Surf Forecasts:
El Estero surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 9PM (local time) - 3.5ft (1.1m), 16s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 18 Aug, 9PM (local time) - 3.5ft (1.1m), 16s period, SW swell with 539 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 6PM (local time) - 3.5ft (1.0m), 16s period with SW swell.
Best Forecast Surf Conditions for El Estero this week:
The surf forecast for El Estero over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 6PM. The primary swell is predicted to be 1.0m and 16s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at El Estero in the next 16 days are 1.1m 16s and forecast to arrive on Tuesday (Aug 18) at 9PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 11s period and expected on Friday (Aug 21) at 9AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 18th Aug) | 3.5ft (1.0m) 16s |
| Best Surf | 9PM (Tue 18th Aug) | 3.5ft (1.1m) 16s |
| Most Powerful | 9PM (Tue 18th Aug) | 3.5ft (1.1m) 16s |
Table - best surf conditions forecast for El Estero over the next 16 days.
The Lowdown
G’day, Rusty here, checking in on the local stretch. We’ve got a pretty solid run of surf on the way, with the best action bookending the forecast. The standout is looking like a real treat for the experienced crew, but there’s plenty of fun to be had in between if you’re patient.
The pattern starts with a clean, workable swell. Tuesday morning (18 August) at El Estero kicks things off with a nice 4ft SW swell, a long 14-second period, and a light offshore breeze from the ENE. The combined energy is a solid moderate 430. The water is sitting at 86°, which is a touch warmer than normal for this time of year, so it’s a pleasant dip. This is a consistent river mouth, so it should be offering up some fun, clean waves. Expect crowds to be likely, but with a set-up like this, it’s worth sharing.
Wednesday morning (19 August) sees the swell easing a little to 3ft, but the period stretches to 15 seconds, keeping that groundswell quality. A gentle offshore from the E keeps it clean, and the energy is still moderate at 367. Wednesday afternoon turns glassy with a 3 mph SSE wind, making for some stunning, clean conditions on the same 3ft swell.
The swell drops off through Thursday (20 August) and into Friday (21 August), with heights slipping to 1-2ft. The energy drops too, down to 116 on Friday morning. Winds stay favourable for the most part, but the surf is small. There’s a bit of a lull over the weekend, with Saturday morning (22 August) seeing a moderate breeze but a clean 2ft swell, though the energy is weak at 102.
Into the next week, the swell builds back. Sunday morning (23 August) has a 2ft swell but a very long 19-second period, pushing the energy up to 269. A gentle offshore from the ENE keeps it tidy. By Monday morning (24 August), the swell is 2ft with an 18-second period, and while the wind is a moderate offshore, the energy is building to 363. The afternoons are a bit mucky with cross-onshore winds, so mornings are the go.
The real action kicks off on Saturday, 29 August. The morning brings a solid 5ft SW swell, a long 16-second period, and a light offshore breeze from the E. The combined energy absolutely jumps to 1288, which is a strong, powerful swell. This is a big one for the experienced surfers, as it’s over 5ft and pushing into bigger territory. It’s clean, it’s got punch, and it’s consistent. Sunday morning (30 August) follows up with a similar 5ft swell and 1020 energy, with a cross-off wind keeping it clean. These two days are the true standouts of the whole window.
The swell starts to ease from Monday, 31 August, with a 4ft SW swell and a 14-second period, but the energy is still a solid 594. A glassy morning on the 1st of September (Tuesday) with a 3ft swell and a 13-second period rounds out the run nicely.
So, overall, you’ve got small, clean waves to start, a bit of a lull in the middle of next week, and then a cracking weekend of bigger, more powerful surf for the experienced crew. The best of the best is Saturday the 29th and Sunday the 30th of August at El Estero – get in early if you want a piece of it.
Rusty.
