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.
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Surf Forecasts:
Boulders surfForecast / Upolu / Samoa
12 Day Weather and Surf, issued 12 pm Tuesday 16 Dec 2025 +13Forecast update in hr min s Forecast update imminent
Boulders surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Boulders sea temperature is
29.5° C
(Which is slightly warmer than usual)Best Forecast Surf Conditions for Boulders this week:
The surf forecast for Boulders over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Dec 19) at 7AM. The primary swell is predicted to be 0.6m and 18s period with a secondary swell of 0.8m and 9s. Another secondary swell of 1.1m and 6s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Boulders in the next 12 days are 1.2m 16s and forecast to arrive on Saturday (Dec 20) at 1AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Thursday (Dec 18) at 1AM.
| Wave Type | Time (+13) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 19th Dec) | 2ft (0.6m) 18s |
| Best Surf | 7PM (Fri 19th Dec) | 3.5ft (1.1m) 16s |
| Most Powerful | 1AM (Sat 20th Dec) | 4ft (1.2m) 16s |
Table - best surf conditions forecast for Boulders over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 22mm), heaviest during Tue morning. Warm (max 28°C on Tue morning, min 27°C on Tue morning). Mainly fresh winds. | Days 3-6 Weather Summary Heavy rain (total 21mm), heaviest during Sat night. Warm (max 29°C on Sun night, min 27°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 13 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 19 | 18 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 8 | 8 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 109 | 66 | 108 | 130 | 158 | 116 | 111 | 106 | 131 | 300 | 515 | 692 | 543 | 529 | 440 | 336 | 286 | 241 | 144 | 118 | 120 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | cross | cross | cross | cross | cross | cross- on | cross- off | cross- off | off | cross | off | glass | glass | cross- off | cross- off | cross | cross | cross- on |
High Tide / height (m) | 4:20PM 1.01 | 4:46AM 0.88 | 4:58PM 1.02 | 5:26AM 0.88 | 5:36PM 1.03 | 6:05AM 0.88 | 6:14PM 1.03 | 6:45AM 0.87 | 6:53PM 1.03 | 7:25AM 0.87 | 7:32PM 1.03 | 8:06AM 0.86 | 8:12PM 1.01 | ||||||||
Low Tide / height (m) | 10:04AM 0.28 | 10:46PM 0.24 | 10:41AM 0.27 | 11:24PM 0.21 | 11:18AM 0.26 | 12:02AM 0.19 | 11:56AM 0.25 | 12:40AM 0.18 | 12:34PM 0.25 | 1:18AM 0.18 | 1:12PM 0.25 | 1:57AM 0.18 | 1:51PM 0.27 | 2:37AM 0.20 | |||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||
| Sunrise | 5:52 | - | - | 5:54 | - | - | 5:54 | - | - | 5:54 | - | - | 5:54 | - | - | 5:56 | - | - | 5:56 | - | - |
| Sunset | - | 6:51 | - | - | 6:51 | - | - | 6:52 | - | - | 6:52 | - | - | 6:52 | - | - | 6:52 | - | - | 6:53 | - |
 | |  | | | | |  |  | | | | | | | |  |  | | | | |
Rain (mm) | 3 | 3 | 3 | 6 | 3 | 2 | 2 | - | - | - | - | 7 | 4 | 1 | 8 | 1 | - | - | 2 | 1 | 1 |
| Temp. °C | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 29 |
| Feels °C (?) | 30 | 29 | 29 | 27 | 30 | 28 | 28 | 29 | 30 | 30 | 29 | 29 | 32 | 30 | 31 | 32 | 31 | 33 | 31 | 31 | 32 |
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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 Boulders 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.
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Information about the Boulders Surf forecast
The above surf forecast table for Boulders provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Boulders can be found by selecting the local surf guide option on the grey menu. Our Boulders 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 (Boulders) 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 Boulders 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.
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