World Resorts Northern Mariana Islands Guam Weather

Guam 14 Days Forecast

21.07
tue
Day
86°F
N 12 mph
Precip.
16%
Night
81°F
NE 7 mph
Precip.
16%
22.07
wed
Day
84°F
NE 9 mph
Precip.
8%
Night
81°F
S 3 mph
Precip.
60%
23.07
thu
Day
84°F
S 4 mph
Precip.
24%
Night
81°F
S 5 mph
Precip.
10%
24.07
fri
Day
84°F
S 7 mph
Precip.
6%
Night
81°F
SW 6 mph
Precip.
10%
25.07
sat
Day
84°F
SW 4 mph
Precip.
6%
Night
81°F
W 5 mph
Precip.
9%
26.07
sun
Day
84°F
W 7 mph
Precip.
17%
Night
81°F
W 6 mph
Precip.
11%
27.07
mon
Day
84°F
W 8 mph
Precip.
11%
Night
81°F
SW 6 mph
Precip.
12%
28.07
tue
Day
84°F
SW 6 mph
Precip.
5%
Night
81°F
SE 5 mph
Precip.
26%
29.07
wed
Day
84°F
E 9 mph
Precip.
39%
Night
81°F
E 10 mph
Precip.
46%
30.07
thu
Day
84°F
NE 14 mph
Precip.
17%
Night
81°F
N 8 mph
Precip.
15%
31.07
fri
Day
86°F
NE 12 mph
Precip.
6%
Night
81°F
N 5 mph
Precip.
8%
01.08
sat
Day
84°F
E 4 mph
Precip.
4%
Night
81°F
SE 6 mph
Precip.
7%
02.08
sun
Day
84°F
SE 10 mph
Precip.
9%
Night
82°F
SE 11 mph
Precip.
39%
03.08
mon
Day
84°F
SE 6 mph
Precip.
36%
Night
82°F
SE 5 mph
Precip.
10%

Sea water temperature in July, °F

Show year:
2026
2025
2024

The average sea water temperature in July of 2026 was 84.3°F. The highest and lowest sea temperatures during the month were 85.6°F and 83.1°F.

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 85.0°F. The highest and lowest sea temperatures during the month were 85.8°F and 84.0°F.

Air temperature in Guam, °F

Precipitation total in Guam, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Guam

Sunniest months:
July 5 days
August 5 days
September 5 days
Warmest months:
July 87.3 °F
June 87.3 °F
August 87.0 °F
Warmest sea temp:
August 85.5 °F
September 85.4 °F
July 85.3 °F
Coldest months:
February 83.1 °F
January 83.8 °F
March 84.0 °F
Rainiest months:
October 15 days
August 14 days
September 14 days
Windiest months:
February 17.3 mph
December 17.2 mph
January 16.5 mph

Guam on a weather map

Current weather
11:21
Guam
+86°F
N 12 mph
Feels like: +95°F
Precip.: 16%
Places in Northern Mariana Islands:
Name
°F
Guam
+86°F
Rota
+82°F
Saipan
+82°F
Susupe
+82°F
Tinian
+82°F
24 Hours Forecast
Guam
Local time: 11:21
July 21, tuesday
1200
86°F
N
12 mph
1500
86°F
N
12 mph
1800
84°F
NE
12 mph
2100
82°F
NE
9 mph
July 22, wednesday
0000
81°F
NE
7 mph
0300
81°F
NE
6 mph
0600
81°F
NE
3 mph
0900
82°F
NE
5 mph
Units of measurement: °C / °F