Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:

The most powerful waves expected at Mangandas in the next 12 days are 1.6m 9s and forecast to arrive on Tuesday (Dec 16) 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 2.2m 9s period and expected on Sunday (Dec 14) at 10AM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Tue 16th Dec) | 5ft (1.6m) 9s |
Table - best surf conditions forecast for Mangandas over the next 12 days.
Short Range Forecast Light rain (total 8mm), mostly falling on Sun night. Warm (max 29°C on Sat morning, min 27°C on Sat night). Mainly fresh winds. | Days 3-6 Weather Summary Moderate rain (total 10mm), heaviest on Tue afternoon. Warm (max 29°C on Tue morning, min 27°C on Mon night). Mainly fresh winds. | |||||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | ||||||||||||||||
| 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 (?) | N | N | N | N | ENE | NNE | N | NNE | NNE | N | N | NE | N | NNW | NNW | NNW | N | N | N | N | N | |
| Period(s) (?) | 10 | 9 | 9 | 8 | 9 | 13 | 9 | 9 | 11 | 12 | 11 | 10 | 11 | 10 | 10 | 10 | 16 | 14 | 12 | 11 | 11 | |
Wave (?)Graph | ||||||||||||||||||||||
| 118 | 102 | 99 | 48 | 0 | 16 | 79 | 146 | 322 | 217 | 114 | 137 | 56 | 237 | 250 | 190 | 118 | 242 | 233 | 192 | 141 | ||
Wind (km/h) | ENE | E | ENE | ENE | E | E | E | ENE | NE | NE | ENE | E | ENE | E | E | E | E | E | E | ENE | ENE | |
| 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 | 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) | 2:11AM 0.42 | 3:03PM 0.62 | 4:02AM 0.42 | 3:32PM 0.62 | 5:26AM 0.46 | 4:00PM 0.61 | 6:28AM 0.51 | 4:28PM 0.61 | 7:16AM 0.55 | 4:58PM 0.60 | 7:56AM 0.58 | 5:30PM 0.59 | 8:32AM 0.60 | 6:04PM 0.59 | ||||||||
Low Tide / height (m) | 8:07AM 0.17 | 9:59PM 0.16 | 9:04AM 0.26 | 10:45PM 0.07 | 10:03AM 0.33 | 11:23PM -0.01 | 11:03AM 0.38 | 11:58PM -0.08 | 11:58AM 0.41 | 12:31AM -0.13 | 12:47PM 0.42 | 1:04AM -0.17 | 1:30PM 0.43 | |||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | ||||||||||||||||
| Sunrise | - | 6:33 | - | - | 6:35 | - | - | 6:35 | - | - | 6:35 | - | - | 6:35 | - | - | 6:37 | - | - | 6:37 | - | |
| Sunset | - | - | 5:54 | - | - | 5:55 | - | - | 5:55 | - | - | 5:55 | - | - | 5:57 | - | - | 5:57 | - | - | 5:58 | |
Rain (mm) | - | 1 | - | - | 2 | 1 | 4 | - | - | - | - | 1 | 2 | 2 | 1 | 2 | 1 | 1 | 5 | - | - | |
| Temp. °C | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | |
| Feels °C (?) | 30 | 30 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 28 | 29 | 29 | 29 | 28 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | |

70-foot plus waves predicted for Portuguese big wave tow surfing competition.

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Mangandas 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.
The above surf forecast table for Mangandas provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Mangandas can be found by selecting the local surf guide option on the grey menu. Our Mangandas 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 (Mangandas) 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 Mangandas 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.
Mangandas is 14 km (9 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.

