Surf Forecasts:
Isla Santa Maria surf forecast from 20 Sep 2026:
- Best quality surf: Tuesday 22 Sep, 3AM (local time) - 5.5ft (1.7m), 10s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 26 Sep, 3PM (local time) - 5ft (1.6m), 13s period, WSW swell with 824 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 3AM (local time) - 3ft (0.9m), 12s 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 Monday (Sep 21) at 3AM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 1.0m and 6s. 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 1.6m 13s and forecast to arrive on Saturday (Sep 26) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 5s period and expected on Sunday (Sep 20) at 6PM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 21st Sep) | 3ft (0.9m) 12s |
| Best Surf | 3AM (Tue 22nd Sep) | 5.5ft (1.7m) 10s |
| Most Powerful | 3PM (Sat 26th Sep) | 5ft (1.6m) 13s |
Table - best surf conditions forecast for Isla Santa Maria over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 17°C on Sun morning, min 14°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Thu afternoon, min 15°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | |||||||||||||||
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 10 | SW 13 | SW 12 | SW 12 | SW 11 | SW 10 | SW 9 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 8 | SSW 8 | SSW 11 | WSW 12 | WSW 11 | WSW 11 | WSW 14 | WSW 14 | WSW 13 | WSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 120 | 176 | 240 | 293 | 338 | 576 | 499 | 631 | 627 | 419 | 312 | 173 | 157 | 214 | 230 | 186 | 197 | 361 | 746 | 824 | 711 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | glassy | cross-on | cross-off | glassy | cross | cross-off | glassy | cross | glassy | cross-off | cross | cross-off |
High Tide | 6:54PM0.57m | 6:47AM0.94m | 7:45PM0.62m | 7:36AM0.99m | 8:22PM0.69m | 8:15AM1.04m | 8:53PM0.76m | 8:49AM1.08m | 9:23PM0.85m | 9:23AM1.09m | 9:52PM0.93m | 9:56AM1.08m | 10:23PM1.02m | ||||||||
Low Tide | 1:13PM0.29m | 11:53PM0.39m | 1:59PM0.24m | 00:58AM0.34m | 2:32PM0.19m | 1:46AM0.29m | 3:00PM0.15m | 2:28AM0.24m | 3:25PM0.11m | 3:07AM0.19m | 3:50PM0.08m | 3:46AM0.15m | 4:15PM0.06m | ||||||||
 | |  | | | | |  | | | |  | | | | | | | | | | |
 | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:28 | — | — |
 | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — | 7:38 | — | — | 7:38 | — | — | 7:38 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 16 | 15 | 17 | 17 | 15 | 16 | 17 | 15 | 16 | 17 | 15 | 17 | 18 | 16 | 17 | 18 | 16 | 18 | 18 | 16 |
Feels °C | 16 | 13 | 11 | 16 | 15 | 13 | 15 | 16 | 14 | 15 | 16 | 15 | 17 | 17 | 16 | 17 | 16 | 16 | 17 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 10 | SW 10 | SW 12 | SW 12 | SW 11 | SW 10 | SW 9 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 8 | SSW 8 | SSW 11 | WSW 12 | WSW 11 | WSW 11 | SW 11 | WSW 14 | WSW 13 | WSW 13 |
| kJ | 120 | 100 | 240 | 293 | 338 | 576 | 499 | 631 | 627 | 419 | 312 | 173 | 157 | 214 | 230 | 186 | 197 | 273 | 746 | 824 | 711 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 13 | SSW 5 | SSW 6 | NW 12 | W 11 | SSW 12 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | SSW 12 | WSW 14 | WSW 13 | SSW 10 | SSW 9 | WSW 16 | WSW 14 | SSW 6 | SW 16 | SW 15 |
| kJ | 79 | 176 | 37 | 75 | 6 | 2 | 119 | 261 | 125 | 108 | 48 | 82 | 81 | 154 | 111 | 76 | 188 | 361 | 33 | 245 | 171 |
Swell 3 Height (m) Direction Period (s) | SW 20 | W 12 | WSW 18 | SW 18 | — | — | NW 16 | NW 16 | SSW 14 | SSW 13 | SSW 13 | WSW 9 | WSW 10 | SW 9 | SW 20 | SW 19 | SW 18 | SW 17 | SW 16 | SW 21 | SSW 12 |
| kJ | 15 | 11 | 31 | 12 | — | — | 10 | 10 | 40 | 68 | 65 | 33 | 36 | 20 | 97 | 126 | 154 | 148 | 127 | 72 | 82 |
Wind waves Height (m) Direction Period (s) | SSW 5 | SSW 5 | — | — | SSW 6 | — | — | — | — | — | — | — | — | — | — | — | SSW 6 | — | — | — | — |
| kJ | 24 | 24 | — | — | 80 | — | — | — | — | — | — | — | — | — | — | — | 24 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 61 | 360 | 35 | 61 | 136 | 136 | 0 | 358 | 0 | 0 | 136 | 0 | 0 | 184 | 0 | 0 | 360 | 0 | 0 | 184 | 0 |
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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