Surf Forecasts:
Right and Left Side surf forecast from 12 Sep 2026:
- Best quality surf: Sunday 13 Sep, 10PM (local time) - 3ft (0.9m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 1AM (local time) - 4.5ft (1.3m), 12s period, ENE swell with 456 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 10PM (local time) - 3ft (0.9m), 12s period with ENE 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 Sunday (Sep 13) at 10PM. The primary swell is predicted to be 0.9m and 12s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Right and Left Side in the next 16 days are 1.3m 12s and forecast to arrive on Friday (Sep 18) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Friday (Sep 18) at 7AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 13th Sep) | 3ft (0.9m) 12s |
| Best Surf | 10PM (Sun 13th Sep) | 3ft (0.9m) 12s |
| Most Powerful | 1AM (Fri 18th Sep) | 4.5ft (1.3m) 12s |
Table - best surf conditions forecast for Right and Left Side over the next 16 days.
The Lowdown
G’day, Rusty here.
Well, to be straight up with you, this forecast for Right and Left Side is a pretty bleak one. We’ve got a tiny window of OK surf right at the start, and then it’s a long, ugly run of poor conditions that stretches for over two weeks. The water temp is sitting at 86°F, which is bang on average for this time of year, so no surprises there.
The only real chance to get wet comes on the morning of Tuesday, September 15. We’ve got a clean 4ft swell rolling in from the ENE with a long 13-second period, which means proper groundswell with good energy (427). The kicker is the wind – glassy, dead calm. This is your window. It’s a reef break, and it’s inconsistent, so you might have to wait for the sets, but when they come, they’ll be shaped nicely. Expect it to be a bit of a session for the advanced crew, being a reef setup. Just know it can get a little busy as crowds are sometimes an issue here.
Tuesday afternoon the wind swings and it starts to fall apart, and honestly, that’s it. From Wednesday the 16th right through to Monday the 28th of September, it’s a write-off. We’re looking at poor surf conditions day after day. The wind is constantly cross-onshore, fresh and often strong – hitting 18 to 22 mph at times – turning the ocean into a lumpy, choppy mess. Even when the swell picks up to 5ft on Thursday the 24th, the wind is so bad (19 mph cross-onshore) that it’s only going to be ugly. With the setup being a reef, all that choppy, onshore energy (863) isn’t going to do you any favours. Honestly, for those later days in September, this looks more like a kitesurfer’s playground than a paddle surfer’s.
So, mark your calendar for Tuesday morning the 15th. That’s your one shot. After that, put the board away for a while.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Tue night. Warm (max 29°C on Sun morning, min 27°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Wed afternoon. Warm (max 29°C on Wed afternoon, min 28°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 11 | ENE 9 | ENE 13 | ENE 13 | ENE 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | NE 11 | NE 11 | NE 11 | NNE 11 | N 11 | N 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 215 | 198 | 294 | 285 | 238 | 176 | 427 | 181 | 236 | 204 | 151 | 351 | 294 | 184 | 456 | 308 | 273 | 273 | 273 | 319 | 287 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | glassy | cross | cross-on | cross-on | glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:59PM0.90m | 9:53AM0.85m | 9:23PM0.88m | 10:48AM0.81m | 9:47PM0.86m | 11:47AM0.78m | 10:11PM0.83m | 12:54PM0.75m | 10:37PM0.81m | 2:16PM0.73m | 11:08PM0.78m | 3:51PM0.73m | 11:50PM0.76m | ||||||||
Low Tide | 2:59PM0.39m | 3:31AM0.28m | 3:35PM0.47m | 4:10AM0.24m | 4:10PM0.54m | 4:50AM0.22m | 4:44PM0.60m | 5:34AM0.23m | 5:21PM0.64m | 6:23AM0.24m | 6:07PM0.67m | 7:21AM0.25m | 7:20PM0.70m | ||||||||
 |  |  | |  |  |  | |  | | | | | | | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:20 | — |
mm | — | 2 | — | — | — | — | 1 | 6 | 10 | — | 1 | 1 | 1 | 1 | 4 | 1 | 2 | 3 | 2 | — | 5 |
Temp °C | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 |
Feels °C | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 30 | 32 | 31 | 31 | 31 | 31 | 30 | 30 | 32 | 32 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 11 | ENE 9 | ENE 13 | NE 9 | NE 8 | NE 8 | NE 8 | ENE 13 | ENE 12 | ENE 9 | ENE 12 | NE 11 | NE 11 | NE 11 | NNE 11 | N 11 | N 11 |
| kJ | 215 | 198 | 294 | 285 | 238 | 176 | 427 | 110 | 102 | 105 | 105 | 351 | 294 | 99 | 456 | 308 | 273 | 273 | 273 | 319 | 287 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | ENE 14 | ENE 13 | SW 8 | SW 8 | SW 8 | ENE 12 | SW 8 | SW 8 | SSE 7 | SSE 7 | WSW 8 | SW 8 | SW 8 |
| kJ | 35 | 34 | 45 | 58 | 58 | 73 | 71 | 89 | 236 | 204 | 82 | 69 | 51 | 184 | 84 | 128 | 9 | 15 | 101 | 84 | 82 |
Swell 3 Height (m) Direction Period (s) | NNE 8 | NNE 8 | WSW 6 | ENE 16 | WSW 7 | ENE 14 | SSW 9 | ENE 13 | SSE 8 | SW 9 | ENE 13 | S 7 | SSW 7 | SW 8 | SSE 7 | SSE 7 | SSE 9 | SE 9 | ENE 10 | NE 10 | NE 10 |
| kJ | 22 | 24 | 4 | 24 | 5 | 76 | 15 | 181 | 47 | 73 | 151 | 38 | 15 | 61 | 18 | 9 | 9 | 13 | 67 | 84 | 77 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 8 | WSW 8 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 116 | 101 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1835 | 2064 | 0 | 1835 | 11 | 11 | 0 | 11 | 11 | 16 | 11 | 11 | 11 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 11 |
Best forecast wave conditions in Guam | |||||||||||||||||||||
Best forecast wave conditions in Guam | |||||||||||||||||||||
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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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