Short Range ForecastHeavy rain (total 29mm), heaviest during Tue afternoon. Warm (max 30°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sun afternoon. Warm (max 32°C on Sat morning, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 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) | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SSW 9 | SW 13 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 20 | SW 19 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 |
Wave Graph | |||||||||||||||||||||
428 | 395 | 539 | 355 | 350 | 238 | 144 | 138 | 83 | 76 | 54 | 102 | 95 | 155 | 97 | 184 | 260 | 330 | 255 | 305 | 322 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | off | glassy | off | off | cross-on | cross-off | cross-off | cross-on | off | cross-off | cross-off | off | off | cross-on | off | cross-off | cross-on | off |
High Tide | 6:44PM2.14m | 7:05AM2.29m | 7:29PM1.98m | 7:50AM2.14m | 8:19PM1.83m | 8:42AM2.01m | 9:18PM1.72m | 9:42AM1.92m | 10:27PM1.68m | 10:48AM1.90m | 11:37PM1.71m | 11:52AM1.94m | 00:37AM1.80m | ||||||||
Low Tide | 12:41PM0.36m | 00:48AM0.44m | 1:26PM0.49m | 1:32AM0.59m | 2:16PM0.61m | 2:20AM0.72m | 3:14PM0.71m | 3:18AM0.82m | 4:20PM0.75m | 4:26AM0.86m | 5:27PM0.73m | 5:34AM0.84m | 6:25PM0.66m | ||||||||
5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | |
— | 6:00 | — | — | 5:59 | — | — | 5:59 | — | — | 5:58 | — | — | 5:58 | — | — | 5:57 | — | — | 5:57 | — | |
mm | 3 | 12 | 4 | — | — | 1 | — | 5 | 4 | — | — | — | — | 1 | — | — | 3 | — | — | 2 | — |
Temp °C | 29 | 29 | 27 | 30 | 29 | 26 | 29 | 28 | 26 | 31 | 29 | 28 | 32 | 32 | 27 | 32 | 29 | 26 | 31 | 29 | 27 |
Feels °C | 32 | 33 | 30 | 33 | 33 | 28 | 32 | 31 | 30 | 35 | 31 | 33 | 34 | 36 | 28 | 36 | 33 | 26 | 34 | 32 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | S 8 | SSW 8 | SSW 9 | S 11 | S 11 | S 11 | S 11 | S 11 | S 10 | S 10 | S 9 | S 9 | S 9 | S 9 | SW 17 | SW 16 |
428 | 395 | 539 | 355 | 350 | 113 | 120 | 123 | 275 | 345 | 351 | 345 | 269 | 198 | 153 | 109 | 106 | 83 | 81 | 305 | 322 | |
Swell 2 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | S 8 | S 8 | SW 14 | N 5 | SW 13 | SW 13 | SW 15 | SW 15 | N 5 | SW 14 | SW 14 | SW 13 | SW 13 | SW 18 | SW 18 | SW 18 | S 9 | S 9 |
98 | 100 | 95 | 89 | 88 | 238 | 33 | 138 | 83 | 76 | 54 | 17 | 95 | 155 | 84 | 85 | 260 | 330 | 255 | 81 | 79 | |
Swell 3 Height (m) Direction Period (s) | N 4 | N 5 | S 12 | SW 7 | N 4 | NW 8 | SW 13 | N 5 | SSW 19 | SW 12 | SW 12 | SW 14 | N 5 | SW 20 | SW 20 | SW 19 | SW 13 | SW 12 | SW 12 | SSW 12 | SW 12 |
2 | 8 | 3 | 12 | 1 | 3 | 144 | 7 | 36 | 36 | 36 | 102 | 7 | 98 | 97 | 184 | 84 | 75 | 72 | 56 | 36 | |
Wind waves Height (m) Direction Period (s) | — | — | N 4 | — | — | N 4 | — | — | NNE 4 | N 5 | — | — | — | — | NNE 4 | N 6 | NNE 4 | NNE 5 | N 6 | N 5 | NNE 5 |
— | — | 9 | — | — | 9 | — | — | 2 | 4 | — | — | — | — | 6 | 40 | 20 | 30 | 36 | 24 | 15 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 0 | 10 | 0 | 29 | 0 | 0 | 0 | 10 | 0 | 10 | 10 | 0 |
Best forecast wave conditions in Guanacaste | |||||||||||||||||||||
Best forecast wave conditions in Costa Rica | |||||||||||||||||||||
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Information about the El Estero Surf forecast
The above surf forecast table for El Estero provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at El Estero can be found by selecting the local surf guide option on the grey menu. Our El Estero 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 (El Estero) 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 El Estero 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.
El Estero is 47 km (29 miles) from Nicoya. If you plan a holiday in Guanacaste, look for hotels and other accommodation in Nicoya. Nicoya has rooms for a wide range of budgets as well as car hire and transport links.











