
Surf Forecasts:
Right and Left Side surf forecast from 9 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 4AM (local time) - 10ft (3.0m), 12s period, WNW swell with 2,555 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 3.0m 12s and forecast to arrive on Thursday (Aug 13) 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 1.7m 8s period and expected on Sunday (Aug 16) at 10AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Thu 13th Aug) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Right and Left Side over the next 16 days.
The Lowdown
Gutted, mate. Right and Left Side is the only spot on the map for this whole 16-day window, and it’s got a lot of potential, but it’s going to be a battle against the wind for most of it. This is a reef break, and it’s exposed to the west, which is exactly where the swell is coming from. But it’s also inconsistent, so you’ll be sitting and waiting for sets that might not come with any real push.
The water's sitting at a normal 85° for this time of year, so no surprises there.
Right out of the gate, Sunday the 9th, we’ve got a 7ft west swell with a 10-second period. The energy is up there at 1210, so there’s some push in the water, but it’s getting torn up by a 16 mph WSW cross-breeze. It’s going to be lumpy and cross-chop, not the clean, grinding reef you want. It’s surfable, but you’ll be working for it.
Monday the 10th turns properly poor. The swell drops slightly to 7ft, but the wind swings more onshore at 19 mph, making things lumpy and messy. Not worth paddling out for a wave that’s going to be closing out or sectioning all over the place.
Tuesday the 11th sees the swell bump up to 8ft, with a touch more period at 11 seconds. The energy is storming at 1427. But that wind is still a fresh 22 mph cross-shore, and there’s the risk of a thunderstorm. It’s a grumpy, challenging day. The morning session is your only real shout, and even then, it’s marginal.
Wednesday the 12th stays at 8ft, with the wind dropping slightly to 19 mph out of the SW. Still cross, still lumpy. The energy is pumping at 1376-1481, so there are waves, but they’re going to be unruly and hard to ride with any flow.
Now, Thursday the 13th is the first real standout of the whole run. The swell peaks at 10ft from the WNW with an 11-second period. The combined energy is maxing out at 1964 – that’s strong, serious power. The wind drops to a moderate 16 mph WSW breeze, still cross-shore, but with that much swell, it might just clean up a bit. This is for advanced surfers only – 10ft of west swell on an exposed reef is no joke. It’s big, it’s heavy, and it’s going to be a proper session. This is the one to circle.
After that, it’s a slow grind downhill. Friday the 14th drops back to 7ft, but the wind is back up at 19 mph and it’s cross-shore, making it poor again. The weekend of the 15th and 16th is more of the same – 8ft and 7ft of swell, but with fresh cross and cross-onshore winds, it’s just going to be a washing machine.
The whole second week is a write-off. From the 17th through to the 24th, the swell drops and the wind stays onshore or cross-onshore, keeping everything blown out and messy. There’s a small window on the 18th with a 5ft swell and a lighter 9 mph breeze, but it’s still cross-onshore and choppy. Not worth the paddle.
The only other blip is Friday morning the 21st. The swell is down to a weak 4ft, but for a few hours, the wind goes glassy with a 3 mph SE breeze. It’s a low-energy, clean window, but with the combined energy at just 238, it’s flat and weak. You might get a couple of soft little ones at the peak, but that’s about it.
So, the standout is Thursday the 13th. If you’re an advanced surfer and you want some serious, powerful west swell, that’s your day. The waves will be big, the period is solid, and despite the cross-breeze, the energy is there. Everything else is a struggle against the wind.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Mon night. Warm (max 29°C on Sun morning, min 28°C on Sun afternoon). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Wed morning, min 28°C on Wed afternoon). Mainly fresh winds. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | W 10 | W 10 | W 10 | W 9 | W 9 | W 11 | W 11 | W 8 | W 9 | W 10 | W 10 | W 10 | WNW 11 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 |
Wave Graph | |||||||||||||||||||||
1007 | 902 | 867 | 700 | 650 | 1326 | 1405 | 846 | 791 | 1352 | 1458 | 1595 | 1949 | 1509 | 978 | 893 | 913 | 708 | 1141 | 1109 | 891 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on |
High Tide | 6:40PM0.83m | 3:28AM0.89m | 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 | ||||||||
Low Tide | 10:34AM0.07m | 10:45PM0.74m | 11:34AM0.03m | 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 | ||||||||
6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | |
mm | — | — | — | — | 1 | 8 | 4 | 2 | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 1 |
Temp °C | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 30 | 29 | 29 | 29 | 30 | 29 | 27 | 28 | 29 | 30 | 30 | 29 | 30 | 30 | 30 | 29 | 30 | 30 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | ENE 12 | NE 12 | NE 11 | NW 12 | NW 12 | SE 10 | SE 11 | N 7 | NW 12 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 10 | NW 12 | N 10 | SE 10 | SE 10 |
184 | 142 | 63 | 236 | 414 | 15 | 19 | 27 | 116 | 36 | 35 | 37 | 37 | 52 | 57 | 56 | 39 | 216 | 30 | 26 | 25 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 9 | SE 9 | NE 11 | NE 11 | NE 10 | ENE 11 | SE 11 | SE 10 | NNE 10 | NNE 10 | ENE 9 | ENE 11 | ENE 11 | E 11 | NNW 8 | N 10 | N 10 | SE 10 | N 10 | NE 11 |
24 | 23 | 22 | 58 | 19 | 17 | 12 | 18 | 38 | 19 | 18 | 8 | 11 | 11 | 9 | 6 | 31 | 45 | 27 | 17 | 19 | |
Swell 3 Height (m) Direction Period (s) | NW 11 | NW 11 | SE 10 | SE 9 | SE 9 | E 11 | NNE 10 | NNE 10 | NNE 9 | NE 12 | NE 12 | N 9 | W 15 | N 8 | N 8 | N 10 | E 10 | SE 10 | ENE 11 | NNE 10 | N 9 |
19 | 18 | 24 | 13 | 13 | 9 | 10 | 10 | 9 | 5 | 5 | 6 | 4 | 1 | 1 | 8 | 2 | 28 | 12 | 11 | 6 | |
Wind waves Height (m) Direction Period (s) | W 10 | W 10 | W 10 | W 9 | W 9 | W 11 | W 11 | W 8 | W 9 | W 10 | W 10 | W 10 | WNW 11 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 |
1007 | 902 | 867 | 700 | 650 | 1326 | 1405 | 846 | 791 | 1352 | 1458 | 1595 | 1949 | 1509 | 978 | 893 | 913 | 708 | 1141 | 1109 | 891 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1835 | 1863 | 1835 | 1835 | 1904 | 1835 | 1835 | 1904 | 1835 | 1835 | 1904 | 1835 | 1835 | 1835 | 1995 | 1835 | 2069 | 1289 | 1835 | 1908 | 2064 |
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.











