Surf Forecasts:
Right and Left Side surf forecast from 15 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 1AM (local time) - 5ft (1.5m), 8s period, W swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 10AM (local time) - 4.5ft (1.3m), 12s period, E swell with 522 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 1AM (local time) - 5ft (1.5m), 8s 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 1.5m and 8s period with a secondary swell of 0.4m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Right and Left Side in the next 16 days are 1.3m 12s and forecast to arrive on Saturday (Aug 22) at 10AM. 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 7s period and expected on Monday (Aug 17) at 4PM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Tue 18th Aug) | 5ft (1.5m) 8s |
| Best Surf | 1AM (Tue 18th Aug) | 5ft (1.5m) 8s |
| Most Powerful | 10AM (Sat 22nd Aug) | 4.5ft (1.3m) 12s |
Table - best surf conditions forecast for Right and Left Side over the next 16 days.
The Lowdown
Alright, grab your board and let’s talk about what’s on the menu for the next couple of weeks at Right and Left Side.
Honestly, things start out pretty messy. We’ve got a run of poor conditions stretching from Sunday the 16th through most of the coming week. The wind is mostly cross or cross-onshore, there’s a real risk of thunderstorms, and the surf is small and weak for the most part. The energy is there, but it’s not organized. The water temp is 84°, which is about average for this time of year, so you won’t need a spring suit.
The first real glimmer of hope comes on Tuesday morning, the 18th of August. It’s looking glassy, with the wind dropping right out. The swell is only around 4ft from the west, with a period of 8 seconds. It’s not a world-beater, but if you can get out early and the tide plays nice, it’s a chance at some clean if not super rippable waves. The combined energy is moderate at 207.
From Tuesday, it’s back to the grind. We’ve got a solid stretch of poor days, with that cross-chop and gusty winds hanging around all the way through Friday the 21st. The swell stays in the 3ft range, and the energy drops off a bit.
Then things look like they could start to change. Around Saturday the 22nd, we see a pulse of longer period swell coming in from the east and northeast, with periods jumping up to 12 seconds. The wave heights are over 4ft, and the energy is getting strong (564 in the morning). The wind is still cross, which is not ideal, but it’s looking a lot better than what we’ve had. Keep an eye on the Saturday morning session.
The real potential, though, is tipping into the following week. From Tuesday the 25th, we’ve got a solid run of bigger swell. We’re looking at 6ft to 6ft waves from the north on Tuesday, with the period extending to 13 and even 14 seconds. The energy readings are way up, hitting over 1000. This is the most substantial swell we see in the whole window. The problem is, the wind is still mostly cross-shore, making things a little lumpy. If that wind cleans up, this could be the standout period.
There’s a moment on Wednesday morning the 26th that looks like it might be the best of the lot – 6ft from the NNW with a 13-second period and a gentle cross-shore breeze. The energy is strong (1040). It’s a real chance for some proper waves, but you’ll need to pick your corners.
After that, the end of the month gets wild. We see a big jump in size around the 29th of August, with 10ft surf on the cards. But with that comes a strong breeze and messy, cross-shore conditions. This looks more like a battle than a surf session right now. It’s big, it’s powerful, and it’s going to be closing out all over the place. If you’ve got a twin tip, you might be in business, but for the paddle surfer, it’s a lot of work for not much reward.
So, to sum it up: the first week is mostly a write-off. The second week, particularly around the 25th and 26th, has real potential if the wind plays ball. And the final days are just too messy and big to recommend.
Rusty out.
