Surf Forecasts:
Right and Left Side surf forecast from 20 Aug 2026:
- Best quality surf: Monday 24 Aug, 10PM (local time) - 3.5ft (1.1m), 12s period, NNW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 4AM (local time) - 10ft (3.0m), 10s period, W swell with 2,080 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 4AM (local time) - 2.5ft (0.8m), 6s period with NE 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 4AM. The primary swell is predicted to be 0.8m and 6s period. 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 3.0m 10s and forecast to arrive on Friday (Aug 28) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Wednesday (Aug 26) at 4AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 21st Aug) | 2.5ft (0.8m) 6s |
| Best Surf | 10PM (Mon 24th Aug) | 3.5ft (1.1m) 12s |
| Most Powerful | 4AM (Fri 28th Aug) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Right and Left Side over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s break down what’s happening at Right and Left Side. It’s a lean stretch for most, but there’s some heavy water coming if you’ve got the chops.
First off, this reef is inconsistent and for advanced crew only. From Friday morning August 21st right through Sunday morning August 23rd, forget it. Tiny swell, messy wind, wave energy in the dumps (42 to 338). Nothing to ride.
Sunday afternoon the 23rd shows a glimmer – 5ft swell from the north, clean with a cross-off breeze, energy reading 536. Still marginal, tide-dependent. Not a highlight.
Then the whole week from Monday the 24th to Thursday the 27th stays poor. Wind’s too strong – 15 to 25 mph – and the swell stays small or chopped up. Even when it bumps to 5ft on Thursday afternoon, the wind’s roaring at 25 mph and the waves are messy. Energy’s there (506), but it’s not surfable.
Now, pay attention. Friday morning August 28th, a 10ft west swell arrives with a clean cross-off breeze. Energy jumps to 2094 (strong). That’s big – over 8ft, so experts only. The wind turns cross-shore by afternoon, but the size holds. Saturday the 29th stays 10ft from the west, moderate cross-shore wind, energy over 2075. If you’re advanced and can handle heavy west swell on a reef – even though the optimum direction here is north – these clean mornings are your best bet. Crowds are possible.
From Sunday the 30th into early September, the swell stays big – 8ft to 10ft – but the wind goes cross-on or onshore, making it rough and poor. Energy stays strong (1364 to 2370), but quality drops. Not worth the hassle unless you’re looking for a fight.
Wednesday September 2nd looks sweet. Morning brings 10ft west swell, clean with a cross-off breeze, and energy at 2496. This might be the top window – solid size, clean, and strong energy. Thursday the 3rd is smaller at 7ft to 8ft with moderate cross-shore wind. Then it fades to smaller, wind-blown surf by Saturday the 5th.
So, bottom line: a dry start, then two standout windows for experts only – Friday August 28th morning and Wednesday September 2nd morning. That’s where the magic lives. The rest is a grind.
Rusty out.
Short Range ForecastHeavy rain (total 34mm), heaviest during Sun afternoon. Warm (max 29°C on Fri morning, min 27°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the S by Sun afternoon). | Days 5-7 Weather SummaryHeavy rain (total 200mm), heaviest during Mon night. Warm (max 28°C on Sun night, min 25°C on Mon night). Winds increasing (light winds from the SSW on Mon night, strong winds from the SSW by Wed morning). | ||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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) | NE 6 | NE 6 | E 10 | E 9 | NE 10 | NE 10 | NNE 10 | N 11 | N 11 | N 11 | N 11 | NNW 11 | NNW 11 | NNW 11 | NNW 12 | NW 11 | NW 12 | NW 12 | NW 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 51 | 42 | 125 | 99 | 316 | 231 | 210 | 286 | 502 | 295 | 251 | 268 | 247 | 160 | 169 | 189 | 140 | 142 | 60 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross | cross-off | cross | cross | cross | cross-off | cross | cross-off |
High Tide | 00:13AM0.82m | 4:40PM0.70m | 00:52AM0.79m | 5:59PM0.73m | 1:47AM0.78m | 6:41PM0.76m | 2:57AM0.78m | 7:12PM0.79m | 4:06AM0.79m | 7:38PM0.81m | 5:07AM0.81m | 8:01PM0.83m | |||||||
Low Tide | 8:19AM0.26m | 7:23PM0.69m | 9:20AM0.25m | 9:03PM0.71m | 10:19AM0.22m | 10:36PM0.71m | 11:11AM0.20m | 11:37PM0.69m | 11:57AM0.17m | 00:23AM0.66m | 12:37PM0.16m | 1:03AM0.62m | |||||||
 |  |  | |  |  |  | | |  | | | | | | | | | | |
 | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | — | 6:38 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — |
mm | — | — | 1 | — | — | 6 | 9 | 5 | 13 | 2 | 2 | 5 | 94 | 11 | 5 | 27 | 41 | 13 | 26 |
Temp °C | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 28 | 28 | 28 | 28 | 26 | 26 | 27 | 27 | 26 | 26 | 27 |
Feels °C | 32 | 34 | 33 | 32 | 30 | 31 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 26 | 28 | 27 | 24 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NE 6 | E 10 | E 9 | S 9 | S 9 | NNE 10 | N 11 | N 11 | N 11 | N 11 | NNW 11 | NNW 11 | NNW 11 | NNW 12 | NW 11 | NW 12 | NW 12 | NW 11 |
| kJ | 51 | 42 | 125 | 99 | 363 | 390 | 210 | 286 | 502 | 295 | 251 | 268 | 247 | 160 | 169 | 189 | 140 | 142 | 60 |
Swell 2 Height (m) Direction Period (s) | WSW 9 | ESE 13 | NNE 6 | SSE 9 | NE 10 | NE 10 | WNW 8 | SE 9 | ENE 12 | ENE 12 | ENE 12 | SSE 8 | ENE 14 | ENE 13 | S 8 | ENE 13 | ENE 12 | ENE 12 | ENE 12 |
| kJ | 58 | 131 | 35 | 96 | 316 | 231 | 13 | 101 | 29 | 48 | 46 | 75 | 63 | 101 | 55 | 93 | 83 | 56 | 53 |
Swell 3 Height (m) Direction Period (s) | W 8 | WSW 8 | WSW 8 | NNE 6 | WNW 8 | WNW 9 | E 13 | N 15 | WNW 7 | WNW 7 | ENE 16 | SE 9 | WNW 11 | WNW 10 | ENE 13 | SE 9 | SE 9 | SE 9 | SE 10 |
| kJ | 34 | 38 | 37 | 27 | 22 | 26 | 14 | 39 | 5 | 5 | 26 | 42 | 23 | 19 | 98 | 21 | 21 | 12 | 15 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SW 8 | WSW 7 | S 9 | SSW 8 | S 8 | S 8 | SSW 9 | SW 9 | SW 8 | SW 8 | WSW 8 | SW 8 | WSW 9 | WSW 9 | WSW 8 |
| kJ | — | — | — | — | 14 | 10 | 593 | 504 | 708 | 617 | 682 | 437 | 613 | 653 | 424 | 435 | 1488 | 1409 | 1252 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 1 | 11 | 11 | 2425 | 2069 | 230 | 1835 | 2068 | 1835 | 1835 | 230 | 230 | 1835 | 1958 | 1835 | 1835 | 1908 | 1835 |
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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