both Guam and Rota could experience scattered...even 
numerous shower coverage later this morning...but poor 
organization of the tropical disturbance currently passing through 
suggests the convection will shear apart before it arrives over 
the forecast zones. Models all agree on this dry bias forecast 
scenario. If not...forecast will need to be updated by middle morning 
to increase shower coverage...especially for the Guam and Rota 
zones. After today...monsoon trough lifts slowly northward. 
Convergent west winds should provide continued low-level forcing 
for showers and thunderstorms through at least the first half of 
next week. Have added mention of thunder for Monday and Tuesday of 
next week. Beyond Tuesday...environment still looks favorable for 
thunder. Model guidance suggests monsoonal environment could 
generate scattered showers over the forecast zones at times next 
week...but it is too early to pinpoint exactly when and where 
these events might occur. 


buoy readings indicate combined seas in the 3 to 5-foot range. 
Have adjusted secondary swell today and tonight per buoy spectrum 
plots to come from the northeast and have added a foot to the 
secondary today and tonight. Otherwise...have left swell grids 
unchanged. Model guidance still supports increasing northeast 
swell from TY kilo and increasing monsoon waves and swell early 
next week. 


Eastern micronesia... 
the monsoon trough remains stretched to the north of eastern 
micronesia and dips southeastward toward a weak disturbance 
centered near 8n180. Clouds and showers have diminished near 
Pohnpei and Kosrae but showers and thunderstorms are found nearer 
Majuro. Shower coverage will increase to scattered on Majuro 
later this afternoon but will decrease back to isolated Saturday. 
The proximity of the trough will maintain isolated thunderstorms 
in the area through Saturday night. Dry weather for Pohnpei and 
Kosrae will end over the weekend as the monsoon trough dips 
southward. Pohnpei will see wetter conditions Sunday...while most 
of the showers stay just north of Kosrae. 

Wave models continue to indicate increasing north swell over the 
weekend and early next week as TY kilo drifts by Wake Island. The 
largest impact will be in the far northern atolls of the 
Marshalls this weekend and early next week. Northern atoll 
shadowing should reduce the size of the swell reaching Majuro. 
Pohnpei and Chuuk will see long period north swell building early 
next week. Models show similar trends for Kosrae...but overall 
swell is expected to be slightly smaller. 


Western micronesia... 
a narrow band of showers and thunderstorms is seen over Yap. The 
monsoon trough lies just to the north of Yap and Chuuk. Most 
convection is centered near a weak circulation centered near the 
marianas which will slide to the west-northwest. Koror and Chuuk 
will see quieter weather in the short term while Yap sees an 
increase in showers tonight. The monsoon trough will become more 
active over the weekend and early next week. This will bring 
isolated thunderstorms to Chuuk by Monday. However...most activity 
will remain just north of Koror...nearer to Yap. Combined seas are 
still expected to increase near Chuuk next week...see eastern 
micronesia discussion for more details on timing. 


Gum watches/warnings/advisories... 
Marianas waters...none. 


McElroy/W. Aydlett 

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