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 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Right and Left Side sea temperature is
29.2° C
0.1° 

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 18 Aug 2026:

  • Best quality surf: Friday 21 Aug, 1PM (local time) - 1.5ft (0.5m), 9s period, W swell with glassy winds.
  • Most powerful swell: Monday 24 Aug, 1PM (local time) - 6ft (1.8m), 13s period, N swell with 1,087 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 1PM (local time) - 1.5ft (0.5m), 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 Friday (Aug 21) at 1PM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.6m and 7s. 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 1.8m 13s and forecast to arrive on Monday (Aug 24) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 9s period and expected on Sunday (Aug 23) at 7PM.

Wave TypeTime (ChST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Fri 21st Aug)1.5ft (0.5m) 9s
Best Surf 1PM (Fri 21st Aug)1.5ft (0.5m) 9s
Most Powerful 1PM (Mon 24th Aug)6ft (1.8m) 13s

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


The Lowdown

Alright, surfers, Rusty here. Let’s talk about the next stretch of waves. It’s a bit of a slow burn right now, but there’s some real potential building out there if you’re willing to wait for it.

Right now, the water’s sitting at a warm 85°, which is pretty much spot-on for this time of year, so no worries there. The surf, though? It’s flat. We’re looking at a stretch of a few days where there's basically nothing on offer. The swell is tiny, under 3ft, and the winds are all over the place. Tuesday morning, the 18th, starts off with a bit of glassy, clean 4ft W swell, but it’s got a short 8-second period and the energy is weak (210). It’s just not getting it done. After that, we’ve got a few days of junk – cross-onshore breezes, chopped-up conditions, and even smaller swell. This is the kind of stretch where you’re better off doing something else. It’s just a waiting game.

The first real sign of life doesn’t show up until the following week. Things start to get moving around the 22nd and 23rd. The swell starts to pick up and the period stretches out – that’s the groundswell starting to roll in. For the 23rd, we're looking at 4ft to 5ft NNE swell with a 12-second period, but it’s being blown out by a fresh, 22 mph cross-offshore wind. The energy is building (799), but the wind is making it messy. It's still on the marginal side, and the break is pretty inconsistent, so it's not a lock.

But the standout, the day to really keep an eye on, is Monday the 24th. The swell is up to 6ft from the N with a solid 13-second period, and the energy is kicking into gear (1064). It’s still got that fresh cross-offshore wind, which is a shame because it’s spoiling what could be a classic. The morning looks a lot cleaner than the afternoon, but it’s still more of a “promising but not perfect” call. Right and Left Side is a reef break, and it's advanced-only. The inconsistency is something to respect.

After that, the swell stays in the water, but the conditions just don’t cooperate for a while. We’ve got a long stretch from the 25th to the 31st where it’s all cross-shore winds, bigger swell, and rough, lumpy conditions. The size gets up into the 10-13ft range, but with strong cross-shore winds, it’s going to be a mess. A spot like this, a reef, with that much swell and wind, is going to be a washing machine. Honestly, for a few of those days, it looks more interesting for someone on a kite than a paddle surfer.

The real payoff window looks like it could be around the 1st and 2nd of September. We’re seeing the swell ease back to a manageable 8ft, the period stretching out to 14 seconds, and crucially, the wind swings offshore. The energy is strong (2684), and the conditions are looking clean. This is the sort of setup that could offer some decent waves. It’s still a week and a half away, so don’t book the time off yet, but it’s the most promising thing I see on the charts right now. That second week is looking like the one to target for something a bit more special, but keep your expectations in check for now.

Stay patient. Rusty out.

Short Range Forecast

Some drizzle, heaviest during Wed night. Warm (max 30°C on Thu morning, min 27°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 13mm), heaviest on Sun morning. Warm (max 30°C on Sat morning, min 28°C on Fri night). Winds increasing (calm on Fri morning, fresh winds from the SW by Sun morning).

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
2
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)
1.2
W
8
1.1
W
8
1
W
8
1
W
8
1
W
8
0.9
W
8
0.6
WNW
8
0.5
WNW
8
0.6
NNE
7
0.6
NNE
7
0.6
E
14
0.8
E
11
1.1
E
11
1.4
ENE
12
1.4
NE
12
1.3
NNE
12
1.5
NNE
12
1.5
N
12
1.8
N
13
1.7
NNW
13
1.5
NNW
12
Wave Graph
Metric surfscale
Energy kJ
190
160
136
144
143
112
55
40
36
29
146
149
307
589
609
496
666
670
1037
980
656
Wind (km/h)
5
N
10
N
15
NNW
20
NNW
20
N
15
NE
10
NNE
15
N
5
NE
0
SE
10
W
10
WSW
20
WSW
20
WSW
20
SW
35
SSW
35
SW
30
SW
30
SSW
30
SW
20
SW
Wind State
glassy
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross
glassy
cross-on
cross
cross
cross-on
cross
cross-off
cross-off
cross
cross-off
cross
cross
High Tide
11:57AM0.74m
11:17PM0.87m
1:14PM0.71m
11:43PM0.84m
2:50PM0.69m
00:13AM0.82m
4:40PM0.70m
00:52AM0.79m
5:59PM0.73m
1:47AM0.78m
6:41PM0.76m
2:57AM0.78m
7:12PM0.79m
Low Tide
5:12PM0.52m
6:29AM0.29m
5:46PM0.59m
7:21AM0.28m
6:24PM0.65m
8:19AM0.26m
7:23PM0.69m
9:20AM0.25m
9:03PM0.71m
10:19AM0.22m
10:36PM0.71m
11:11AM0.20m
11:37PM0.69m
clear
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thunderstorm
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clear
part cloud
thunderstorm
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thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:07
6:07
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:39
6:39
6:38
6:38
6:37
6:37
 mm
1
1
2
2
3
3
2
5
1
17
Temp °C
29
29
28
29
29
28
30
29
28
29
29
28
30
29
28
29
29
28
28
29
29
Feels °C
33
32
31
30
30
31
34
32
33
35
33
32
32
31
31
29
29
29
29
30
31
  • 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 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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