Surf Forecasts:
Right and Left Side surf forecast from 31 Aug 2026:
- Best quality surf: Sunday 6 Sep, 1PM (local time) - 6ft (1.9m), 8s period, W swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 10AM (local time) - 7ft (2.2m), 9s period, W swell with 786 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 10PM (local time) - 3.5ft (1.1m), 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 Monday (Aug 31) at 10PM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.4m and 11s. 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 9s and forecast to arrive on Monday (Sep 07) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 8s period and expected on Friday (Sep 04) at 1AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Mon 31st Aug) | 3.5ft (1.1m) 9s |
| Best Surf | 1PM (Sun 6th Sep) | 6ft (1.9m) 8s |
| Most Powerful | 10AM (Mon 7th Sep) | 7ft (2.2m) 9s |
Table - best surf conditions forecast for Right and Left Side over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s coming up for Right and Left Side (Right-and-Left-Side).
This is a tricky forecast, folks. The first few days are a bit of a write-off, with small, weak swell and wind that’s just not cooperating. We’ve got a long gap of poor conditions kicking off the outlook. The window opens up mid-week with a bit of size, but it’s not until the following week that things get interesting.
Monday the 31st and Tuesday the 1st are a bust. We’re talking tiny waves with cross-onshore winds, making for crunchy, uninviting surf. The combined energy is weak, hovering around 97 to 375 (moderate at best), and the conditions just aren’t worth suiting up for.
Wednesday morning the 2nd is our first real glimmer of hope. The swell builds to 5 ft from the west, and the wind goes cross-offshore out of the NE. It’s clean, and the combined energy climbs to 441 (moderate). The period is a short 9 seconds, so it won’t be the most powerful, but it’s the best of the early run. The afternoon turns to junk again, so get out early.
Then we hit a rough patch. From Thursday the 3rd all the way through Monday the 7th, we’ve got strong winds from the SW and WSW, whipping up a messy cross-chop. The swell hangs around 3 ft to 7 ft but it’s all blown out, with combined energy jumping between 206 and 482. This is kite-surfing territory, not paddle surfing. Best to leave the boards in the car.
Now, Tuesday the 8th of September. This is where things get serious. The swell jumps to 8 ft from the west, with a period of 10 seconds. The combined energy is pumping at 1134 (strong!), and the offshore wind from the SSW keeps it clean. This is a big, powerful wave. At over 8 ft, this is expert territory only. It’s inconsistent though, so be patient between sets.
Wednesday the 9th holds similar size, with 10 ft from the west and a longer 11-second period, combined energy at 2070 (very strong). Again, clean in the morning with cross-offshore wind. This is the standout window for experienced surfers.
But the real highlight, the one to circle on the calendar, is Thursday morning the 10th of September. The swell is 8 ft from the west, with a 10-second period and combined energy of 1224 (strong). The wind is light and cross-offshore from the south, giving us glassy, clean conditions. The report says “excellent surf conditions for experienced surfers.” This is the moment. The water temp is about average for this time of year, nothing wild.
After that, it gets ugly again. A big storm system moves in from the 11th onward, with gale-force winds and huge, messy swell up to 15 ft. Combined energy hits a massive 4957 on the 13th, but it’s all cross-shore and blown out. Even the clean windows on the 14th and 15th are for experts only, with 10 ft to 13 ft swell and long periods (13-14 seconds) that will be breaking straight at this reef setup. Not a beginner's game.
