Threes Surf Break

Lat Long: 13.26° N 144.66° E

GUAM

Threes Surf Forecast and Surf Report

Issued: 9 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Threes sea temperature is
29.7°C
0.4° 

Threes surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Threes surf forecast from 4 Sep 2026:

  • Best quality surf: Saturday 5 Sep, 7PM (local time) - 4.5ft (1.4m), 9s period, W swell with glassy winds.
  • Most powerful swell: Friday 4 Sep, 1PM (local time) - 7ft (2.1m), 9s period, W swell with 718 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 7PM (local time) - 4.5ft (1.4m), 9s period with W swell.

Best Forecast Surf Conditions for Threes this week:

The surf forecast for Threes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 05) at 7PM. The primary swell is predicted to be 1.4m and 9s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Threes in the next 16 days are 2.1m 9s and forecast to arrive on Friday (Sep 04) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 14s period and expected on Friday (Sep 11) at 4PM.

Wave TypeTime (ChST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Sat 5th Sep)4.5ft (1.4m) 9s
Best Surf 7PM (Sat 5th Sep)4.5ft (1.4m) 9s
Most Powerful 1PM (Fri 4th Sep)7ft (2.1m) 9s

Table - best surf conditions forecast for Threes over the next 16 days.


Short Range Forecast

Moderate rain (total 15mm), heaviest on Sun morning. Warm (max 29°C on Fri morning, min 26°C on Sun afternoon). Wind will be generally light.

Days 4-6 Weather Summary

Some drizzle, heaviest during Mon night. Warm (max 29°C on Wed afternoon, min 27°C on Mon afternoon). Wind will be generally light.

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
1
0
0
0
0
0
0
0
2
2
0
1
0
0
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.3
W
9
2
W
9
1.8
W
9
1.6
W
9
1.5
W
9
1.3
W
8
1.4
WNW
10
1.4
WNW
10
1.4
WNW
10
1.3
WNW
10
1.2
WNW
9
1.2
WNW
10
1.2
WNW
10
1.1
WNW
10
1
WNW
9
1
WNW
10
1
WNW
10
0.9
WNW
9
0.8
WNW
9
0.7
WNW
8
0.6
WNW
8
Wave Graph
Metric surfscale
Energy kJ
885
651
521
430
364
239
386
363
348
283
213
296
258
210
158
186
179
127
84
72
51
Wind (km/h)
25
SW
25
WSW
15
WSW
10
W
10
W
10
WNW
15
NW
20
NW
15
N
20
NNE
15
NNE
15
NNE
15
NE
10
NE
10
NNE
0
NW
5
NW
5
NNE
5
WSW
10
NW
10
NNW
Wind State
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross
cross
cross
cross-off
cross-off
cross
glassy
cross-on
cross
glassy
on
cross-on
High Tide
2:21PM0.60m
11:45PM0.69m
4:09PM0.63m
00:50AM0.67m
5:23PM0.67m
2:18AM0.66m
6:12PM0.71m
3:50AM0.67m
6:50PM0.73m
5:07AM0.69m
7:22PM0.74m
6:12AM0.71m
7:51PM0.74m
Low Tide
6:25PM0.52m
7:52AM-0.02m
8:05PM0.56m
9:10AM-0.04m
9:58PM0.56m
10:22AM-0.07m
11:14PM0.51m
11:23AM-0.09m
00:08AM0.45m
12:16PM-0.08m
00:52AM0.37m
1:02PM-0.05m
1:33AM0.29m
clear
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
part cloud
part cloud
part cloud
thunderstorm
clear
clear
clear
clear
clear
clear
clear
thunderstorm
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
6:30
6:29
6:28
6:28
6:27
6:25
 mm
5
4
1
5
1
1
Temp °C
29
29
28
28
29
28
28
27
27
28
28
27
28
28
27
28
29
28
28
28
28
Feels °C
29
30
30
31
33
32
31
28
29
30
30
29
31
31
31
33
33
32
33
31
32
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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Information about the Threes Surf forecast

The above surf forecast table for Threes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Threes can be found by selecting the local surf guide option on the grey menu. Our Threes surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Threes) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Threes may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Threes is 25 km (16 miles) from Agana. If you plan a holiday in Guam, look for hotels and other accommodation in Agana. Agana has rooms for a wide range of budgets as well as car hire and transport links.

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