Short Range ForecastHeavy rain (total 44mm), heaviest during Sun afternoon. Warm (max 29°C on Sun morning, min 26°C on Sun afternoon). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Wed morning. Warm (max 29°C on Thu morning, min 27°C on Wed morning). Winds decreasing (fresh winds from the NNW on Wed afternoon, calm by Fri night). | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 8 | W 8 | W 8 | W 8 | NE 9 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 9 | W 8 | W 8 | WNW 10 | WNW 10 | WNW 10 | E 16 | E 12 | ENE 12 | ENE 12 |
Wave Graph | |||||||||||||||||||||
264 | 257 | 246 | 239 | 22 | 259 | 187 | 156 | 135 | 113 | 169 | 220 | 115 | 116 | 133 | 125 | 128 | 236 | 522 | 439 | 480 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross-on | cross-off | glassy | on | on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross | cross-on | glassy | cross | cross | cross |
High Tide | 10:27PM0.91m | 10:51AM0.79m | 10:52PM0.89m | 11:57AM0.74m | 11:17PM0.87m | 1:14PM0.71m | 11:43PM0.84m | 2:50PM0.69m | 00:13AM0.82m | 4:40PM0.70m | 00:52AM0.79m | 5:59PM0.73m | 1:47AM0.78m | ||||||||
Low Tide | 4:04PM0.33m | 4:54AM0.36m | 4:38PM0.43m | 5:41AM0.32m | 5:12PM0.52m | 6:29AM0.29m | 5:46PM0.59m | 7:21AM0.28m | 6:24PM0.65m | 8:19AM0.26m | 7:23PM0.69m | 9:20AM0.25m | 9:03PM0.71m | ||||||||
6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 6:42 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:39 | — | — | 6:38 | — | — | 6:38 | — | |
mm | 1 | 11 | 14 | 4 | 6 | 2 | 2 | — | 4 | 8 | 2 | — | — | — | 1 | — | — | — | — | — | 3 |
Temp °C | 29 | 28 | 27 | 28 | 28 | 28 | 29 | 29 | 28 | 27 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 31 | 31 | 30 | 30 | 30 | 33 | 33 | 32 | 31 | 28 | 27 | 29 | 31 | 32 | 32 | 34 | 32 | 34 | 31 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | W 8 | NNE 11 | NE 10 | NE 9 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 9 | W 8 | W 8 | WNW 10 | WNW 10 | WNW 10 | W 10 | E 12 | ENE 12 | ENE 12 |
264 | 257 | 24 | 24 | 22 | 259 | 187 | 156 | 135 | 113 | 169 | 220 | 115 | 116 | 133 | 125 | 128 | 92 | 522 | 439 | 480 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | E 8 | E 9 | NE 9 | NE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | W 11 | NE 6 | NE 6 | NE 6 | E 16 | SSE 9 | SSE 9 | SSE 9 |
15 | 15 | 14 | 13 | 13 | 21 | 20 | 20 | 43 | 41 | 42 | 42 | 41 | 59 | 40 | 29 | 30 | 236 | 94 | 121 | 172 | |
Swell 3 Height (m) Direction Period (s) | ENE 9 | ENE 9 | E 8 | SE 10 | SE 9 | E 9 | SE 9 | NE 9 | NE 9 | NE 8 | NNE 8 | E 9 | WNW 10 | SE 9 | WSW 8 | WSW 8 | WSW 8 | SSE 9 | W 9 | W 10 | W 9 |
8 | 16 | 13 | 15 | 14 | 13 | 21 | 20 | 19 | 18 | 7 | 14 | 51 | 38 | 55 | 41 | 41 | 52 | 42 | 67 | 43 | |
Wind waves Height (m) Direction Period (s) | — | — | W 8 | W 8 | WSW 7 | — | — | — | — | NW 4 | NNW 5 | N 5 | NNE 5 | NNE 6 | — | — | — | — | — | — | WSW 8 |
— | — | 246 | 239 | 327 | — | — | — | — | 36 | 90 | 65 | 55 | 55 | — | — | — | — | — | — | 44 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 16 | 230 | 230 | 230 | 0 | 0 | 16 | 11 | 2068 | 2067 | 2068 | 1995 | 1289 | 0 | 19 | 26 | 0 | 1995 | 2065 | 2073 |
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.