So, bottom line: if you can handle some size and are comfortable on a reef, the best bet is early on Wednesday the 2nd for a clean little wave, but the real gold is Thursday morning the 10th. That’s the one. For the rest, sit it out.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Wed night. Warm (max 29°C on Mon morning, min 27°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 71mm), heaviest during Sat night. Warm (max 28°C on Thu night, min 26°C on Thu morning). Winds decreasing (fresh winds from the SW on Thu afternoon, light winds from the WSW by Sat night). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | WNW 9 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | W 9 | NE 9 | W 9 | WNW 9 | WNW 9 | NE 9 | WNW 9 | NW 11 | NW 11 | W 9 | WNW 10 | W 8 | W 8 | W 8 | W 9 | W 9 |
Wave Graph | |||||||||||||||||||||
70 | 135 | 143 | 211 | 259 | 356 | 43 | 158 | 121 | 119 | 40 | 106 | 121 | 55 | 586 | 37 | 364 | 350 | 428 | 640 | 641 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross-off | cross-off |
High Tide | 9:42PM0.89m | 10:27AM0.81m | 10:06PM0.89m | 11:32AM0.79m | 10:34PM0.89m | 12:49PM0.76m | 11:08PM0.88m | 2:25PM0.75m | 11:51PM0.87m | 4:09PM0.77m | 00:49AM0.85m | 5:24PM0.81m | 2:06AM0.84m | ||||||||
Low Tide | 3:33PM0.38m | 4:15AM0.31m | 4:10PM0.46m | 5:00AM0.25m | 4:48PM0.54m | 5:51AM0.21m | 5:32PM0.62m | 6:50AM0.18m | 6:28PM0.68m | 7:58AM0.15m | 7:54PM0.72m | 9:09AM0.13m | 9:37PM0.73m | ||||||||
6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 6:32 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | |
mm | — | — | — | — | — | — | — | 4 | 9 | 7 | 9 | 12 | 4 | 2 | 3 | 10 | 3 | 21 | 11 | 7 | 5 |
Temp °C | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 |
Feels °C | 32 | 33 | 32 | 32 | 33 | 32 | 32 | 31 | 31 | 26 | 25 | 28 | 27 | 28 | 30 | 30 | 30 | 31 | 31 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | W 9 | WSW 9 | SW 8 | SW 8 | WSW 8 | S 7 | WSW 8 | S 8 | S 7 | S 7 | SE 10 | S 6 | SE 10 | SE 10 | SE 10 | SE 9 |
55 | 135 | 143 | 211 | 259 | 356 | 413 | 187 | 327 | 154 | 44 | 268 | 138 | 62 | 58 | 48 | 22 | 47 | 47 | 46 | 31 | |
Swell 2 Height (m) Direction Period (s) | WNW 9 | WSW 8 | WSW 7 | SW 7 | SW 6 | NE 10 | NE 9 | W 9 | WNW 9 | WNW 9 | NE 9 | S 7 | NW 11 | NW 11 | SE 8 | WNW 10 | SE 10 | WNW 11 | E 9 | E 9 | N 10 |
70 | 39 | 43 | 43 | 35 | 47 | 43 | 158 | 121 | 119 | 40 | 156 | 121 | 55 | 17 | 37 | 61 | 25 | 6 | 6 | 8 | |
Swell 3 Height (m) Direction Period (s) | NE 10 | NE 10 | ENE 10 | NE 11 | NE 10 | E 10 | E 10 | NE 9 | NE 10 | SW 11 | SE 8 | WNW 9 | WNW 9 | SE 8 | ESE 11 | NNE 9 | NNE 8 | NNE 8 | NNE 9 | NE 12 | E 9 |
27 | 28 | 42 | 56 | 48 | 8 | 8 | 41 | 46 | 73 | 17 | 106 | 28 | 35 | 22 | 8 | 7 | 7 | 7 | 6 | 6 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | S 6 | SE 9 | SSW 7 | WSW 8 | SW 8 | WSW 9 | WSW 9 | W 9 | WSW 8 | W 8 | W 8 | W 8 | W 9 | W 9 |
— | — | — | — | — | — | — | 46 | 13 | 191 | 588 | 653 | 502 | 677 | 586 | 460 | 364 | 350 | 428 | 640 | 641 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 11 | 11 | 11 | 11 | 11 | 0 | 14 | 0 | 230 | 2386 | 1303 | 2064 | 2064 | 1858 | 230 | 1874 | 16 | 11 | 0 | 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.











