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Surf Forecasts:
Right and Left Side surfForecast / Guam / Guam
12 Day Weather and Surf, issued 9 pm Thursday 18 Sep 2025 ChST
Best Forecast Surf Conditions for Right and Left Side this week:
The surf forecast for Right and Left Side over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 21) at 10PM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.7m and 6s. 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 12 days are 1.0m 11s and forecast to arrive on Wednesday (Sep 24) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Sunday (Sep 21) at 7AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 21st Sep) | 2ft (0.6m) 11s |
| Best Surf | 1AM (Tue 23rd Sep) | 2.5ft (0.7m) 9s |
| Most Powerful | 4AM (Wed 24th Sep) | 3.5ft (1.0m) 11s |
Table - best surf conditions forecast for Right and Left Side over the next 12 days.
Short Range Forecast Heavy rain (total 54mm), heaviest during Thu night. Warm (max 28°C on Fri night, min 26°C on Thu night). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 69mm), heaviest during Mon morning. Warm (max 28°C on Tue morning, min 24°C on Mon morning). Wind will be generally light. | |||||||||||||||||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thu 25 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 5 | 9 | 10 | 6 | 9 | 9 | 8 | 11 | 10 | 10 | 9 | 11 | 10 | 11 | 12 | 11 | 12 | 11 | 12 | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 68 | 20 | 5 | 15 | 8 | 43 | 15 | 16 | 21 | 112 | 125 | 88 | 83 | 153 | 144 | 213 | 233 | 213 | 183 | 167 | 244 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross- off | off | off | cross- off | off | off | cross- off | cross- off | cross | |
High Tide / height (m) | 4:46AM 0.80 | 7:03PM 0.85 | 5:52AM 0.82 | 7:26PM 0.86 | 6:49AM 0.83 | 7:47PM 0.87 | 7:42AM 0.84 | 8:07PM 0.87 | 8:31AM 0.85 | 8:27PM 0.86 | 9:19AM 0.84 | 8:47PM 0.85 | 10:07AM 0.82 | |||||||||
Low Tide / height (m) | 11:57PM 0.62 | 11:58AM 0.20 | 12:39AM 0.55 | 12:42PM 0.24 | 1:16AM 0.49 | 1:20PM 0.29 | 1:50AM 0.42 | 1:56PM 0.35 | 2:22AM 0.35 | 2:30PM 0.41 | 2:55AM 0.30 | 3:03PM 0.47 | 3:28AM 0.26 | 3:36PM 0.53 | ||||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thu 25 | ||||||||||||||||
| Sunrise | - | 6:09 | - | - | 6:09 | - | - | 6:09 | - | - | 6:09 | - | - | 6:09 | - | - | 6:09 | - | - | 6:09 | - | |
| Sunset | - | - | 6:20 | - | - | 6:19 | - | - | 6:17 | - | - | 6:16 | - | - | 6:16 | - | - | 6:15 | - | - | 6:15 | |
 |  |  |  | | |  | | | | | | | | | |  | | | |  | ||
Rain (mm) | 16 | 2 | - | 1 | 9 | 4 | 8 | 5 | 9 | 13 | 13 | 3 | 8 | 5 | 4 | 4 | 7 | 12 | 11 | 2 | - | |
| Temp. °C | 27 | 26 | 27 | 28 | 28 | 27 | 27 | 28 | 28 | 26 | 26 | 25 | 27 | 28 | 28 | 26 | 28 | 26 | 27 | 28 | 28 | |
| Feels °C (?) | 29 | 28 | 28 | 30 | 30 | 30 | 30 | 29 | 30 | 29 | 28 | 28 | 30 | 30 | 30 | 27 | 30 | 28 | 28 | 29 | 28 | |
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Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Guam
Continuing clean conditions at Right and Left Side (calm at Tamuning 4 km from Right and Left Side). 0.3m 8s swell from the ENE with a 0.3m 11s groundswell from the E. 2 swells combining to make bigger set waves.
1 h 35 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Right and Left Side surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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 12 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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