Surf Forecasts:
Hornitos surf forecast from 12 Sep 2026:
- Best quality surf: Sunday 13 Sep, 3AM (local time) - 4.5ft (1.3m), 10s period, SW swell with glassy winds.
- Most powerful swell: Saturday 12 Sep, 3PM (local time) - 4ft (1.2m), 12s period, SW swell with 383 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 3AM (local time) - 4.5ft (1.3m), 10s period with SW swell.
Best Forecast Surf Conditions for Hornitos this week:
The surf forecast for Hornitos over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 13) at 3AM. The primary swell is predicted to be 1.3m and 10s period with a secondary swell of 0.1m and 18s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Hornitos in the next 16 days are 1.2m 12s and forecast to arrive on Saturday (Sep 12) at 3PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 13th Sep) | 4.5ft (1.3m) 10s |
| Best Surf | 3AM (Sun 13th Sep) | 4.5ft (1.3m) 10s |
| Most Powerful | 3PM (Sat 12th Sep) | 4ft (1.2m) 12s |
Table - best surf conditions forecast for Hornitos over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s ahead.
First thing to know: the water at Hornitos is running about 66°, which is nearly 5° warmer than normal for this time of year. That’s a big deal – feels like the tail end of summer.
The start is rough. Saturday the 12th and Sunday the 13th are a bust. Swell is 3 to 4 ft from the SW, but with cross or onshore wind, it’s choppy and ugly. The combined energy on Saturday is 248 (moderate), but with that wind, forget it.
The first real shot comes Monday morning, the 14th. Glassy, clean 2 ft SW groundswell with a very long period of 18 seconds. Energy is a solid 467, but at a beach break like Hornitos, that long period might make it close out. Still, a glassy morning with that much energy is worth a look. The clear winners are Tuesday 15th and Wednesday 16th mornings. Tuesday is dead calm and glassy with a 3 ft SW swell at 14 seconds and energy of 360. Wednesday is also glassy, with 3 ft from the SW at 13 seconds. Small but clean, with good shape. Crowds are possible here on those days, so keep an eye out.
After that, it drops off. Thursday 17th is onshore junk. Friday 18th and Saturday 19th offer glassy starts but the waves are weak. The 19th morning has a 3 ft swell at 11 seconds and energy of 219 – nothing to get excited about.
There’s a long gap until Sunday the 27th. That morning shows another standout: glassy, 3 ft from the WSW, period of 13 seconds, and energy of 278. It’s two weeks out, so keep your hopes in check, but it’s worth a mark on the calendar. Days between the 20th and 26th are mostly small, weak, or blown out – a real quiet stretch. The 22nd and 23rd mornings are glassy with 3 ft swells, but at only 9 seconds, they’re weak and gutless.
Best bet: make it happen on Tuesday the 15th or Wednesday the 16th. Clean, small, and glassy.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Mon morning, min 16°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Thu afternoon, min 16°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 12 | SW 12 | SW 10 | SW 9 | SW 9 | SW 9 | SW 18 | SW 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | WSW 13 | WSW 13 | SW 12 | SW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 169 | 383 | 318 | 217 | 170 | 166 | 246 | 211 | 287 | 293 | 241 | 205 | 205 | 205 | 130 | 116 | 69 | 114 | 109 | 110 | 103 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-on | cross | on | cross | glassy | on | glassy | glassy | on | glassy | glassy | on | glassy | cross-on | on | cross-on | glassy | on | cross-off |
High Tide | 10:54AM1.15m | 11:22PM1.06m | 11:32AM1.05m | 00:00AM1.08m | 12:11PM0.94m | 00:39AM1.07m | 12:50PM0.82m | 1:20AM1.03m | 1:34PM0.71m | 2:07AM0.97m | 2:26PM0.61m | 3:06AM0.92m | 3:42PM0.54m | ||||||||
Low Tide | 5:13PM-0.00m | 5:28AM0.07m | 5:45PM0.04m | 6:14AM0.11m | 6:15PM0.10m | 7:02AM0.17m | 6:47PM0.17m | 7:55AM0.24m | 7:20PM0.24m | 8:59AM0.30m | 7:59PM0.30m | 10:24AM0.34m | 8:55PM0.36m | ||||||||
 | |  | | | | | | | | | | | |  |  |  | | | | | |
 | 7:41 | — | — | 7:39 | — | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:35 | — | — |
 | — | 7:34 | — | — | 7:34 | — | — | 7:34 | — | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — | 7:36 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 17 | 20 | 21 | 21 | 23 | 22 | 21 | 22 | 22 | 20 | 22 | 22 | 20 | 21 | 23 | 22 | 25 | 24 | 24 |
Feels °C | 18 | 18 | 17 | 18 | 20 | 20 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 22 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 12 | SW 10 | SW 9 | SW 9 | SW 9 | SW 10 | SW 9 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | WSW 13 | WSW 13 | SW 12 | SW 11 |
| kJ | 73 | 383 | 318 | 217 | 170 | 166 | 150 | 101 | 287 | 293 | 241 | 205 | 205 | 205 | 130 | 116 | 69 | 114 | 109 | 110 | 103 |
Swell 2 Height (m) Direction Period (s) | SW 12 | NW 12 | NW 12 | WSW 18 | SW 20 | SW 19 | SW 18 | SW 16 | SW 9 | SW 9 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SSW 8 | W 14 | SW 4 | SW 5 |
| kJ | 169 | 6 | 5 | 30 | 98 | 129 | 246 | 211 | 97 | 61 | 55 | 32 | 32 | 31 | 16 | 17 | 16 | 6 | 4 | 3 | 14 |
Swell 3 Height (m) Direction Period (s) | NW 12 | SW 19 | SW 18 | NW 12 | NW 12 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | NW 12 | WSW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | WSW 15 | W 13 | SW 21 | SW 20 | WSW 20 |
| kJ | 6 | 15 | 13 | 5 | 5 | 25 | 71 | 105 | 57 | 6 | 27 | 6 | 5 | 5 | 5 | 4 | 21 | 3 | 18 | 16 | 37 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 4 | SW 4 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 5 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 71 | 305 | 179 | 299 | 305 | 305 | 0 | 305 | 0 | 0 | 78 | 0 | 0 | 127 | 0 | 71 | 305 | 61 | 0 | 305 | 0 |
Best forecast wave conditions in Antofagasta | |||||||||||||||||||||
Best forecast wave conditions in Chile | |||||||||||||||||||||
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Information about the Hornitos Surf forecast
The above surf forecast table for Hornitos provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Hornitos can be found by selecting the local surf guide option on the grey menu. Our Hornitos 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 (Hornitos) 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 Hornitos 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.
Hornitos is 22 km (14 miles) from the city of Mejillones. If you plan a holiday in Antofagasta, look for hotels and other accommodation in Mejillones. Mejillones has rooms for a wide range of budgets as well as car hire and transport links.
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