Surf Forecasts:
Right and Left Side surf forecast from 10 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 10PM (local time) - 8ft (2.5m), 11s period, WNW swell with 1,597 kJ wave energy.
Best Forecast Surf Conditions for Right and Left Side this week:
The most powerful waves expected at Right and Left Side in the next 16 days are 2.5m 11s and forecast to arrive on Wednesday (Aug 12) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 9s period and expected on Tuesday (Aug 11) at 7AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Wed 12th Aug) | 8ft (2.5m) 11s |
Table - best surf conditions forecast for Right and Left Side over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down the next couple of weeks. It’s a tough outlook, no two ways about it.
We’ve only got one spot on the map: Right and Left Side. It’s a reef break that’s inconsistent and really needs a north swell to wake up. The water’s a warm 85°F, which is pretty average for this time of year.
For the first week and a half, from Monday the 10th through Wednesday the 19th, it’s a bust. The swell is decent, with combined energy peaking at 1197 (moderate to strong), but the wind is a constant cross-onshore from the west and southwest, blowing up to 19 mph. The ocean is a lumpy, choppy mess. Even the biggest day, Wednesday the 12th with 8ft of west swell at 10 seconds, looks like a washing machine. Not worth the paddle.
Things finally clean up on Thursday the 20th. The wind turns light offshore from the southeast at 6 mph, giving us clean conditions. The catch? The swell is tiny, only 3ft from the west-northwest. The combined energy is a weak 171. It’s surfable, but barely.
After that, it’s a flat spell. From Friday the 21st, the swell drops to under 3ft, with combined energy falling to as low as 37 (very weak). The wind stays clean and cross-offshore, but there’s no power. The one real standout is Sunday the 23rd of August. We’re looking at a pathetic 1ft of swell, but it’s a long-period 13-second groundswell from the east-northeast, and the wind goes glassy in the afternoon. For a longboard, that might be the cleanest, most fun window of the whole forecast. The energy is still weak at 64.
So, your best bet is that clean Thursday the 20th for the most shape, or that glassy Sunday the 23rd if you just want to feel the glide. Otherwise, it’s a long stretch of nothing. Don’t give up hope, the forecasts always change.
- Rusty
Short Range ForecastModerate rain (total 17mm), heaviest on Tue night. Warm (max 29°C on Mon afternoon, min 28°C on Mon afternoon). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sun morning. Warm (max 30°C on Sat morning, min 28°C on Thu afternoon). Wind will be generally light. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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) | W 10 | WNW 12 | W 11 | W 11 | W 11 | W 8 | W 10 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 10 | W 9 | WNW 11 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 641 | 513 | 1172 | 1037 | 915 | 623 | 1137 | 1456 | 1103 | 1012 | 563 | 528 | 659 | 397 | 599 | 454 | 510 | 418 | 374 | 391 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:26PM0.87m | 4:39AM0.91m | 8:03PM0.90m | 5:47AM0.92m | 8:36PM0.91m | 6:51AM0.92m | 9:07PM0.92m | 7:51AM0.91m | 9:35PM0.92m | 8:50AM0.88m | 10:02PM0.92m | 9:49AM0.84m | 10:27PM0.91m | |||||||
Low Tide | 11:57PM0.72m | 12:29PM0.00m | 00:55AM0.68m | 1:19PM0.01m | 1:47AM0.62m | 2:05PM0.06m | 2:35AM0.56m | 2:47PM0.13m | 3:22AM0.49m | 3:27PM0.22m | 4:08AM0.42m | 4:04PM0.33m | ||||||||
 |  | | | |  |  |  | | | | | |  | | | | | | | |
 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — |
mm | 3 | 3 | 3 | 1 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 4 | 2 |
Temp °C | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 30 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 30 | 30 | 29 | 29 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 30 | 31 | 32 | 32 | 31 | 31 | 31 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | NW 11 | WNW 12 | SE 11 | SE 11 | SE 10 | NW 12 | SE 10 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 10 | W 9 | WNW 11 | WNW 10 | WNW 10 | SE 10 | SE 10 | WNW 9 |
| kJ | 298 | 513 | 19 | 30 | 38 | 66 | 35 | 1456 | 1103 | 1012 | 563 | 528 | 659 | 397 | 599 | 454 | 510 | 25 | 25 | 391 |
Swell 2 Height (m) Direction Period (s) | NE 11 | NE 10 | NE 10 | NNE 10 | NNE 10 | SE 10 | NNE 10 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 10 | N 11 | SE 10 | SE 10 | SE 10 | ENE 9 | ENE 9 | SE 10 |
| kJ | 30 | 17 | 16 | 10 | 18 | 36 | 18 | 37 | 51 | 52 | 56 | 55 | 54 | 36 | 27 | 27 | 26 | 16 | 16 | 24 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 10 | E 11 | E 10 | E 10 | NNE 10 | E 10 | ENE 9 | ENE 11 | ENE 11 | NE 11 | N 10 | N 12 | SE 10 | N 10 | N 10 | ENE 9 | N 11 | N 9 | ENE 8 |
| kJ | 21 | 15 | 9 | 8 | 8 | 20 | 7 | 8 | 11 | 11 | 5 | 8 | 44 | 38 | 31 | 17 | 17 | 10 | 7 | 14 |
Wind waves Height (m) Direction Period (s) | W 10 | W 9 | W 11 | W 11 | W 11 | W 8 | W 10 | — | — | — | — | — | — | — | — | W 3 | — | WNW 9 | WNW 9 | — |
| kJ | 641 | 473 | 1172 | 1037 | 915 | 623 | 1137 | — | — | — | — | — | — | — | — | 3 | — | 418 | 374 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1863 | 1835 | 1835 | 1904 | 1835 | 1835 | 1863 | 1835 | 16 | 1884 | 11 | 16 | 16 | 11 | 11 | 11 | 16 | 16 | 16 | 230 |
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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