Right and Left Side Surf Break

Lat Long: 13.48° N 144.75° E

GUAM

Right and Left Side Surf Forecast and Surf Report

Issued: 3 am 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Right and Left Side sea temperature is
29.7°C
0.4° 

Right and Left Side surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Right and Left Side surf forecast from 1 Sep 2026:

  • Best quality surf: Tuesday 1 Sep, 10PM (local time) - 4.5ft (1.4m), 9s period, W swell with glassy winds.
  • Most powerful swell: Tuesday 8 Sep, 4AM (local time) - 11ft (3.5m), 11s period, W swell with 2,631 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 10PM (local time) - 4.5ft (1.4m), 9s period with W swell.

Best Forecast Surf Conditions for Right and Left Side this week:

The surf forecast for Right and Left Side over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 01) at 10PM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.5m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Right and Left Side in the next 16 days are 3.5m 11s and forecast to arrive on Tuesday (Sep 08) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 8s period and expected on Friday (Sep 04) at 10AM.

Wave TypeTime (ChST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Tue 1st Sep)4.5ft (1.4m) 9s
Best Surf10PM (Tue 1st Sep)4.5ft (1.4m) 9s
Most Powerful 4AM (Tue 8th Sep)11ft (3.5m) 11s

Table - best surf conditions forecast for Right and Left Side over the next 16 days.


The Lowdown

Alright, let’s get into it. This is a classic "wait for it" setup. Right and Left Side is a reef break that’s advanced-level and inconsistent, which means it doesn’t fire often, but when it does, it’s got real potential. The water temperature is sitting at 86°F, which is pretty much normal for this time of year – nothing out of the ordinary.

The first few days are a write-off. Tuesday morning (1st September) has a risk of thunderstorms and only 4ft of swell with a weak energy reading (320), and the wind is onshore. The afternoon is even worse. Wednesday morning (2nd September) looks slightly better with 4ft swell from the west and a 9-second period, but the real story is that sweet glassy wind – that’s a light breeze from the west, 6 mph, dead smooth. It’s a small window of clean conditions, but the surf is marginal.

From Thursday (3rd September) right through to Monday (7th September), it’s a rough stretch. We’re talking cross-shore winds building to 18-22 mph, storms, and lumpy, choppy surf. The swell size climbs from 3ft to 7ft, but the quality is poor. The energy levels start to pick up – by Saturday (5th September) we’re at 784 (moderate) – but that cross-chop is a mess. Not worth paddling out.

Then things get interesting. Monday afternoon (7th September) shows 8ft of west-northwest swell with an 11-second period and a strong energy reading of 1435. Tuesday (8th September) pushes that to 10ft, with energy levels over 2000. That’s serious power. But the wind is still a fresh cross-shore from the southwest at 19 mph, creating lumpy conditions. This is heavy, unruly stuff – only for the most experienced. A word of caution: with that long period (11 seconds) and large swell, a beach break might close out, but on a reef like this, it could offer some deep, heavy barrels for those who can handle it.

Thursday (10th September) brings a shift. The wind turns cross-offshore from the south-southwest at 19 mph, and the wave state cleans up. You’ve got 8ft of swell from the west with a 12-second period, energy levels at 1879 in the morning and 2123 in the afternoon. That’s a standout session. The wind is still fresh, but it’s clean, and the power is immense. This is the best on offer in the whole 16-day window – a real shot at some serious, well-shaped waves if you’re up for it.

Friday (11th September) drops back a bit, with 8ft to 7ft swell and moderate cross-shore winds, still decent energy but not as clean. Then Saturday morning (12th September) is a real treat – glassy conditions, 6ft swell from the west, 10-second period, and a moderate energy reading of 856. The wind is a light breeze from the south-southwest, 6 mph, dead calm. That’s a beautiful morning session. The afternoon picks up a cross-on breeze, so morning is the call.

Sunday (13th September) sees a return to 10ft swell, but with a light cross-on wind from the north. The energy is pumping (1837), but the wind direction isn’t as clean. Monday (14th September) is similar – 8ft swell, but the wind is picking up to 12 mph from the north-northeast, making it choppy. By Tuesday (15th September) and Wednesday (16th September), the swell drops off significantly, and the last few days offer only 4ft to 4ft with clean cross-off winds, but the energy is weak (around 542-574). A small, clean fade-out.

So, the standout is Thursday (10th September) – morning and afternoon – with that clean cross-off wind and powerful, long-period swell. If you can only pick one session, that’s it. Saturday morning (12th September) is a close second for the glassy conditions and more manageable size.

Rusty.

Short Range Forecast

Heavy rain (total 26mm), heaviest during Thu afternoon. Warm (max 29°C on Tue morning, min 26°C on Thu morning). Winds increasing (calm on Tue night, fresh winds from the SW by Thu afternoon).

Days 4-6 Weather Summary

Heavy rain (total 66mm), heaviest during Sun night. Warm (max 28°C on Fri morning, min 27°C on Sat night). Mainly fresh winds.

Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
2
2
1
1
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
W
9
1.2
WNW
9
1.4
W
9
1.3
W
9
1.2
W
9
1.3
W
8
1
WNW
10
1.2
WNW
11
1
WNW
11
1.1
WNW
10
1.3
WNW
9
0.4
NW
11
2.2
W
9
2.3
W
9
2.1
W
9
2.1
W
8
2.1
W
8
2.2
W
9
2.2
W
10
2.5
WNW
11
3
WNW
11
Wave Graph
Metric surfscale
Energy kJ
264
259
306
264
225
234
197
328
238
235
280
31
770
859
640
610
601
775
961
1421
2150
Wind (km/h)
10
NNW
10
NW
5
SW
5
W
10
NNW
10
SW
25
SW
30
SW
25
SW
35
SW
35
WSW
30
WSW
30
WSW
30
WSW
30
WSW
25
WSW
25
WSW
25
SW
30
SW
30
SW
25
SW
Wind State
on
on
glassy
glassy
on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
High Tide
10:27AM0.81m
10:06PM0.89m
11:32AM0.79m
10:34PM0.89m
12:49PM0.76m
11:08PM0.88m
2:25PM0.75m
11:51PM0.87m
4:09PM0.77m
00:49AM0.85m
5:24PM0.81m
2:06AM0.84m
6:12PM0.84m
3:32AM0.84m
Low Tide
4:10PM0.46m
5:00AM0.25m
4:48PM0.54m
5:51AM0.21m
5:32PM0.62m
6:50AM0.18m
6:28PM0.68m
7:58AM0.15m
7:54PM0.72m
9:09AM0.13m
9:37PM0.73m
10:17AM0.12m
10:58PM0.70m
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
mod rain
thunderstorm
cloud
thunderstorm
thunderstorm
<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>
6:31
6:31
6:30
6:30
6:30
6:29
6:28
 mm
1
4
1
4
4
6
6
4
2
5
4
4
5
10
9
23
1
10
Temp °C
29
28
28
29
29
28
27
27
28
28
28
28
28
28
28
28
28
28
29
28
28
Feels °C
32
31
33
33
33
33
28
27
28
27
27
28
28
28
29
29
29
30
30
28
28
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Right and Left Side Surf forecast

The above surf forecast table for Right and Left Side provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Right and Left Side can be found by selecting the local surf guide option on the grey menu. Our Right and Left Side 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 (Right and Left Side) 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 Right and Left Side 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.

Right and Left Side is 1 km (1 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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