Surf Forecasts:
Isla Santa Maria surf forecast from 15 Oct 2026:
- Best quality surf: Sunday 18 Oct, 9PM (local time) - 4.5ft (1.3m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 21 Oct, 6PM (local time) - 7.5ft (2.3m), 17s period, SW swell with 3,198 kJ wave energy.
- Next surfable swell (1★+): Sunday 18 Oct, 3AM (local time) - 3.5ft (1.1m), 14s period with SW 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 Sunday (Oct 18) at 3AM. The primary swell is predicted to be 1.1m and 14s period with a secondary swell of 1.7m and 8s. 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 2.3m 17s and forecast to arrive on Wednesday (Oct 21) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 18th Oct) | 3.5ft (1.1m) 14s |
| Best Surf | 9PM (Sun 18th Oct) | 4.5ft (1.3m) 16s |
| Most Powerful | 6PM (Wed 21st Oct) | 7.5ft (2.3m) 17s |
Table - best surf conditions forecast for Isla Santa Maria over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 19°C on Sat morning, min 17°C on Thu morning). Winds decreasing (fresh winds from the S on Fri afternoon, calm by Sat night). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Tue morning, min 17°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 15 | Friday 16 | Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | |||||||||||||||
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) | SW 17 | SW 16 | SW 15 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 8 | SW 16 | SW 16 | SW 14 | SW 14 | SW 18 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 640 | 746 | 648 | 1729 | 1984 | 1634 | 1123 | 886 | 541 | 310 | 314 | 864 | 810 | 978 | 1398 | 1524 | 1651 | 1685 | 1046 | 1684 | 1267 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | glassy | cross-off | cross-off | glassy | cross-on | cross-on | cross-on | on | glassy | cross | cross | cross |
High Tide | 1:16PM0.65m | 1:33AM1.02m | 2:12PM0.58m | 2:29AM0.96m | 3:29PM0.54m | 3:36AM0.92m | 5:04PM0.54m | 4:47AM0.90m | 6:20PM0.59m | 5:50AM0.92m | 7:09PM0.66m | 6:41AM0.94m | 7:44PM0.75m | ||||||||
Low Tide | 6:39PM0.28m | 8:40AM0.26m | 7:20PM0.33m | 9:55AM0.30m | 8:15PM0.39m | 11:16AM0.29m | 9:37PM0.43m | 12:20PM0.27m | 11:08PM0.43m | 1:03PM0.23m | 00:19AM0.40m | 1:36PM0.19m | 1:14AM0.35m | ||||||||
 | |  | |  |  | | | | | |  |  | | | | | | | | | |
 | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — |
 | — | 7:45 | — | — | 7:46 | — | — | 7:46 | — | — | 7:47 | — | — | 7:47 | — | — | 7:49 | — | — | 7:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 17 | 18 | 18 | 17 | 19 | 18 | 17 | 19 | 19 | 17 | 19 | 19 | 19 | 21 | 21 | 19 | 20 | 19 | 18 |
Feels °C | 15 | 15 | 14 | 16 | 15 | 14 | 17 | 14 | 14 | 18 | 17 | 16 | 19 | 19 | 20 | 21 | 21 | 20 | 19 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SSW 10 | SSW 6 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | SSW 7 | SSW 8 | SW 13 | SW 16 | SW 14 | SW 14 | SW 13 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 16 |
| kJ | 637 | 378 | 126 | 1729 | 1984 | 1634 | 1123 | 886 | 279 | 310 | 282 | 864 | 810 | 978 | 865 | 1524 | 1651 | 1685 | 1046 | 1684 | 1267 |
Swell 2 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 15 | SSW 7 | NW 24 | SSW 7 | SSW 7 | NW 21 | SW 14 | SW 13 | SW 16 | SSW 8 | SSW 7 | SW 20 | SW 18 | SW 13 | SW 12 | NW 16 | WSW 11 | SW 18 | SW 11 |
| kJ | 640 | 746 | 648 | 159 | 141 | 163 | 180 | 368 | 541 | 282 | 314 | 174 | 104 | 746 | 1398 | 591 | 298 | 127 | 211 | 460 | 524 |
Swell 3 Height (m) Direction Period (s) | WNW 18 | SW 12 | SW 11 | NW 16 | NW 16 | WNW 18 | NW 14 | NW 14 | SW 18 | SW 17 | NW 19 | NW 19 | SW 21 | SSW 7 | WNW 18 | SSW 6 | SW 6 | SSW 21 | SSW 20 | NW 16 | NW 15 |
| kJ | 31 | 48 | 163 | 65 | 67 | 30 | 33 | 54 | 50 | 287 | 303 | 59 | 351 | 81 | 209 | 15 | 9 | 45 | 253 | 42 | 60 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SSW 7 | — | — | SSW 7 | — | — | SSW 8 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 151 | — | — | 215 | — | — | 267 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 61 | 360 | 229 | 61 | 360 | 237 | 61 | 360 | 61 | 0 | 360 | 0 | 0 | 136 | 18 | 18 | 184 | 0 | 61 | 360 | 65 |
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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