Surf Forecasts:
Right and Left Side surf forecast from 12 Jul 2026:
- Best quality surf: Monday 13 Jul, 4AM (local time) - 4.5ft (1.3m), 12s period, WNW swell with cross-offshore winds.
- Most powerful swell: Sunday 12 Jul, 4PM (local time) - 5ft (1.5m), 13s period, W swell with 775 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 4AM (local time) - 4.5ft (1.3m), 12s period with WNW 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 (Jul 13) at 4AM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 1.0m and 8s. 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 1.5m 13s and forecast to arrive on Sunday (Jul 12) at 4PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Friday (Jul 17) at 10AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Mon 13th Jul) | 4.5ft (1.3m) 12s |
| Best Surf | 4AM (Mon 13th Jul) | 4.5ft (1.3m) 12s |
| Most Powerful | 4PM (Sun 12th Jul) | 5ft (1.5m) 13s |
Table - best surf conditions forecast for Right and Left Side over the next 16 days.
Right and Left Side is a reef break that’s inconsistent and only for advanced surfers. It’s exposed to swell from the north and the optimum swell direction is north, so it takes a very specific combo to get it working. The water temp is sitting at 84°F with a -0.9°F anomaly, so that’s pretty much average for this time of year – nothing weird going on there.
The first decent window kicks off Sunday morning, July 12th. We’ve got a 5ft swell from the WNW with a 13 second period, which is a nice groundswell. The combined energy is strong at 1005, so there’s plenty of push. The catch is the wind is a cross-off from the ENE at 16 mph, so it’ll be clean but a bit of a side-wind feel. It’s marginal surf forecast though, so tide might be a factor. Monday morning, July 13th, looks a bit cleaner with a 3ft WNW swell (12s period, 415 energy) and a proper offshore from the SE at 12 mph. That’s a good combo for shape, but the swell is on the smaller side.
After Monday afternoon, things go flat and messy. From Tuesday, July 14th, through to Friday, July 24th, it’s pretty much a write-off. Swell drops below 3ft, winds turn cross or cross-on, and the energy readings sink into the double digits or zero. That’s a solid 10-day gap with nothing worth paddling out for.
The next and only real standout is Saturday morning, July 25th. A 6ft swell from the west with an 8-second period – that’s short period, wind swell, so it’ll be a bit crumbly and not as clean as a groundswell. The energy is moderate at 542, and the wind is a light cross from the southwest at 6 mph, so it’ll be glassy on the face. This is the best bet on offer, but it’s still a marginal call due to tide conditions. For experts only, definitely not for beginners.
Sunday, July 26th, and Monday, July 27th, see the swell jump to 8ft to 10ft from the west, but the wind is a moderate to fresh cross-shore, creating lumpy chop. The energy is very strong (1399 to 1837), but the quality is poor. At that size, it’s only for experts, and with the wind, it’s more of a kite-surfing setup than a good paddle session.
So, if you’re an advanced surfer who knows this reef, Saturday morning July 25th is your one shot. The rest of the period is either flat, too small, or blown out.
Rusty
Short Range ForecastHeavy rain (total 36mm), heaviest during Tue night. Warm (max 29°C on Sun morning, min 26°C on Mon afternoon). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 81mm), heaviest during Thu night. Warm (max 28°C on Wed morning, min 26°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
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 13 | W 13 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | WNW 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | ENE 9 | ENE 9 | ENE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 811 | 775 | 514 | 313 | 250 | 183 | 133 | 123 | 88 | 52 | 28 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 29 | 28 | 28 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | off | cross-on | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-on | cross | cross | cross | cross-on | cross |
High Tide | 7:39PM0.87m | 4:45AM0.93m | 8:28PM0.91m | 5:45AM0.95m | 9:11PM0.93m | 6:45AM0.95m | 9:50PM0.94m | 7:44AM0.93m | 10:26PM0.94m | 8:44AM0.90m | 10:59PM0.94m | 9:45AM0.84m | 11:30PM0.93m | ||||||||
Low Tide | 11:47AM0.00m | 00:00AM0.74m | 12:41PM-0.05m | 1:03AM0.73m | 1:33PM-0.07m | 2:00AM0.71m | 2:22PM-0.06m | 2:54AM0.67m | 3:09PM-0.00m | 3:47AM0.62m | 3:53PM0.08m | 4:41AM0.56m | 4:34PM0.19m | ||||||||
 | |  | |  |  |  | | | | | | | | | | | | | | | |
 | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — |
mm | 3 | 2 | 2 | 3 | 6 | 3 | — | 4 | 13 | 2 | 7 | 14 | 2 | 7 | 20 | 11 | 2 | 16 | 13 | 5 | 1 |
Temp °C | 29 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 27 | 27 | 27 | 28 |
Feels °C | 31 | 30 | 31 | 30 | 29 | 31 | 30 | 30 | 30 | 28 | 29 | 28 | 26 | 26 | 25 | 27 | 25 | 27 | 28 | 28 | 30 |
Swell 1 Height (m) Direction Period (s) | WNW 13 | W 13 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | SE 8 | SSE 8 | SE 8 | WNW 10 | SSE 8 | SSE 8 | SE 8 | SE 8 | SE 8 | E 10 | S 8 | SSE 7 | NW 7 | S 6 | ENE 9 |
| kJ | 811 | 775 | 514 | 313 | 250 | 183 | 251 | 264 | 59 | 52 | 26 | 27 | 34 | 33 | 31 | 16 | 172 | 89 | 16 | 27 | 28 |
Swell 2 Height (m) Direction Period (s) | WSW 10 | SE 11 | WSW 9 | E 8 | WSW 9 | SE 8 | WNW 11 | WNW 11 | WNW 11 | E 10 | WNW 9 | E 10 | E 10 | E 10 | E 10 | SE 12 | E 10 | E 10 | ENE 9 | ENE 9 | S 8 |
| kJ | 80 | 18 | 47 | 102 | 27 | 68 | 133 | 123 | 88 | 17 | 28 | 17 | 16 | 16 | 16 | 6 | 16 | 16 | 29 | 28 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 11 | S 10 | SE 9 | WSW 9 | SE 9 | E 8 | WSW 9 | NNE 9 | E 10 | NNE 8 | E 10 | WNW 8 | NNE 8 | NE 8 | SE 12 | NE 8 | SE 12 | NNW 7 | SE 11 | NW 8 | SE 11 |
| kJ | 19 | 2 | 13 | 27 | 14 | 71 | 15 | 8 | 30 | 6 | 17 | 14 | 6 | 3 | 6 | 2 | 5 | 5 | 5 | 11 | 5 |
Wind waves Height (m) Direction Period (s) | E 7 | E 8 | E 8 | — | E 8 | — | SW 3 | WSW 8 | SW 7 | SSW 7 | SW 7 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | WSW 9 | WSW 8 | SW 8 | WSW 8 | WSW 7 |
| kJ | 194 | 187 | 167 | — | 84 | — | 2 | 12 | 211 | 286 | 210 | 292 | 331 | 565 | 489 | 1137 | 684 | 372 | 423 | 276 | 314 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1835 | 2067 | 19 | 0 | 0 | 11 | 230 | 1904 | 232 | 232 | 232 | 2055 | 1874 | 2091 | 2199 | 16 | 2199 | 2064 | 1865 | 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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