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Boat Basin Lefts surfForecast / Guam / Guam
12 Day Weather and Surf, issued 3 pm Monday 24 Mar 2025 ChST
Best Forecast Surf Conditions for Boat Basin Lefts this week:
The surf forecast for Boat Basin Lefts over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Mar 25) at 1AM. The primary swell is predicted to be 1.5m and 9s period with a secondary swell of 0.6m and 11s. Another secondary swell of 0.4m and 13s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Boat Basin Lefts in the next 12 days are 2.0m 8s and forecast to arrive on Monday (Mar 31) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Friday (Mar 28) at 10AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Tue 25th Mar) | 5ft (1.5m) 9s |
| Best Surf | 10PM (Tue 25th Mar) | 4.5ft (1.3m) 9s |
| Most Powerful | 7AM (Mon 31st Mar) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Boat Basin Lefts over the next 12 days.
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Sat 05 | ||||||||||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 12 | 6 | 8 | 8 | 7 | 8 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 9 | 11 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 367 | 367 | 367 | 320 | 275 | 225 | 220 | 190 | 215 | 215 | 173 | 35 | 116 | 181 | 142 | 156 | 258 | 212 | 294 | 453 | 485 | 383 | 368 | 401 | 383 | 284 | 316 | 239 | 225 | 413 | 290 | 409 | 556 | 380 | 611 | 666 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 5:53AM 0.82 | 2:52PM 0.77 | 6:20AM 0.85 | 4:21PM 0.80 | 6:44AM 0.88 | 5:38PM 0.84 | 7:09AM 0.91 | 6:46PM 0.88 | 7:34AM 0.92 | 7:51PM 0.91 | 8:00AM 0.94 | 8:53PM 0.93 | 8:28AM 0.94 | 9:56PM 0.93 | 8:58AM 0.93 | 11:01PM 0.91 | 9:31AM 0.92 | 12:09AM 0.87 | 10:07AM 0.89 | 1:26AM 0.84 | 10:47AM 0.85 | 2:50AM 0.82 | 11:38AM 0.80 | |||||||||||||
Low Tide / height (m) | 9:43PM 0.21 | 10:48AM 0.69 | 10:43PM 0.19 | 11:39AM 0.63 | 11:36PM 0.19 | 12:23PM 0.55 | 12:26AM 0.22 | 1:05PM 0.44 | 1:13AM 0.27 | 1:47PM 0.33 | 2:00AM 0.34 | 2:29PM 0.22 | 2:45AM 0.43 | 3:14PM 0.13 | 3:31AM 0.52 | 4:01PM 0.08 | 4:18AM 0.60 | 4:50PM 0.06 | 5:09AM 0.66 | 5:44PM 0.08 | 6:09AM 0.70 | 6:45PM 0.12 | 7:29AM 0.72 | |||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Sat 05 | ||||||||||||||||||||||||
| Sunrise | - | - | 6:22 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:18 | - | - | 6:18 | - | - | 6:18 | - | - | 6:16 | - | - | 6:16 | - | - | 6:16 | - | - | 6:15 | - | - | 6:15 |
| Sunset | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - | 6:31 | - | - |
 |  |  | |  | | | | | |  |  | |  | | | | | | | | | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | 1 | - | - | 2 | - | - | - | - | 2 | 2 | - | 4 | 1 | - | - | - | - | 2 | 3 | 1 | - | - | - | - | - | - | 2 | 2 | 1 | - | - | - | - | - |
| Temp. °C | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 26 | 28 | 28 | 27 | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 |
| Feels °C (?) | 27 | 27 | 26 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 28 | 28 | 28 | 29 | 29 |
Short Range Forecast: Light rain (total 3mm), mostly falling on Tue morning. Warm (max 28°C on Mon afternoon, min 26°C on Mon night). Mainly fresh winds. | Days 3-6 Weather Summary Light rain (total 9mm), mostly falling on Fri night. Warm (max 29°C on Fri morning, min 26°C on Thu night). Wind will be generally light. | Days 6-9 Weather Summary Light rain (total 6mm), mostly falling on Mon morning. Warm (max 28°C on Sun afternoon, min 26°C on Sun night). Mainly fresh winds. | Long Range Forecast: Light rain (total 5mm), mostly falling on Wed night. Warm (max 29°C on Sat morning, min 26°C on Wed night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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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 Boat Basin Lefts 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 Boat Basin Lefts Surf forecast
The above surf forecast table for Boat Basin Lefts provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Boat Basin Lefts can be found by selecting the local surf guide option on the grey menu. Our Boat Basin Lefts 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 (Boat Basin Lefts) 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 Boat Basin Lefts 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.
Boat Basin Lefts 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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