
Surf Forecasts:
Right and Left Side surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 7AM (local time) - 5ft (1.6m), 10s period, WNW swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 1AM (local time) - 7ft (2.2m), 11s period, WNW swell with 1,194 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 1AM (local time) - 5ft (1.6m), 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 Tuesday (Aug 18) at 1AM. The primary swell is predicted to be 1.6m and 9s 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 2.2m 11s and forecast to arrive on Thursday (Aug 13) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 9s period and expected on Tuesday (Aug 18) at 7PM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Tue 18th Aug) | 5ft (1.6m) 9s |
| Best Surf | 7AM (Tue 18th Aug) | 5ft (1.6m) 10s |
| Most Powerful | 1AM (Thu 13th Aug) | 7ft (2.2m) 11s |
Table - best surf conditions forecast for Right and Left Side over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the cards for the next couple of weeks. We're only looking at one spot here, so it's a pretty focused outlook.
Right off the bat, it's a quiet start with no real surf to speak of. The first real chance for anything decent won't come until the 18th of August, so there's a solid week of waiting ahead.
The one break we've got on the radar is Right and Left Side (reef). This is an advanced, inconsistent spot, so it's not one for the faint-hearted or beginners. It's exposed to swell, but it only works when things line up, and it's a rare break that can be a bit finicky.
The water temperature feels about average for this time of year, nothing out of the ordinary.
Okay, let's jump into the specifics. The first notable window is the morning of Tuesday the 18th of August. The swell will be a modest 5ft from the WNW, with a period of 10 seconds. The wind is a light NE cross-off, making for clean conditions. The wave energy is moderate (475). The swell direction is not quite ideal for the optimum N direction, but it's close enough, and the clean conditions make it the standout of the whole forecast. It's the only time we get a "good surf conditions" call, and that's a big deal. The afternoon on the same day is a write-off with a cross-on wind and smaller swell.
After that, things drop right off. From the 19th of August onwards, the swell gets tiny and the period is short, mostly under 3ft and with periods of 8 seconds or less. The wind is often cross-on or cross-off, but the waves are just too small to be worth paddling out for. The combined energy drops to two-digit values (like 109, 105, 84), showing it's weak.
There is a brief mention of glassy conditions with a long period swell on the 24th and 26th of August, but the swell is only 1ft to 2ft with a period of 10-13 seconds. That's nice for a flat spell, but it's still just tiny waves. The energy is very low (33, 85, 72). For a reef break, that's not going to be doing much.
So, the bottom line is: wait for the morning of the 18th of August. That's your best shot. The rest of the period is a pretty flat run for this spot, which is a bit of a bummer, but that's how it goes sometimes.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue night. Warm (max 29°C on Wed morning, min 27°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 41mm), heaviest during Sun night. Warm (max 29°C on Sat morning, min 28°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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 9 | W 10 | W 10 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | W 9 | WNW 11 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 |
Wave Graph | |||||||||||||||||||
408 | 661 | 680 | 1194 | 1080 | 1163 | 787 | 553 | 763 | 440 | 440 | 495 | 430 | 395 | 493 | 509 | 445 | 495 | 440 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross-on | cross | cross-on | glassy |
High Tide | 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 | 10:51AM0.79m | 10:52PM0.89m | |||||||
Low Tide | 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 | 4:54AM0.36m | 4:38PM0.43m | |||||||
— | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — | — | 6:42 | — | |
mm | 2 | — | — | — | — | — | 1 | — | — | — | 1 | — | 3 | 4 | 2 | 30 | 1 | — | — |
Temp °C | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 30 | 30 | 32 | 32 | 31 | 31 | 31 | 30 | 31 | 33 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | NW 12 | SE 10 | SE 10 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | W 9 | SE 10 | W 9 | W 9 | SE 10 | W 9 | W 9 | SE 10 | W 9 | W 9 | W 9 | W 9 |
140 | 36 | 35 | 1194 | 1080 | 1163 | 787 | 553 | 54 | 440 | 440 | 26 | 430 | 395 | 15 | 509 | 445 | 495 | 440 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | NNE 10 | NNE 10 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | N 12 | SE 10 | SE 10 | NE 11 | SE 10 | SE 10 | ENE 9 | SE 10 | SE 10 | SE 9 | SE 9 |
38 | 33 | 18 | 37 | 51 | 52 | 56 | 55 | 25 | 38 | 27 | 18 | 25 | 25 | 16 | 15 | 15 | 14 | 14 | |
Swell 3 Height (m) Direction Period (s) | NNE 10 | E 10 | E 10 | NNE 9 | ENE 11 | ENE 11 | ENE 11 | N 11 | NE 11 | N 11 | N 10 | N 10 | NE 10 | ENE 9 | S 7 | ENE 8 | E 8 | E 8 | E 8 |
18 | 7 | 7 | 8 | 11 | 11 | 12 | 9 | 5 | 36 | 17 | 7 | 4 | 16 | 1 | 14 | 13 | 12 | 12 | |
Wind waves Height (m) Direction Period (s) | W 9 | W 10 | W 10 | — | — | — | — | — | WNW 11 | — | — | W 9 | W 9 | — | W 9 | — | — | — | — |
408 | 661 | 680 | — | — | — | — | — | 763 | — | — | 495 | 288 | — | 493 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1835 | 1835 | 2064 | 1836 | 1835 | 230 | 16 | 16 | 16 | 16 | 230 | 16 | 2064 | 230 | 230 | 232 | 232 | 232 | 0 |
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.











