Surf Forecasts:
Right and Left Side surf forecast from 15 Sep 2026:
- Most powerful swell: Wednesday 23 Sep, 1AM (local time) - 4.5ft (1.4m), 13s period, NNW swell with 638 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 1.4m 13s and forecast to arrive on Wednesday (Sep 23) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Friday (Sep 18) at 4AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Wed 23rd Sep) | 4.5ft (1.4m) 13s |
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 coming up. Straight up, I’ve got to be honest with you – this stretch is a tough one for Right and Left Side. The whole 16-day window is pretty much a write-off for a decent paddle session.
We kick off on Wednesday the 16th of September with a risk of thunderstorms and cross-onshore winds at 12 mph. Swell is a weak 3 ft from the NE with a short period of 9 seconds, and the combined energy is a meagre 155 – just not enough push to fight that chop. That poor surf condition tag sticks with us all the way through the first week. Thursday the 17th drops even smaller, down to 3 ft, and the wind stays cross-on.
The weekend and into the following week don’t offer any relief. Cross-shore winds, small swell – we’re looking at 2 ft to 3 ft from the NNE and N. The combined energy bounces around between 85 and 202, but it’s all messy. Even when we get a glimpse of offshore wind (NW at 3 mph) on Monday the 22nd of September, the 3 ft swell is just too marginal for this exposed reef spot. The lone glimmer of a longer period (13 seconds) on the 21st of September afternoon brings swell to 4 ft from the NNW, but it’s accompanied by onshore wind and a poor surf rating.
The only real spike in size happens right at the tail end – the 28th and 29th of September. We see a jump to 5 ft and 7 ft from the west, but it’s short-period wind swell (6 to 7 seconds) and straight cross-onshore winds at 16 mph. Combined energy hits 472 and 300, but the quality is hopeless for a reef break – kite surfers might have more fun in that onshore mess. After that, it fizzles out again to tiny stuff.
That Monday the 22nd of September morning gave us the only flicker of potential with light offshore wind and a 3 ft swell (energy 233), but it was only scored as marginal. Inconsistent is the word for this break, and this forecast proves it – there’s just nothing to get excited about. Keep the board in the bag and check back, because forecasts can change.
Rusty.
Short Range ForecastHeavy rain (total 30mm), heaviest during Wed morning. Warm (max 29°C on Wed morning, min 27°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 24mm), heaviest during Sun night. Warm (max 29°C on Sat morning, min 28°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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) | ENE 14 | NE 9 | NE 9 | ENE 9 | NE 8 | NE 8 | NE 8 | NE 11 | NNE 10 | NNE 10 | NNE 9 | N 9 | N 10 | N 10 | NNW 10 | NNW 10 | NNW 10 | NNW 13 | NNW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 183 | 155 | 241 | 138 | 84 | 102 | 72 | 169 | 130 | 104 | 90 | 85 | 113 | 151 | 157 | 214 | 184 | 367 | 412 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross | cross-on | cross-on | cross-on | on | on | on |
High Tide | 11:47AM0.78m | 10:11PM0.83m | 12:54PM0.75m | 10:37PM0.81m | 2:16PM0.73m | 11:08PM0.78m | 3:51PM0.73m | 11:50PM0.76m | 5:02PM0.75m | 00:58AM0.74m | 5:44PM0.77m | 2:29AM0.73m | |||||||
Low Tide | 4:50AM0.22m | 4:44PM0.60m | 5:34AM0.23m | 5:21PM0.64m | 6:23AM0.24m | 6:07PM0.67m | 7:21AM0.25m | 7:20PM0.70m | 8:25AM0.26m | 9:08PM0.70m | 9:29AM0.26m | 10:30PM0.68m | |||||||
 |  | | | |  | | | | | | | |  | | | | | | |
 | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — |
mm | 2 | 7 | 4 | 10 | 1 | — | 3 | 2 | 1 | 4 | — | 4 | 7 | — | 1 | 7 | — | 1 | 2 |
Temp °C | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 32 | 31 | 31 | 31 | 31 | 30 | 30 | 31 | 30 | 30 | 31 | 31 | 31 | 33 | 32 | 32 | 33 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | NE 8 | NE 9 | NE 9 | ENE 9 | SSW 7 | SSW 8 | SW 8 | SW 8 | NNE 10 | SW 8 | WSW 8 | WSW 8 | WSW 8 | SW 8 | WSW 8 | NNW 10 | NNW 10 | NNW 13 | NNW 12 |
| kJ | 166 | 155 | 241 | 138 | 82 | 161 | 239 | 262 | 130 | 256 | 179 | 161 | 133 | 116 | 101 | 214 | 184 | 367 | 412 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | S 8 | SW 8 | SW 8 | NE 8 | NE 8 | NE 8 | NE 11 | ENE 11 | NNE 10 | NNE 9 | N 9 | N 10 | N 10 | NNW 10 | SW 7 | SW 7 | SW 7 | SW 8 |
| kJ | 68 | 72 | 80 | 80 | 84 | 102 | 72 | 169 | 49 | 104 | 90 | 85 | 113 | 151 | 157 | 79 | 100 | 77 | 110 |
Swell 3 Height (m) Direction Period (s) | ENE 14 | SW 8 | S 7 | S 8 | WSW 8 | WSW 8 | NE 12 | NE 11 | SSE 7 | SE 8 | S 6 | S 6 | S 7 | S 6 | S 6 | NE 11 | NE 10 | NE 12 | NE 11 |
| kJ | 183 | 58 | 51 | 42 | 45 | 42 | 35 | 33 | 15 | 18 | 19 | 20 | 22 | 22 | 20 | 90 | 49 | 112 | 94 |
Wind waves Height (m) Direction Period (s) | — | — | SW 8 | SW 8 | — | — | — | — | WSW 8 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 132 | 208 | — | — | — | — | 230 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 11 | 11 | 16 | 16 | 16 | 11 | 11 | 230 | 1908 | 16 | 230 | 230 | 230 | 11 | 11 | 11 | 11 | 11 | 11 |
Best forecast wave conditions in Guam | |||||||||||||||||||
Best forecast wave conditions in Guam | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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