Surf Forecasts:
Isla Santa Maria surf forecast from 18 Jul 2026:
- Best quality surf: Sunday 19 Jul, 2AM (local time) - 5ft (1.6m), 12s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 23 Jul, 2AM (local time) - 7ft (2.1m), 11s period, SW swell with 963 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 5PM (local time) - 4.5ft (1.3m), 10s period with WSW swell.
Best Forecast Surf Conditions for Isla Santa Maria this week:
The surf forecast for Isla Santa Maria over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 18) at 5PM. The primary swell is predicted to be 1.3m and 10s period with a secondary swell of 0.9m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Isla Santa Maria in the next 16 days are 2.1m 11s and forecast to arrive on Thursday (Jul 23) at 2AM. 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 6s period and expected on Wednesday (Jul 22) at 11AM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sat 18th Jul) | 4.5ft (1.3m) 10s |
| Best Surf | 2AM (Sun 19th Jul) | 5ft (1.6m) 12s |
| Most Powerful | 2AM (Thu 23rd Jul) | 7ft (2.1m) 11s |
Table - best surf conditions forecast for Isla Santa Maria over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 19°C on Sun morning, min 16°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Tue morning, min 14°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
AM | PM | 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) | WSW 10 | WSW 10 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 11 | SW 11 | SW 11 | SW 11 | SW 10 | SW 9 | SW 7 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 307 | 307 | 787 | 683 | 579 | 447 | 447 | 415 | 343 | 283 | 280 | 292 | 232 | 513 | 963 | 835 | 584 | 425 | 332 | 169 | 85 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | glassy | cross-on | on | cross | on | cross-on | on | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross | cross-off | cross |
High Tide | 12:19PM1.22m | 1:05AM0.88m | 1:04PM1.09m | 1:58AM0.91m | 1:51PM0.95m | 2:54AM0.92m | 2:43PM0.81m | 3:53AM0.93m | 3:44PM0.70m | 4:54AM0.95m | 4:58PM0.62m | 5:54AM0.97m | 6:14PM0.59m | ||||||||
Low Tide | 7:00PM0.02m | 6:49AM0.20m | 7:41PM0.07m | 7:51AM0.28m | 8:23PM0.14m | 9:02AM0.35m | 9:07PM0.20m | 10:24AM0.38m | 9:55PM0.25m | 11:49AM0.36m | 10:50PM0.29m | 1:00PM0.32m | 11:48PM0.29m | ||||||||
 | |  | | | | | | | |  | | | | | | | | | |  | |
 | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — |
 | — | 6:14 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 18 | 17 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 15 | 16 | 16 | 15 | 16 | 16 | 15 |
Feels °C | 17 | 18 | 18 | 17 | 17 | 18 | 17 | 17 | 18 | 16 | 15 | 13 | 12 | 13 | 12 | 13 | 13 | 13 | 13 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 11 | SW 11 | SW 11 | SW 11 | SW 10 | SW 9 | SW 7 | SW 7 |
| kJ | 307 | 307 | 787 | 683 | 579 | 447 | 447 | 415 | 343 | 283 | 280 | 292 | 232 | 513 | 963 | 835 | 584 | 425 | 332 | 169 | 85 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 12 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SW 24 | SW 22 | SSW 13 | SW 11 | SSW 11 | SSW 11 | SW 9 |
| kJ | 232 | 304 | 190 | 326 | 297 | 222 | 197 | 234 | 256 | 170 | 135 | 99 | 67 | 38 | 142 | 227 | 151 | 133 | 66 | 101 | 59 |
Swell 3 Height (m) Direction Period (s) | SSW 11 | SSW 10 | SSW 15 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | WNW 21 | WNW 21 | WNW 21 | SW 26 | SW 25 | WNW 20 | WNW 19 | SW 21 | SW 19 | SW 19 | SW 18 | WSW 10 |
| kJ | 78 | 65 | 123 | 5 | 5 | 5 | 4 | 4 | 4 | 45 | 44 | 43 | 105 | 100 | 75 | 72 | 224 | 184 | 184 | 155 | 41 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSW 4 | SSW 6 | S 6 | — | — | — | — | SW 7 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 14 | 90 | 67 | — | — | — | — | 189 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 28 | 0 | 0 | 18 | 35 | 10 | 184 | 35 | 18 | 184 | 360 | 35 | 360 | 184 | 35 | 229 | 360 | 35 | 184 | 184 | 61 |
Best forecast wave conditions in Antofagasta | |||||||||||||||||||||
Best forecast wave conditions in Chile | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 Isla Santa Maria 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 Isla Santa Maria Surf forecast
The above surf forecast table for Isla Santa Maria provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Isla Santa Maria can be found by selecting the local surf guide option on the grey menu. Our Isla Santa Maria 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 (Isla Santa Maria) 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 Isla Santa Maria 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.
Are you planning a holiday in Antofagasta? If you are looking for accommodation near Isla Santa Maria, camping, hotels and holiday cottages in Antofagasta, consider staying in Antofagasta which is 35 km (22 miles) away. Alternatively, find information about places to stay and car hire in Mejillones which is 39 km (24 miles) away
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